-------
- 137 -
NOX SCRUBBING DATA SHEET
DATE: 3-24-72 SCRUB: Water with additions
OBJECT: To absorb NO
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm3 per minute
Pot Temp. 122 °F Initial pH Final pH
H..O 10 _% C00 12 % 0^ 3 f
NO 485 PPm N02 0 ppm SO., NA PDm
COMMENT:
(1) FeCl3 is not effective. Neither is plain 3% H202.
(2) 30% H202 does work, but not well. The addition of FeCl3,
catalyzes the system well.
(3) The KMn04 proved best.
NO: Na2S03—> Dry Ice—> NDIR
-------
3-30-72
MgSO,
ppm
x 100
CNl £M
3 0 O
a a to
LO 5 30
• i
) ' 27 —
1 i -
J 4 24 —
, i -
' ! 2.1-
> 3 18 —
, i -
i 15~
i -
2 12 — -
. i -
i 9 ~~
i -
16 —
i
i 1 "
! 3 "~"
1 i
1 -
I i
! 1
BP ^
«- — »
t
*'5
-f
)
1
5.3
6.3
pH
u>
00
10
Time in Minutes
-------
- 139 -
NOX SCRUBBING DATA SHEET
DATE: 3-30-72 SCRUB: MgS03 (5 gm/1000 ml
OBJECT: N02 - S02 Absorption
o
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 126 °F Initial pH 9.4 Final PH 3.75
H0 10 7. C02 _ 12 _ % 02
2
NO _ NA ppm N02 690 _ ppm S02 2610 DDm
COMMENT :
(1) N02 dropped quickly to zero and then increased steadily.
NO: Na2S03 —^ Dry Ice —» NDIR
-------
4-3, 4-5-72
CaSC>3 Long Term and Vary pH
ppm
x 100
es
O
I
o
w
1°'
30
( r
T -
4 2,4"
, I
I f\ i ~""
6 3
I
I
18*
15'
I
I
4 2 }2
' , I
- I ~ —
•2 X ^
1 > I
c _
1 i
Q Q Q
I '
BP
7.6
7.4
T
Q
I
20
40
60
BP
E- -»
75
I
i r
95
115 135 180
I I
Time in Minutes
300 320
-------
- 141 -
NOX SCRUBBING DATA SHEET
DATE: 4-5"-72 SCRUB: CaS03 (25 gm per litre of water)
OBJECT: N02 - S02 absorption
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm3 per minute
Pot Temp. 126 °F Initial pH 9.1 Final PH 7.25
H00 10 % CO, 12 % 00 3 7
2 i. — 2
NO NA PPm N02 86° ppm SO,, 1890 PDm
COMMENT:
(1) The N02 and S02 were absorbed to the level of 100%.
NO: Na2S03 —> Dry Ice —> NDIR
Page 1 of 3
-------
- 142 -
NOX SCRUBBING DATA SHEET
DATE: 4-5-72
SCRUB: Bath from page 1
OBJECT: Continue CaS03 scrubbing
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. _125__°F Initial pH 7.5 Final pH 3.5
NO
10
12
0
ppm
N0
710
ppm
S0
183
ppm
COMMENT:
(1) When pH went below * 7.2, the N02 level increased quickly
and settled down to = 46% absorption.
(2) After passing - pH 6.1, the pH dropped very quickly to
3.5, reducing the N0£ scrubbing to = 34% and generating
an off scale "NO" reading..
Page 2 of 3
-------
- 143 -
NOX SCRUBBING DATA SHEET
DATE: 4-5-72 SCRUB: Bath from Page 2 with 2 qm of
MgS03 added
OBJECT: pH variation with H2S04 (* 10%) and NaOH (= 10%)
CONDITIONS: Scrub
Pot Temp. 126
H^O 10
NO 0
vo lume
7,
_ppm
@ 1000 ml
Initial pH
C0rt
N0«
Total Gas Flow
6.1
12 70
700 ppm
@ 3200
Final
so9
3
cm per
PH
3
2250
minute
PPm
COMMENT:
{!) After going on line, the pH quickly dropped with the N02
appearing to head back to the level recorded on page 2.
(2) At - pH 4.4, "NO" broke through to an off-scale reading.
Turning the N02 off did not effect it. Turning the SOo'
off immediately brought the "NO" down.
(3) With the S02 and N02 off, a decrease in pH (with H?SO,)
causes the "NO" to again rise; increase pH with NaOH
again removes the NO.
Page 3 of 3
-------
4-7-72
Comparison of Mg(OH) and Ca(OH)
ppm
x 100
i I I fV4 lri I
4s
I
-------
- 145 -
NDY SCRUBBING DATA SHEET
DATE. 4-7-72 SCRUB: Mg(OH)2 and Ca(OH)2
Mg(OH)2 @ 14 gm/1
OBJECT: N02 - S®2 Absorption
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp,
126 °F Initial pH 9.35 Final pH 7.6
H o 10 % C02 12 % 02 3 %
NO NA ppm N02 680 ppm S02 2610__ppm
COMMENT:
•3
(1) At 2610 ppm S02 and a total flow of 3200 cm /min, we would
need 706 min of 100% absorption to yield 803" level of
25 gm of MgS03<
NO: Na2S03—> Dry Ice—^ NDIR
Page 1 of 4
-------
- 146 -
NOX SCRUBBING DATA SHEET
DATE: 4-7-72 SCRUB: Mg(OH)2 from Page 1 acidified to
pH 7 from 7.6 with H2S04
OBJECT: N02 - S02 Absorption
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 126 °F Initial pH 7.0 Final pH see chart
H20 10 % C02 12 % 02 3 %
NO NA ppm NO, 630 ppm S09 2460 ppm
COMMENT:
(1) Large volumes of gas were liberated with the addition
of the H2S04. The pH dropped rapidly and then came
back up slowly.
