7-13 Air

Please clarify whether an alternate calculation methodology was used for estimating potential Acrolein emissions from the CT when using NG.

7-13     Table 2 shows Acrolein potential emissions at 6.1-lb/yr for the Combustion Turbines (CT) when using Natural Gas (NG).  Table A-2 lists the Acrolein emission factor (EF) as 6.4E-06-lb/MMBtu for the CT when using NG.  Table A-2 also lists a Maximum Unit Heat Input of 3,393-MMBtu/hr, an Annual Operation value of 8,040-hr/yr, and an Acrolein control efficiency of 90% for the CT when using NG.  Using the basic calculation methodology shown below, annual Acrolein potential emissions are estimated to be 34.9-lb/yr.  Please clarify whether an alternate calculation methodology was used for estimating potential Acrolein emissions from the CT when using NG.

(Acrolein EF) * (Max Unit Heat Input) * (Annual Operation) * (1- Control Efficiency) * (# CT)
( 6.4E-06-lb/MMBtu ) * ( 3,393-MMBtu/hr ) * ( 8,040-hr/yr ) * ( 1 – 0.90 ) * ( 2 CT )
( 0.021715-lb/hr ) * ( 8,040-hr/yr ) * ( 1 – 0.90 ) * ( 2 CT )
( 174.6-lb/yr) * ( 1 – 0.90 ) * ( 2 CT )
( 17.46-lb/yr ) * ( 2 CT )
( 34.9-lb/yr )

RESPONSE 7-13

 

The potential emissions of acrolein from the combustion turbines while firing natural gas will be 35 pounds per year, as listed in Table A-2 and calculated using the same calculation methodology detailed above. 

 

RESPONDENT:

 

Michael Feinblatt, ESS Group, Inc.

 

DATE:

May 17, 2016