Re: PM Speciation and SO3

Don_Shepherd to: Michael Feldman 11/01/2010 09:38 AM

Cc: Elizabeth.Kuehn

History: This message has been forwarded.

5 attachments

revised SJGS #2 Dry-Bottom PC w FGD+FF PM speciation profile.xlsx

revised SJGS #3 Dry-Bottom PC w FGD+FF PM speciation profile.xlsx

revised SJGS #1 Dry-Bottom PC w FGD+FF PM speciation profile.xlsx

revised SJGS #4 Dry-Bottom PC w FGD+FF PM speciation profile.xlsx

SJGS #1 Dry-Bottom PC w FGD+FF PM speciation profile.xls

Michael,

Thanks for catching my errors--here are the revised PM workbooks for

SJGS--changes are in orange:

(See attached file: revised SJGS #2 Dry-Bottom PC w FGD+FF PM speciation

profile.xlsx)(See attached file: revised SJGS #3 Dry-Bottom PC w FGD+FF PM

speciation profile.xlsx)(See attached file: revised SJGS #1 Dry-Bottom PC w

FGD+FF PM speciation profile.xlsx)(See attached file: revised SJGS #4

Dry-Bottom PC w FGD+FF PM speciation profile.xlsx)

Don Shepherd

National Park Service

Air Resources Division

12795 W. Alameda Pkwy.

Lakewood, CO 80228

Phone: 303-969-2075

Fax: 303-969-2822

E-Mail: don_shepherd@nps.gov

 

 Feldman.Michael@e 

 pamail.epa.gov 

 To 

 10/29/2010 10:31 Don_Shepherd@nps.gov 

 AM cc 

 

 Subject 

 Re: PM Speciation and SO3 
 

Don - I am attaching a spreadsheet that you put together for the San Juan

Generating Station. I have some questions about the factors used in the

EPRI calculation. Specifically the F2 factors for the SO3 from the boiler

and from the SCR. The other worksheets for the other units are available

at http://www.nmenv.state.nm.us/aqb/reghaz/Regional-Haze_index.html

Please give me a call when you have a moment to discuss this.

Thank you,

Michael Feldman

Environmental Engineer

Air Planning Section

U.S. EPA Region 6, 6PD-L

Phone: 214-665-9793

feldman.michael@epa.gov

 

 From: Don_Shepherd@nps.gov 

 To: Michael Feldman/R6/USEPA/US@EPA 

 Cc: Dean_Gillam@fws.gov 

 Date: 10/20/2010 11:47 AM 

 Subject: Re: PM Speciation and SO3 

Michael,

I am attaching a modified version of our PM speciation workbook for

dry-bottom boilers to incorporate the EPRI spreadsheets for estimating

H2SO4. (There is no need to adjust the condensible inorganic PM in this

case because AP-42 already gives us the 80/20 split between inorganic and

organic condensible PM for unscrubbed EGUs.) In this case, i entered the

coal data shown below, but left the heat input at the 1,000 mmBtu/hr

default--that does not affect the PM speciation profile, but it does affect

the actual emission rates (lb/hr), so you will need to enter heat input for

each unit. I assumed that all units had cold-side ESPs, so the penetration
factor became 0.73. This penetration factor decreases the amount of H2SO4

released from the boiler, but does not affect the amount of inorganic and

organic condensibles because that is already accounted for in the AP-42

emission factor. If you do want to know how much of the inorganic

condensible PM is H2SO4, that can be found in cell B25 of the "Calculate"

tab.

(See attached file: Mofdified Dry-Bottom PC w ESP PM speciation

profile.xlsx)

The amount of H2SO4 emitted should always be less than the amount of

inorganic condensible PM because H2SO4 is a subset of inorganic condensible

PM.