Page 2 of 4
-------
- 147 -
NOX SCRUBBING DATA SHEET
DATE: 4-7-72 SCRUB: Mg(OH)2 from Page 2 + more
Mg(OH)2 + pH 8.35
OBJECT: s crabbing NO
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm3 per minute
Pot Temp. 126 °F Initial pH 8.35 Final pH
HO 10 % C00 12 % 0 3
2 z 2 ./°
NO 37° ppm NO, ^ ppm S0_ 2460
J2 —tZ2iL__PPni
COMMENT:
(1) No NO was absorbed.
Page 3 of 4
-------
- 148 -
NOX SCRUBBING DATA SHEET
DATE: 4-7-72 SCRUB: Ca(OH)2 [17.8 gm Ca(OH)2 per
1000 ml H20]
OBJECT: Comparision of Ca and Mg systems
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 125 °F Initial pH 11.2 _ Final pH 6.4
H20 _ 10 % C02 _ 12 _ % 02 _ 3 _ %
NO . NA _ ppm NO _ 680____ppm SO. 2460 ppm
COMMENT :
(1) With oxygen present, the Ca(OH)_ appears to be more efficient.
Page 4 of. 4
-------
4-10-72
Ca(OH),
ppm
x 100
CN CS
000
fa V5 W
10 5 30-
I , M
9 j J
I ' I 4
8 4 24'
I i
7 ! 21-
• ' i
6 3 18—|
I I
.':r
4 2 12
I , i
3 ' ,9
I ' i
216
1 , i
1 | 3
I ' i
Q Q Q
i i
BP
pH
V
BP
k—>
6.5
7.0
6.4
V
U-l
m
o
ts
o
30%
0
I
I I I I I I I
20 40 60 80 100 120 140 160 180
Time in Minutes
-------
- 150 -
NOX SCRUBBING DATA SHEET
DATE:
4-10-72
SCRUB: Ca(OH)? slurry (15 gm per litre
of H20)
OBJECT: Ca(OH)2 vs. ZnO
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow
Pot Temp. 126 °F Initial pH 11.2
NO
10
12
70
NA
ppm
N0
700
_ppm
3200 cm per minute
Final pH 6.5
°2
SO,
7=
2490
_ppm
COMMENT:
(1) After the pH dropped below 7, the N02 absorption was 63%.
(2) Without 02, absorption - 90% and later at pH of 6.4,
with 02 back on, the absorption was -69%.
(3) The S02 absorption was 100%.
NO: Na2S03
Dry Ice
NDIR
-------
4-10-72
ZnO
PH
T
-49%
BP
°2
on
BP
V
i
M
Ul
M
I
-63%
40
50
60 70 80 90
Time in Minutes
100
100
I
i
110
120
130
I
-------
- 152 -
NOX SCRUBBING DATA SHEET
DATE:
4-10-72
SCRUB: ZnO slurry (10 gm per litre water)
OBJECT: Ca(OH)2 vs. ZnO
CONDITIONS:
Pot Temp.
Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
126
NO
10
NA
_ppm
Initial pH 9.3
CO,
NO,
12
700
ppm
Final pH 6.2
°2 3
SO,,
2520 ppm
COMMENT:
(1) N02 pullout was initially =63%.
(2) This dropped to 49% with lower pH (6.2),
(3) With the 02 off, 68% of N02 absorbed.
(4) Back on with C>2, 63% N02 absorbed.
(5) S0» absorption was always 100%.
NO: Na2S03
-> dry ice
NDIR
-------
4-11-72
Ca(OH).
ppm
x 100
CN CS
D O O
3 Z W
0 5 30 —
*
, 1 -
\ | 27 —
1 i -
J 4 24 _
. i "
7 ' 21 —
| ,
1 -
6 3 18 —
1
, 1 -
5 1 15 —
i "
4 2 12 —
, i -
3 j 9 —
' 1
1 *
216 —
1
, 1 -
1 1 3 _
1 ,
1 '
Q Q 0 —
i i
! 1
6
BP 5
M ^
^ 4
— -_
mmmmmm
V
1 4.9 4.6 4
T ^ i
no
°2
§
o
^^•^
• ••
r~ . -«-^*
******
-^— ***
^ **^"~
I 1 i >• i i i i i i i i I i I I ~i
0 20 40 60 80 100 120 140 160 1
1
PH
5
-
BP
t- ->
(
H
U
u
1
0
Time in Minutes
-------
- 154 -
NOX SCRUBBING DATA SHEET
DATE: 4-11-72 SCRUB: Ca(OH)2 slurry pre-doped with SO?;
15 gm/1000 ml H20
OBJECT: To test Ca(OH)2 lower pH and high S03=
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 124 °F Initial pH 6.1 Final pH 4.5
H20 !Q 7. C02 12 % 02 3 %
NO NA ppm N02 670 ppm S02 2400 ppm
COMMENT:
(1) The slurry of Ca(OH>2 (15 gm/1000 ml H20) was stirred, and
through it bubbled an S02-N2 mixture until the pH was
between 6 and 7.
(2) M>2 scrubbing was on a par with former runs. The S02
broke through early and rose steadily.
NO: Na2S03—> Dry Ice—*- NDIR
-------
ppm
x 100
CS CN
O O O
a z w
10 5 30 —
1
1,1-
9 1 27 —
, 1 •
1 1 '
8 4 24 —
' , i -
7 1 21
i > i
1
1 1
6 3 18 —
i , i -
5i 15 —
i > <
1 1 -
4 2 12 —
' , i -
3«9 —
I *
1 1
216 —
I
1 t 1 -
1 ! 3 —
• .
