DEQ-CFW_00087290

2005 EMISSIONS AIR INVENTORY
SECTION D - FORM D6
ENGINEERING ANALYSIS TO SUPPORT PERMIT APPLICATION
Emission Unit ID: BS-1
Emission source Description: Butyraldehyde Storage Tank
A. Emission Estimation Ap rp oach
Emissions from this unit are based on EPA Publication AP-42 (using EPA -
developed Tanks 2.0 software). Actual working losses are zero because when being
loaded, the tank is vented back to the railcar. Breathing losses are calculated form
the ambient temperature changes in the tank, and are controlled by an 70% efficient
brine cooled condenser. Thus control on working losses is 100% and control on
breathing losses is 70%, and as shown by the calculations below, this gives an
overall control efficiency of approximately 92 — 94%.
Actual Emission Calculations
BA (Breathing Losses) to Condenser 2482 Lbs. / year
Uncontrolled Working Losses 1 (Actual 2001) 7438 Lbs. / year
Uncontrolled Working Losses 1 (Potential) 9905
Total Uncontrolled Emissions 2 (Actual 2001) 9920 Lbs. / year
Total Uncontrolled Emissions 2 (Potential) 12387 Lbs. / year
Vapor Pressure 3 at 71.37 °F (21.87 °C) 1.844 Psi
Vapor Pressure 3 at 32 °F (0 °C) 0.558 Psi
Condenser efficiency 4 70% Or greater
BA Emissions From Condenser 5 (Annual) 751 Lbs. / year
BA Emissions From Condenser 5 (Hourly Average) 0.086 Lbs. / hour
Actual Working Loss Emissions 0 Lbs. / year
Overall Control Efficiency 6 (Based on Actual 2001 Emissions) 92% Or greater
Overall Control Efficiency 6 (Based on Potential Emissions) 94% Or greater
DEQ-CFW 00087290

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SECTION D - FORM D6
ENGINEERING ANALYSIS TO SUPPORT PERMIT APPLICATION
Emission Unit ID:
Emission source Description:
Note:
BS-1
Butyraldehyde Storage Tank
1. Actual 2005 uncontrolled working losses based on 34 turnover.
Potential uncontrolled working losses based on 95 turnovers.
2. Total uncontrolled emissions equal breathing losses plus working losses.
3. Vapor pressure calculated using Antoine Equation
Logp*(T°C) = A—[B/(T°C +C)]
Where p* = vapor pressure
A = 6.3854
B = 913.590
C = 185.480
4. Condenser control efficiency is calculated:
1— ( vapor pressure at 32 / vapor pressure at 71.4 }
This is based o the assumption that -the condenser exit temperature will be at 320F
(because of the low flow associated with breathing losses the gas will be completely
chilled to the coolant temperature in the condenser and 32°F is the upper value of the
condenser temperature; 71.37°F is the average surface temperature in the BA storage
tank - See Tanks 2.0 Output).
5. Emissions from condenser calculated as: Uncontrolled BA to condenser x (1—
control efficiency)
Hourly emissions calculated by dividing annual emissions by 8760.
6. Overall Control Efficiency = 1— [ ( annual breathing losses from condenser +
actual working loss emissions) / total uncontrolled
emissions ]
DEQ-CFW 00087291