DEQ-CFW_00087996

•
•
' Vinyl Eshers South
Air Emissions Inventory
Maintenance Emissions
Page 1 of 3
2004 Maintenance Emission Determination
A. Background
Periodically, vessels in the VE-South Plant are emptied for campaign switches and maintenance activity.
Periodically, the process vessels in the VE-South plant are emptied for campaign switches and for
maintenance. During the deinventory process, the liquid is transferred to another process vessel and then
the gases are evacuated to the division waste gas scrubber. The amount of gasses from the PAF column,
the condensation reactor, stripper column and low boiler column are already included in the vent flowmeter
readings used to calculate emissions in previous sections. This section estimates maintenance emissions for
the rest of the major process vessels.
B. Condensation Tower
Assume:
a) void fraction in distillation columns is 40%
b) ideal gas behavior
c) vessels are at atmospheric pressure
d) ambient temperature (25 deg C)
e) gasses are 90% acid fluorides and 10% non-acid Fluorides
f) average MW for acid fluoride component based on the respective acid fluoride for each
campaign multiplied by the percentage of the total operating hours for each campaign = 250
g) average MW for non-acid fluoride component = 150 (assumed to be HFP)
h) number of deinventory events during the year = 3
List of Process Vessels
Condensation Tower
Volume
ft''
Volume
al
Reactor Decanter
9
70
A/F Column
5
37
A/F Decanter
2
16
A/F Overhead Receiver
25
184
Total Volume
41
306
VOC Emissions
n = PV/RT, where P = 14.7 psia R = 10.7 psia-ft3/lb-mol degR
V = 41 ft3 T = 537 degrees R
n = PV _ 14.7 psia 41 ft3 _ 0.10 lb-mol gas
RT 10.73 psia-ft x 537 degR deinventory event
Ibmol-degR
0.10 lb-mol gas x 3 deinventory events = 0.31 lb-mol gas
deinventory event year year
0.31 lb-mol gas x 10% non-A/F x 150 lb non A/F = 4.7 lb non-A/F
year lb-mol gas = 4.7 lb VOC
Before -control A/F vented from Condensation:
0.31 lb-mol gas x 90% A/F
year
x 250 lb A/F = 70 lb A/F
lb-mol gas
DEQ-CFW 00087996

'Vinyl Ethers South Air Emissions Inventory Maintenance Emissions
Page 2 of 3
After -control emissions utilizing the 99.6% control efficient Waste Gas Scrubber (WGS):
70 lb A/F
Waste Gas Scrubber x (100%-99.6%) control efficiency
= 0.28 lb A/F = 0.28 lb VOC
Total VOC Emissions 4.7 lb/yr non-A/F VOC
+ 0.28 lb/yr A/F VOC
5.0 lb VOC
C. Agitated Bed Reactor & Refining
Assume: a) void fraction in distillation columns is 40%
b) ideal gas behavior
c) vessels are at atmospheric pressure
d) ambient temperature (25 deg C)
e) gasses are 100% vinyl ethers
f) average MW for vinyl ethers based on the respective vinyl ether for each campaign
multiplied by the percentage of the total operating hours for each campaign = 186
g) number of deinventory events = 3
HF Potential
Vinyl ethers are VOCs without the potential to form HF
List of Process Vessels
Volume
Volume
Agitated Bed Reactor & Refining
ft'
al
Product Column
8
59
PMVE/PPVE Product Receiver
68
507
Total Volume
i 761
566
VOC Emissions
n = PV/RT, where P = 14.7 psia
V = 76 ft3
n = PV = 14.7 psia x
RT 10.73 psia-ft3/Ibmol/R x
R = 10.7 psia-ft3/lb-mol degR
T = 537 degrees R
76 ft3 = 0.19 lb-mol gas
537 R deinventory event
0.19 lb-mol gas x 3 deinventory events = 0.58 lb-mol gas
deinventory event year year
VOC Emissions from ABR & Refining
0.58 lb mol x 186 lb VOC = 108 lb VOC
lb-mol VOC
DEQ-CFW 00087997

•
•
•
Vinyl Ethers South
W
E.
Total Maintenance Emissions
Air Emissions Inventory
Emission Source
Emission
lb VOC
Condensation Tower
5
Agitated Bed Reactor & Refining
108
Total Maintenance Emissions
113
Speciated Maintenance Emissions Summary
Maintenance Emissions
Page 3 of 3
Nafion(b
PM/PE
Emissions
lbs
PMVE
Emissions
lbs)
PPVE
Emissions
lbs
Total
Emissions
lbs
Stack
Maint.
Stack
Maint.
Stack
Maint.
Stack
Maint.
PAF
181
1.6
248
2.1
0
0
429
4
PMPF
189
1.6
1 329
2.8
0
0
518
4
PEPF
794
6.9
0
0.0
0
0
794
7
PPF
0
0.0
0
0.0
0
0
0
0
PMVE
1
0.0
0
0.0
0
0
1
0
PEVE
0
0.0
0
0.0
0
0
0
0
PPVE
0
0.0
0
0.0
0
0
0
0
HFP
7,211
62.2
1,261
10.9
0
0
8,472
73
TFE
1,534
13.2
135
1.2
0
0
1,669
14
HFPO
0
0.0
0
0.0
0
0
0
0
C4
0
0.0
0
0.0
0
0
0
0
C5
0
0.0
0
0.0
0
0
0
0
COF2
932
8.0
245
2.1
0
0
1,178
10
TOTAL
10,842
94 1
2,217
19
0
0
13,060
113
Note: Speciated maintenance emissions were estimated by assuming that each compound's emission
concentration from maintenance activities was equal to that compound's stack emission fraction
of the total stack emission. For example, the stack emission of PAF from the PM/PE process
was 130 lb., with the total stack emission from the Vinyl Ethers South processes being
13,877 pounds. The total maintenance emissions were 150 pounds.
Therefore, the PAF maintenance emissions from the PE/PM process were determined by:
181 lb. PAF x 113 lb. Total maintenance emissions = 1.6 lb. PAF
13,060 lb. Total stack emmisions
DEQ-CFW 00087998