' ' i -
1 i i
n
BP
f- — »
(
-J-J-" Na_S
2
pH = 9.32
+35 ppm
=95T -100Z *
1 1 I If |^ 1
) 10 20 30 40 50 60 70 80
1 1
BP
pH = 9.0
— -
1
t-
Lr
i
Time in Minutes
-------
- 156 -
NOX SCRUBBING DATA SHEET
DATE: 4-13-72 SCRUB: 1.88 molal Na2S
OBJECT: NC-2-S02 Absorption
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm3 per minute
Pot Temp. 131 °F Initial pH 9.32 Final pH 9.Q
H2° 8"10 % C02 _ 12 _ % 02 3 _ %
NO 0 _ ppm NO _ 650 _ ppm SO, 2250 ppm
COMMENT :
(1) The S02 absorption was 95% and for N02 was 100%.
Also generated 35 ppm NO.
(2) Also generated H0S.
NO: Na2S03 > Dry Ice —> NDIR
-------
CaC03 (10 g/1)
4-14-72
CaC03 (4 g/1)
ppm
x 100
20 40 60 80
Time in Minutes
• i i r i I i
160 180 200 220
(Continued)
-------
CaCO (Continued)
ppm
x 100
o o o
S S5 M
10 5 30 —
' • i -
9 ! 27 —
| •
I -
8 4 24 —
t
.
7 ' 21 —
1 i -
6 3 18—
,
, 1 -
5 | 15 —
1 i -
4 2 12 —
3 j 9 -
i -
216 —
. i -
i1 \~-
! 1
* i
i i
Off Scale
f Y
i
1 i
i i
! i
/ i
_ *
i i
L'j /~~"
1 ' ' •
i i /
t /
,' ' :
i i'
/fM/
i i;
i
-' /\
t
(
i
200 ?20 240 260 280 300
I Time in Minutes
-------
- 159 -
NOX SCRUBBING DATA SHEET
DATE- 4-13-72 SCRUB: CaC03> 10 gm in 1000 ml H20
4-14-72 ~
OBJECT: Calcium Carbonate Scrubbing
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 128 °F Initial pH 7.5 Final pH 6.2
_10 % C02 12 % Q2
NO NA ppm N07 650 ppm S0 2280
COMMENT:
The flow slowly degraded during the run (frit was
clogged) and the results are therefore inconclusive. The
run was continued on 4-14-72 after being run for 50 minutes.
NO: Na2SOo—>• Dry Ice => NDIR
Page 1 of 3
-------
- 160 -
NOX SCRUBBING DATA SHEET
DATE: 4-14-72 SCRUB: CaC03 from 4-13-72
OBJECT: CaC03 Scrubbing
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 128 °p Initial pH >7 Final pH 6.2
H20 10 % C02 12 % 02 3 7.
NO NA ppm N02 650 Ppm S02 2280 ppm
COMMENT:
(1) Scrubbing of N02 improved when 02 was removed from flue gas.
Page 2 of 3
-------
- 161 -
NOX SCRUBBING DATA SHEET
DATE. 4-14-72 SCRUB: CaCOs, 4 gm in 1000 ml H20
OBJECT: N02-S02 Absorption
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 128 °F Initial pH 7.2 Final pH 3.1
HO 10 % C00 12 % 00 3 7
*^ O ^^_'° y .— .. —i—•. .—— .•.. .11 • i i .1 . — o __^^_^^__^___^_ . a |B /o
NA ppm N0 65° ppm S0 2280
NO ppm N02 _ ppm S02 PDm
COMMENT:
(1) The addition of 40 rag (=3.3 x 10~ moles) of CaS03 at
60 min had no effect.
(2) At 80 min, the addition of 40 mg Na2S03 had a momentary
effect of reducing N02 by 10 ppm.
(3) The elimination of 02 caused a decline in the N02 level
that slowly rose again as the pH dropped.1
(4) At a very low pH (- 3.1) the S02 broke through to about
the bypass value and then started dropping off again. At
the same time, a surge of NO was generated.
Page 3 of 3
-------
4-17-72
H_0 with Plus Product Salts
ppm
x 100
280 300
320 340 360
Time in Minutes
-------
- 163 -
NOX SCRUBBING DATA SHEET
DATE:
4-17-72
SCRUB: 1000 ml H20 with salts added at
time intervals
OBJECT
. To check the scrubbing of water and various product salts
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
122 °F Initial pH 6.7 Final pH
% 0
Pot Temp.
H20
NO
10
7«
ppm
CO,
NO,,
12
650
_ppm
'2
S0r
2400
7
to
_ppm
COMMENT:
(1) N02 pullout, with or without 02 but with S02 is * 42%.
(2) S02 pullout with or without 02 and with or without CaCl2
is « 13%.
(3) The CaCl2 does not seem to effect the N02 pullout.
(4) Without S02, the N02 level slowly rises, though not very
much (- 40 ppm in 40 min).
(5) Without 02 and with MgS04; S02 pullout is -23%, and N02
- 46%.
(6) With 02 on and with MgS04, S02 level decreases to zero
(100%) and the N02 seems unchanged.
(7) At an absorption of 280 ppm N02 (1st 10 min) and 3200 c
of gas, using 4N02 + 2H20 •> 2HN03 + 2HN02 the theoretical
pH is 3.44, (3.5 was measured) assuming total ionization.
NO: Na2S03
Dry Ice
NDIR
-------
4-18-72
Mg(OH),
SEE
ex ex ex
ex ex ex
o o o
o o o
j-j _- j _j
XXX
O P O
2; !s OT
10 5 30 —
'.I-
i i
i
9 i 27 —
I '
1 1 -
8 4 24 —
1 '
, 1 "
7 1 1 21 —
1 1 1
1
6 3 18 —
i
1 , 1 -
5 1 15 —
i 1 •
1 I -
4 2 12 —
| i
' , 1 -
319 —
i ' i -
i
216 —
f
1 1 -
1 1 '
f 'i~
1 |
II
i 1
B
p
L_!
