2014 Emissions Inventory Workshop How to Calculate Your Emissions CO VOC E = A × EF PM NOx 2000 lb/ton

Emissions Inventory Workshop General Equation For most emission sources the following equation is used: E = A * EF Where E = Calculated emissions A = Activity or annual process rate EF = Emission factor - determined by the method of calculation Example sources: AP-42 WebFire Permit

Process: mmbtu/hr boiler SCC: Fuel:Natural Gas Capacity:84 mmbtu/hr Control:Uncontrolled Emissions Inventory Workshop

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E = A * EF = ??? tons Emissions Inventory Workshop A EF E Convert to tons:

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Process:2 - Cycle Lean Burn Natural Gas Engine SCC: Fuel:Natural Gas Capacity:1100 hp Control:Uncontrolled Emissions Inventory Workshop

Emissions Inventory Workshop US EPA CHIEF Website:

Emissions Inventory Workshop

Emissions Inventory Workshop

Emissions Inventory Workshop

Emissions Inventory Workshop

Emissions Inventory Workshop

E = A * EF = ??? tons Emissions Inventory Workshop A EF E Convert to tons:

Emissions Inventory Workshop

Process: Reciprocating emergency generator SCC: Fuel:Diesel Capacity:400 hp Pollutant: NOx Factor:604 lbs/1000 gal Control:Uncontrolled Operation:50 hours Activity:500 gal Heat Content:137 mmbtu/1000 gal Emissions Inventory Workshop

E = A * EF = ??? tons Emissions Inventory Workshop A EF E Convert to tons:

Process:Surface coating – spray painting SCC: Pollutant:Xylene, VOC (non-HAP) Paint:Acrylic Red Emissions Inventory Workshop

Emissions Inventory Workshop

E = A * VOC Content * (Xylene:VOC Ratio) = ??? tons Emissions Inventory Workshop Now, for non-HAP VOC: VOC (non-HAP ) VOC (non-HAP) = Total VOC ̶ Xylene

Process: Pneumatic Controllers: High Bleed SCC: Pollutant:VOC Bleed Rate:32.1 scf/hr whole gas Emissions Inventory Workshop

E = Gas Vented * VOC Content = ??? tons Emissions Inventory Workshop VOC = 1406 MscfVOC = = 1406 Mscf Gas MW = 9,284 lb

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Capture Efficiency: The percentage of air emission that is collected and routed to the control equipment. Most control devices have a 100% capture efficiency. Control Efficiency: The percentage of air pollutant that is removed from the air stream by the control device Emissions Inventory Workshop

Process:Primary Crushing SCC: Pollutant:PM10 Control:Water Spraying Emissions Inventory Workshop

Emissions Inventory Workshop

E = A * EF * (1 – Control Efficiency) = ??? tons Emissions Inventory Workshop A EF E Account for control: Convert to tons:

Process:Grain handling for feed manufacture SCC: Activity:10,000 tons Pollutant:PM 10 Factor: 3 lbs/ton Primary Control:Cyclone Secondary Control:Baghouse Emissions Inventory Workshop

Emissions Inventory Workshop A Complex Situation: Capture Efficiency, Primary Efficiency & Secondary Efficiency

Capture Device: Hood Therefore, the other 10% is emitted directly to the atmosphere Secondary control device: Baghouse The control equipment removes 98% of PM 10 from the emission stream Emissions Inventory Workshop Primary control device: Cyclone The control equipment removes 80% of PM 10 from the emission stream.

Total E = Captured E + Uncaptured E = ??? tons Emissions Inventory Workshop Captured E = A * EF * CE * (1 – PE) * (1 – SE) Uncaptured E = A * EF * (1 – CE)

Captured E = A * EF * CE * (1 – PE) * (1 – SE) Emissions Inventory Workshop AEF Account for capture and controls: CE PE SE

Uncaptured E = E * (1 – CE) Emissions Inventory Workshop Account for all PM 10 emissions: Convert to tons:

30,000 lbs of PM generated 1 3,000 lbs of PM emitted “not captured” 2 27,000 lbs of PM “captured”, sent to cyclone 3 4 Amount to Hopper 27,000 lbs* 0.80 = 21,600 lbs 5 27,000 lbs– 21,600 lbs = 5,400 lbs to the Baghouse Amount emitted to the atmosphere 5,400 lbs – 5,292 lbs = 108 lbs 108 lbs stack emissions + 3,000 lbs “not captured,” emitted as a fugitive = 3,108 lbs = tons 7 6 Amount to Hopper 5,400 lbs * 0.98 = 5,292 lbs Emissions Inventory Workshop

If you would like to see an example calculation for another industry, process, or control equipment not presented today: Please and we will create an example for you Emissions Inventory Workshop

Program Manager: Mark Gibbs Emissions Inventory Staff: Cooper Cody Michelle Horn Justin Milton Carrie Schroeder Emissions Inventory Workshop