IM
I
9
•M
N02 + S02
w/o 02
o
1 bath
4
8.1 7.
V
I 1 1 1
NO
w/
BP
1
"• ~"
>
r
""
+ so
°2 2
o
2 bath
8.
6 8.5
' M
8^ 8^3
_ —
1 1 1
SO
on
in
ba
,BP ft
^MM
y
2°
h
.0
1 1
0 100 200 275 0 50 100 0 20 40
B
P
r\
1 bath
cont'd
w/ all
gases
T
••i
2
<— 4
BP
' •
8.
t
(
H
H
II
1
i i P
19-72 *
r
,
••^
1
2° bath cont'd
+ Hydroquinone
?H
7V8
r^
f
1 i M 1 1 1 1 1 1
0 330 100 120 190 300
1 110 1310 1
B
P
f —
7
••M
Time in Minutes
-------
- 165 -
NOX SCRUBBING DATA SHEET
DATE:
4-18-72
SCRUB: Mg(OH)2 slurry 15 gm/1000 cm3
of H20
OBJECT: Observe effect of oxygen
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 124 °F Initial pH 9.4 Final PH 7.9
H2°
NO
10
7
la
NA
_ppm
CO,
NO,
12
670
_ppm
°2
S0r
0
2370
_ppm
COMMENT:
(1) Both the N02 and S02 dropped to zero and remained so
for the 270 minutes of run time.
NO: Na2S03 —=> Dry Ice
NDIR
Calibration filter in S02 analyzer Indicated improper readout,
S07 value in question, is probably much higher.
Page 1 of 5
-------
- 166 -
NOX SCRUBBING DATA SHEET
DATE: 4-18-72 SCRUB: Mg(OH)2 15 gm/1000 cm3 H20
OBJECT:
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. _125__°F Initial pH 9.6 Final pH 8.1
H20 10 % C02 12 % 02 3 %
NO NA _ ppTO N0 640 _ ppm S0 2250 ppm
COMMENT :
(1) N02 dropped rapidly to - 250 ppm and then rose slowly
to 275 ppm.
(2) All the S00 was absorbed.
Page 2 of 5
-------
- 167 -
NOX SCRUBBING DATA SHEET
DATE: 4-18-72
SCRUB: Mg(OH)2> 15 gm/lOQQ cm3 of
OBJECT :
CONDITIONS: Scrub volume @ 1000 ml
Pot Temp. I25 °F Initial pH
H-0 10 % CO,
NO NA ppm NO, NA
Total Gas Flow @ 3200 cm3 per minute
8>0 Final pH 8.0
12 °L Oo 3 7
2. '"
own SO., 2370 ppm
COMMENT:
(1) All the S02 was absorbed.
(2) The bath came back to a pH of 9.3 when allowed to stand
over-night «? 20°C).
Page 3 of 5
-------
DATE:
4-18-72
- 168 -
NOX SCRUBBING DATA SHEET
SCRUB: Mg(OH)2, 15 gm in 1000 ml
H20; both from initial runs
OBJECT:
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 125 °p Initial pH 7.2 Final pH 6.95
37
" L - Z
NO • "•
NA
_ppm
670
ppm
2
S0r
2490
ppm
COMMENT:
(1) pH at 7.2 after 20 minutes at thermal equilibrium and
no gas flow.
Page 4 of 5
-------
- 169 -
NOX SCRUBBING DATA SHEET
DATE: 4-lfr-72 SCRUB: Mg(OH>2
OBJECT: Scrub N0£ - SC-2 in presence of Hydroquinone (1.0 gram)
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 125 °p Initial pH 8.1 Final pH 7.7
H20 1Q _ % C02 _ ~ _ 7° °2 3 _ 7o
NO NA _ ppm N09 _ 650 _ ppm SQ 2280
COMMENT:
(1) Addition of HQ increased N0_ absorption by
= 250 ppm.
Page 5 of 5
-------
4-24-72
2 Molal NH HS03> 0.5 Molal
c
o
10
9
8
7
6
1
1
5
4
3
2
1
0
ppm
x 11
s
o
z
5
1
1
1
4
1
1
3
1
1
1
2
1
1
1
1
1
1
1
0
i
I
1
30
CM
O
OT
30 —
i
1 -
27 —
1
24 —
1
1 -
i
1 "
18 —
1
I -
15 —
I
-
1
12 —
i
I
9 —
1
6 —
i
1 "
•5 « g-—
I mm
[
I
1
PL.
pa
i
•i
—
C
pH
'
i
93
5.85 5.8 5.75
'
+ NH.OH — j> pH 5
\\
\^
...
— —•-~— " ~~ -81%
-94%
— — -j
1 1 1 1 1 1 1 1 1 1 f 1 1 1
) 10 20 30 40 50 60 70 80 90 100 110 120 130 140 15
1
BP
( —
— — -
9
0
1
Time in Minutes
-------
- 171 -
NOX SCRUBBING DATA SHEET
DATE. 4-24-72 SCRUB: 2 molal NH4HS03 with 0.5 molal
(NH4)2S04
OBJECT: Maintain pH of solution.
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 122 °p Initial pH 5.93 Final pH 5.9
HO 10 % C00 12 % 09 3 %
H2u . 2 2
N0 — ppm N02 700 ppm S02 2370 ppm
COMMENT:
(1) The S02/absorption decreased steadily through the run
from 84% initially to 65% at 145 min. The addition of
base (NItyOH) at 145 min, increased pullout to 81% at
pH of 5.9.
(2) N02 pullout was =94%.
(3) It appeared that some NO was made, but within the
sensitivity of the instrument, it is not possible to
say exactly how much. Approximately 5-10 ppm is the
best estimate.
NO: Na2S03 —=> Dry Ice > NDIR
-------
4-25-72
2 Molal NH,HS00. 0.5 Molal (NH.)0SO,
43 424
CM CM
O O O
10 5 30 —
i i i -
9 j 27-
1 1 -
8 4 24~
1 . i -
7 ' 21-
1 i -
6 3 18 —
1 i
1 '
5 1 15-
1 ' i -
4 2 12 —
1 , i -
319 —
' i -
216 —
1 , i -
1 1 3 -
i ' i -
0 0 0 ~~
1 i i
BP
«- ~5
1
^•^^•M
0
1
7 pH
NO @ -100%
so0 e -100%
4 F L
NO @ ^ + 10 ppm
x 150°F UO°F
o
!L
s
1^-
r-
•s.
o
4-1
•
<
^^^^^^^^^^^^^^^^^^ III
5 10 15 20 25 30 3'.
BP
— ^^^—
I
h-
N.
1
i
Time in Minutes
-------
- 173 -
NOX SCRUBBING DATA SHEET
DATE: 4-25-72 SCRUB: 2 molal NlUHSOq + 0.5 molal
OBJECT- Observe effect of increased pH on solution used in run
4-24-72
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 124 °p Initial pH 7.7 Final pH
H20 10 _ % C02 _ 12 _ % 02 3 _ %
NO — ppm N0 _ 680 _ ppm S0 2340 ppm
COMMENT:
ppm N2 _ _ ppm 2
(1) S02 and N02 levels decreased after adding NltyOH;
AS02 and AN02 are 100% with 10 ppm NO generated.
(2) Solution temperature rise due to heat of neutralization.
NO: N32S03 > Dry Ice—>• NDIR
-------
4-25-72
30 Wt.% H0SO.
2 4
ppm
x 100
.5-
1 -
—
__
_
i
^™
~
.5 "
J
BP
Cr -^
(
1
. — . _
1 1 i i 1 1 i i I 1
) 10 20 30 40 50 60 70 80 90 100 i]
1
BP
*~
— —•
LO
Time in Minutes
-------
- 175 -
NOX SCRUBBING DATA SHEET
DATE: 4-25-72 SCRUB: H2S04 30 wt. % in water
OBJECT: NOX scrubbing with H2S04
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm3 per minute
Pot Temp. 120 °F Initial pH — Final pH —
H20 10 % C02 12 % 02 3 %
NO 350 ppm N00 300 Ppm SO,
_ppm S02 0 ppm
COMMENT:
(1) No NO was absorbed.
(2) Some N02 (- 50 ppm) was absorbed and approximately 18 ppm
of S02 was generated.
NO: Na2S03—^ Dry Ice —*• NDIR
-------
4-26-72
Mg(OH) with Hydroquinone
ppm
x 100
CM CM
O O O
Z Z en
10 5 30 —
1 •
1 1 I -
9 1 27 —
i ' i -
8 4 24 —
1 , i -
7 21 —
I i
1 1 -
6 3 18 —
i . i -
15-
, 1 •
1 1 -
1
4 2 12 —
1'
| -
3 i 9 -
1 ' I
1 1 -
21 £
1 , i -
1 i 3 —
i ' i -
III
9
i
BP
...
•^M
Btt
» V i8 v
8.7 8.1
V V
a-
re
oo
6
VO
?
Leak —
"~\- 1
s^/
1 1
o-
X
£
•
CM
+
/ "
J
O1
a
oo
a
.—i
•
+
O^
g-
oo
e
^
i/*^
o
+
(~\ flow down, NC»2 high
^-^| ^^tirrer stalled re-start
— L/
\s
1 I I I I 1 1 1 1 | 1 | 1 1 1 1 1 1 1 I 1 1 1 I 1 1 1
0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300
' Time in Minutes
55
1
e ->
BP
^^"^"™ i
i-
CT
1
-------
- 177 -
NOX SCRUBBING DATA SHEET
DATE: 4-26-72 _ SCRUB: Me (OH) 2 slurrv. 15 gm
H20
OBJECT : Add various amounts of Hydroqulnone
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm3 per minute
Pot Temp. 122 °p Initial pH 9.38 Final pH 7.55
H20 10 _ % C02 _ 12 _ % 02 3 _ %
NO NA _ ppm N02 705 _ ppm SQ2 2220 ppm
COMMENT :
(1) Final N02 removal was * 70%, SO absorption was 100%.
NO: Na2S03—V Dry Ice > NDIR
-------
Mg(OH)
ppm
x 100
4-27-72
V
Hydroquinone; variation of HQ level and its net effect
PH
7.45
V
S1
01
0)
.-I
o
X
CM
•
r~-
rH
+
o
in
o
20
30
I
40
cr
ffi
00
-------
- 179 -
NOX SCRUBBING DATA SHEET
DATE: 4-27-72 SCRUB: Mg(OH)2 slurry, 3 gm in 1000 ml
of H20
OBJECT: Hydroquinone testing as an anti-oxidant
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 126 °p Initial pH 9.4 Final pH 4.5
H20 10 _ % C02 12 _ % Q2 3 _ %
NO NA _ ppm N02 _ 700 _ ppm SO. 2250 ppm
COMMENT :
(1) The increasing amounts of HQ added had greater effect
and also lasted longer.
NO: NaS0
2S03 — ^ Dry Ice - ^ NDIR
-------
CaC03 with and without CL and HQ
ppm
x 100
Time in Minutes
-------
- 181 -
NOX^SCRUBBING DATA SHEET
DATE: 4-28-72 SCRUB: CaC03 slurry 10 gm in 1000 ml
of H20 (with and without HQ)
OBJECT: Absorb N02-S02
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm3 per minute
Pot Temp. 124 °F Initial pH ?* Final pH 6.25
H20 10 % C02 12 % 02 3** %
NO NA ppm N02 700 ppm SO 2220 ppm
COMMENT:
* pH electrodes were not working correctly
(calculated pH @ 50°C = 10).
** 02 level was varied from zero to 3%.
(1) N02 scrubbing was better without the 02.
[~ 75% without and 64% with]
(2) The hydroquinone reduced the N02 to the 02 free level.
NO: Na2S03-^. Dry Ice—>-NDIR
-------
5-1-72
Ca(OH) , Vary 0_ and Hydroquinone
ppm
x 100
CM CM
O O O
53 a co
10 5 30 —
i i i -
9 | 27 —
' i -
8 4 24 —
•
1 1 -
1 '
7 | 21 —
i ' i -
6 3 18 —
1 , i •
i i
5 1 15-
1
1 i -
4 2 12 —
1 , i •
3 1 9 —
' i -
216 —
I
1 1 -
1 '
-L * ~J
1 ' '
1 1 -
1 ! '
1 : t
12
BP
«- -»
e
<—_Q
4-1
ff*
3
-H
?
8.2
W
7.9 7.25
T 7.3 *
^_
7,5
if
n
o
r
o
-86% j
20 40 60 80 100 120
TMTno
7.
1
O
EC
E
6
+
-71%
*
S
/
f
140 160
-f r» M-i r»n*-Q c
Pj
! 7.1
T
4-1
O
c-
O
-86%
i I i i i I i i
180 200 220 240
7.
-90%
i I 1 i I
260 280 300
)
t
BP
*- — >
^ ^^ —
I
M
00
to
1
-------
- 183 -
NOX SCRUBBING DATA SHEET
DATE: 5-1-72 SCRUB: Ca(OH)2 [10 gm per litre of water]
OBJECT: Vary 02 and Hydroquinone
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 123 °F Initial pH 12.2 Final pH 7.0
H20 10 % C02 12 % 02 3 %
NO NA ppm N00 700 ppm S00 2265 ppm
COMMENT:
(1) Without 02, absorbs approximately 86% N02, 100% S02;
with 02 - 71% N02 and 100% S02; with 02 and HQ = 86%
N02 and 100% S02.
NO: Na2S03—>- Dry Ice —•>• NDIR
-------
5-2-72
Urea in HNO_
I a t
ex ex ex
ex
N £SI
o o o
a \z> w
o o o
o o o
.
10 5 30 —
I j i -
9 j 27 —
I i -
8 4 24 —
7 21-
I i
6 3 18 —
5
I'
4 2
,
I 15
I
12 -
i
o „»^
•
I -
216 —
I , i -
3 —
I i
000
ri
•
NO only
NO
+
NO,
BP
BP
NO
2 only
i
>->
00
"T
40
T
50
T
60
-T
70
0
I
T
10
Time in Minutes
-------
DATE:
5-2-72
- 185 -
NOX SCRUBBING DATA SHEET
SCRUB: 28.5 gm Urea in 1000 ml 40%
OBJECT: N0x scrubbing with urea (NO only)
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 135 °F Initial PH NA Final pH NA
10 %
NO 475
H20
COMMENT:
CO,
12
7
/o
0
_ppm
NO,
NA
_ppm
2
SO,
NA
_ppm
(1) No absorption = 42%.
(2) Made * 360 ppm N02, equivalent to 75% of input NO,
(3) Frit had tendency to clog.
NO: Na2S03-
Dry Ice > NDIR
Page 1 of 3
-------
DATE: 5-2-72
- 186 -
NOX SCRUBBING DATA SHEET
SCRUB: Urea in HNOi
OBJECT: N0 + N0? Absorption
CONDITIONS:
Pot Temp.
Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
135
10
Initial pH
CO,
NA
12
Final pH
0
NA
NO
322
ppm
NO,
310
ppm
2
SO,
COMMENT:
(1) Used an open tube for 1st 5 minutes.
(2) No absorption without frit = 23%; made 10 ppm
(3) No absorption with frit - 54%; made 50 ppm NO-
NA
ppm
Page 2 of 3
-------
- 187 -
DATE: 5">72
OBJECT:
NOX SCRUBBING DATA SHEET
SCRUB: Urea in HN03
^sorption
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
135 °F Initial pH NA Final pH NA
7. C02 _ J^ _ % 02 3 %
S0
Pot Temp.
NO
COMMENT :
10
NA
ppm
PPm
NA
(1) Absorption of N02 - 47%.
(2) Made - 20 ppm NO.
(3) Tried adding S02 but frit plugged immediately,
ppm
Page 3 of 3
-------
5-3-72
Urea in
i e a
P. IX 0.
p.
CM fsl
O O O
O O O
O O O
rH H rH
LO 5 30 —
1 , i -
J | 27 —
1 i
1 -
3 4 24 —
7 I 21 —
1
1 '
io TO
> 1 15 —
t
1 "
i 2 12
. i "
» ! 9 —
16 —
i
1 1 -
1 3 _
• ' i -
i
! 1
BP
pH
3.
NO
only
35
i
BP
H
3.
9
NO
so2
1
•
/
V
BP
1
1
1
t
1
1
1
1
1
1
"
,
\
NO
N02
,
1
/\
BP
•f
I
I
1
NO
N02
so2
/
0 10 0 10 20 0 10 20 30 0 10
III It 1
Time in Minutes
00
00
-------
- 189 -
NOX SCRUBBING DATA SHEET
DATE: 5-3-72 SCRUB: Urea in H20 [231 gm in 1 litre
H20] 3.85 molal
OBJECT: Absorption of NO
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 122 °F Initial pH 3.85 Final pH 3.9
H20 10 % C02 12 % 02 3 %
NO: Na0SO^ —>• Dry Ice > NDIR
Page 1 of 4
NO 4-80 ppm N02 NA ppm S02 NA ppm
COMMENT:
(1) About 15 ppm of NO absorbed (= 3%).
-------
- 190 -
NOX SCRUBBING DATA SHEET
DATE: 5-3-72 SCRUB: Urea in H?0
OBJECT: Absorption of NO and S02
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 122 °F Initial pH 3.9 Final pH
10 % C02 12
NO 490 ppm N02 NA ppm S02 2154
COMMENT:
(1) Basically no absorption of NO.
(2) S02 level went nearly to zero and rose slowly.
Page 2 of 4
-------
- 191 -
NOX SCRUBBING DATA SHEET
DATE:
5-3-72
SCRUB: Urea in HgO (solution had already
been used for NO-S02 absorption)
OBJECT : Absorption of NO and N02
CONDITIONS: Scrub volume
Pot Temp. 122 °F
H»0 10 %
NO 339 PPm
@ 1000 ml Total Gas Flow (
Initial pH 3.9
CO. 12 %
NO. 390 PPm
3
a 3200 cm per minute
Final pH
0. 3 %
S00 NA PPm
COMMENT :
(1) NO absorption * 11%.
(2) N02 absorption = 36%.
(3) Generated 750 ppm S02 initially, which tappered off
while running.
Page 3 of 4
-------
DATE:
5-3-72
- 192 -
NOX SCRUBBING DATA SHEET
SCRUB: Urea in H20
OBJECT' Absorption of NO, N02 and S02
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 122 Op Initial pH 3.9 Final pH
H20 10 % C02 12 % ' 0, 3 %
NO 323 ppm N09 400 ppm
'2
SO,
2154
_ppm
COMMENT:
(1) No absorption - 7%.
(2) N02 absorption * 38%.
(3) S0_ absorption = 89% initially; decreased with time
Page 4 of A
-------
5-4-72
Mg(OH)2 with NO, N02,
pp
0
o
1-1
X
CN
10
1
9
1
8
1
7
i
6
1
5
4
1
3
1
2
I
1
i
o
m
0
o
»H
X
o
5
,
t
I
4
1
1
3
i
1
1
2
1
1
t
1
i
o
i
i
i
(
T
*
2
2
2
1
1
f
1
1
•
1
9
i
6
t
1
3
i
1
o
i
1
^
D
X
CM
o
.n
to —
I
7 —
4 —
-
1 —
8 —
•
5 —
•
2 —
•—
-
—
-
m^^m
*
^^H
BP
9
__. .
— —
—
1
••••••••
0
1
•rtU
pH
^r
Off On
* S02 i
,95 8,
9^0 8^8
\
V \
\
I
1
\
\ i v
\ \
\ 1 \ 1
1 ' ' ' i i i i i i i "™"T^ ~r
10 20 30 ^0 50 60 70 80' 90 100 110 120 130 140 15
Time in Minutes 1
BP
^ _
4
t
^•a
••••
0
vo
U)
-------
DATE: 5-4-72
- 194
NOX SCRUBBING DATA SHEET
SCRUB: 15 gm Mg(OH>2 in 1000 ml of
water (slurry)
OBJECT: NOX-SOX Absorption
CONDITIONS: Scrub volume & 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 122 °p Initial pH 9.95 Final pH 8.4
H20 10 7. C02 12 % 02 3 %
NO 350 ppm N00 340 ppm SO- 2220 ppm
COMMENT:
(1) More N02 was scrubbed then NO as would be expected
(40% NO + 76% N02 absorbed).
(2) As usual for this type of run, all the S02 was
scrubbed.
NO: Na2S03
Dry Ice
NDIR
-------
5-5-72
Mg(OH)2 with Hydroquinone (Endurance Run)
i. B
ex a
ex
o
o o
H O
X
X
«M
O O
10 5
1
9 '
1
1
8 4
' ,
7 i
1
1
6 3
i
5 «
1
4 2
i
3 '
i
2 1
1
i !
1
0 0
i
i
§.
ex
o
o
H
X
fM
O
VI
30 —
i -
27 —
i •
24 -
i -
21 _
1
1 '
18 —
i
1 '
15 —
I
1 '
12 __
1
1 -
9 _
1
1 -
6 _
1
1 -
3 _
1
1 '
0 _
i
1
BP
*"*
3?
—
mmm
•M Hi
0 ]
PH
7.7
7.6
VO
01
10 60 70 80 90 100
I I
140 160 180 200 220
Time in Minutes
320 340 360
380
-------
- 196 -
NOX SCRUBBING DATA SHEET
DATE: 5-5-72 SCRUB: 15 g Mg(OH)2 plus 1.0 g
Hydroquinone
OBJECT: Endurance Run
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 122 °F Initial pH 9.9 Final pH 7.6
H^O 10 % CO,, 12 %
2
NO NA ppm N02 675 ppm SO- 2280 ppm
COMMENT:
(1) N02 dropped to zero initially; it came off zero =* 80 min.
and rose slowly.
(2) The S02 dropped to zero and stayed there for the entire
run.
(3) Solution became more yellow as the run progressed.
NO: Na2S03 —> Dry Ice >NDIR
-------
5-9-72
Urea in H0SO.
2 4
& a
ft, E cL
ex ex
«M ft
O CM
2! 0 0
2 co
0
000
«H O O
X ^ ^
10 5 30 —
*
1 . 1
9 | 27 —
i i
8 A 24 —
i !
1 « 1
7 j 21-
1 i -
6 3 18-
1 , i •
5i 15 —
I •
' 1 '
A 2 12
, i -
3 | 9 _
1
i •
216 —
1 j
1 J 3 _
1 i
1 1 '
i i
BP
^» '
*» ~* "TF
no absorption
NO
only
pH = 1.8
1
I
1
1
1
I
t
i
I
1
BP
r >
NO + NO
BP
1
1
*^^m
JL.
0 10 20 30 0 10 20 30
I 1 I
^m
NO
only
BP
« ^
E
O
LT*
C")
-------
- 198 -
NOX SCRUBBING DATA SHEET
DATE: 5-9-72 SCRUB: Urea in H?SO/f: 1 Kg 10%
urea soln + 30 ml 6N H?S04
OBJECT: To absorb NOX with urea.
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. __125__°F Initial pH 1.8 Final pH Not Taken
H n 10 7 rn 12 '/ o ^ 7
"O '° IjUn *^- /o \Jn -3 I"
COMMENT:
(1) Essentially no absorption of NO.
NO: Na2S03 > Dry Ice >- NDIR
Page 1 of 6
NO 520 ppm N02 NA ppm S02 NA ^ppm
-------
- 199 -
NOX SCRUBBING DATA SHEET
DATE: 5-9-72 SCRUB: Urea in H?S04
OBJECT:
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 125 °F Initial pH _ 1.8 Final pH _
10 _ % C02 _ 12
Page 2 of 6
NO 340 _ ppm N02 330 _ ppm S02 NA _ ppm
COMMENT :
(1) Some absorption of NO, - 15%.
(2) Some N00 absorbed, = 30%.
-------
- 200 -
NOX SCRUBBING DATA SHEET
DATE: 5-9-72 SCRUB: Urea in H2S04
OBJECT:
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 125 °F Initial pH 1.8 Final pH
10 % C02 12
Page 3 of 6
NO NA ppm N02 680 ppm SO,, NA ppm
COMMENT:
(1) N02 absorption - 54%.
-------
- 201 -
NOX SCRUBBING DATA SHEET
DATE: 5-9-72 SCRUB: Urea in H2SC-4
OBJECT:
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm3 per minute
Pot Temp. 125 °F Initial pH 1.8 Final pH
10 % C02 12 7.
NO NA ppm N02 700 ppm SO 2190 ppm
COMMENT:
(1) NO - absorption = 40%.
(2) SO absorption * 21%.
Page 4 of 6
-------
-202 -
NOX SCRUBBING DATA SHEET
DATE: 5-9-72 SCRUB: Urea in H2S04
OBJECT:
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 125 °F Initial pH 1.8 Final pH
H20 10 % C02 12
NO - 350 ppm N02 700 ppm S02 2190 ppm
COMMENT:
(1) N02 absorption ~ 44%.
(2) S02 absorption * 21%.
(3) NO absorption * 18%.
Page 5 of 6
-------
- 203 -
NOX SCRUBBING DATA SHEET
DATE: 5-9-72 SCRUB: Urea in
OBJECT:
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. __H5__°F Initial pH !•* Final pH
10 TL C02 12
NO 466 ppm N02 NA ppm S02 740 ppm
COMMENT:
(1) NO absorption was zero.
(2) S02 absorption * 10%.
(3) Information not on graph.
Page 6 of 6
-------
- 204 -
NOX SCRUBBING DATA SHEET
DATE: 5-15-72 SCRUB: Na2S, 2.1 molal
OBJECT: Sulfide scrubbing, Analyze dissolved NO-,
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 125 °p Initial pH — Final pH —
.10 % C02 12 % 02
NO ™ ppm N02 670 Ppm S02 — ppm
COMMENT:
(1) AN02 - 100%, with 23 ppm NO produced.
(2) Unable to analyze solution because of spectrophotometric
interference.
NO: Na2S03—>> Dry Ice >• NDIR
-------
6-22-72
(NH4)2S03-NH4HS02 Mixture
ppm
x 100
tN CS
o o o
& 'K U)
10 5 30 —
9 1 27 —
' i -
8 4 24 —
1 , i -
7 1 01
i i -
6 3 18 —
1 , i -
1 ' i -
4 2 12 —
1 i -
i
3 • i 9 -
i
1 '
216 —
1 , i •
1 ' 3 —
i
j
000 —
1 1
! 1
BP
f" ~4
.....
•M^M
0
\
pH = 6.3
-22%
^"'
^^^^^^^^^^^^^^^^^^^^^^^H
1 1
10 20 30
1
BP
t- ->
, pH =
—
m^^_
30
1
6.3
f\ / m
-24%
-97%
-JOTT" • — -•
40 50 60
BP
6—
NJ
o
Ul
Time in Minutes
-------
- 206 -
NOX SCRUBBING DATA SHEET
DATE: 6-22-72 SCRUB: NH^HSO^ Mixture
OBJECT: Study Influence of Sulfate
3
CONDITIONS: Scrub volume @ 1000 ml Total Gas Flow @ 3200 cm per minute
Pot Temp. 128 °F Initial pH 6.3 Final pH 6.3
H20 10 7. C02 12 % 02 3 %
NO 450 ppm NO. 500 ppm SO- 2860 ppm
COMMENT:
(1) AN02 was 100%; AS02 was 97%; and ANO was 24% after 1
hour.
(2) Ball sticking in the NO meter caused slight fluctuations
in readings.
(3) Scrubbing solution consisted of 11.2 wt.
14.6 wt. % (NH4)2S03, 16.6 wt. % (NH4)2 S04, and
57.6 wt. % water. Specific gravity was 1.24.
(4) Presence of sulfate had no discern able effect.
NO: Na2S03—^ Dry Ice —^ NDIR
-------