Don Shepherd

National Park Service

Air Resources Division

12795 W. Alameda Pkwy.

Lakewood, CO 80228

Phone: 303-969-2075

Fax: 303-969-2822

E-Mail: don_shepherd@nps.gov

 Feldman.Michael@e

 pamail.epa.gov

 To

 10/19/2010 01:44 don_shepherd@nps.gov

 PM cc

 Subject

 PM Speciation and SO3

Don - The summary below is information on the calculations for PM and

H2SO4 performed by Trinity Consultants for OG&E and AEP. This summary is

based on the information in the attached documents that were submitted to

ODEQ as part of their BART Application. Please let me know your thoughts

on their calculations and the proposed use of the EPRI method and the

factors given in the table below. The EPRI method yields SO3 emissions

much lower than calculated with the NPS speciation worksheets. Please

give me a call to discuss or if you have any questions.

Thank you,

Michael Feldman
Oklahoma CALPUFF modeling for OG&E Sooner and Muskogee and AEP Northeastern

units.

CALPUFF Emission assumptions:

1) OG&E assumed 1% conversion of SO2 to SO3 across the boiler and

calculated PM10 speciation using NPS Speciation AP-42 spreadsheets (

http://www.nature.nps.gov/air/permits/ect/ectCoalFiredBoiler.cfm). The

speciation worksheet was used to obtain the fractions of PM emissions that

are SO3, Coarse, Fine, EC, and SOA. Inorganic condensable PM was assumed

to be SO3 and this amount was added to the SO4 calculated from the 1%

conversion across the boiler. OG&E used the NPS speciation worksheet for

wet bottom boilers with ESP for all control scenarios. The Sooner and

Muskogee units are dry bottom with ESP. Furthermore, OG&E did not input

the necessary coal quality (heating value, % sulfur, % ash), and heat input

needed to calculate the correct PM speciation from the NPS worksheets and

just used the default values of 10000 Btu/lb coal with 1% S and 10% ash.

2) For AEP Northeastern, the speciation worksheet was used to obtain

the fractions of PM emissions that are SO3, Coarse, Fine, EC, and SOA.

Inorganic condensable PM was assumed to be SO3. AEP used the dry bottom

ESP NPS worksheet, but did not input the necessary coal quality (heating

value, % sulfur, % ash), and heat input needed to calculate the PM

speciation from the NPS worksheets and just used the default values of

10000 Btu/lb coal with 1% S and 10% ash. In addition, SO4 from SO2 was

calculated based on an assumption of 3ppm in the flue gas.

We propose to use the EPRI method to calculate H2SO4 and account for

removal by the downstream equipment. The NPS speciation worksheets will be

used to calculate PM emissions by size (PM8, PM4.25, PM1.88, PM1.25,

PM0.813, PM0.625). (These species will be converted to PMC, PMfine, EC and

SOA in postutil).

|-----------------------------------------------------------+-------------|

| EPRI method parameter | value |

|-----------------------------------------------------------+-------------|

| Worst case Sulfur | 0.48% |

|-----------------------------------------------------------+-------------|

| Worst case Ash | 7.5% |

|-----------------------------------------------------------+-------------|

| Heating value | 8000 Btu/lb |

|-----------------------------------------------------------+-------------|

| F1 (Fuel Impact Factor, subbituminous/PRB all boilers) | 0.0019 |

|-----------------------------------------------------------+-------------|

| F2 (Technology Impact factors): | |

|-----------------------------------------------------------+-------------|

| Air Heater (PRB)| 0.36 |

|-----------------------------------------------------------+-------------|

| Cold-side ESP (PRB)| 0.72 |

|-----------------------------------------------------------+-------------|

| Wet spray tower (PRB)| 0.4 |

|-----------------------------------------------------------+-------------|

| Dry FGD and baghouse| 0.01 |

|-----------------------------------------------------------+-------------|
Michael Feldman

Environmental Engineer

Air Planning Section

U.S. EPA Region 6, 6PD-L

Phone: 214-665-9793

feldman.michael@epa.gov(See attached file:

OG&E_Sooner_BART_Emission_summary.pdf)(See attached file:

AEP-PSO_Northeast_BART_Emission_summary.pdf)(See attached file:

OG&E_Muskogee_BART_Emission_summary.pdf)[attachment "Mofdified Dry-Bottom

PC w ESP PM speciation profile.xlsx" deleted by Michael

Feldman/R6/USEPA/US] [attachment "OG&E_Sooner_BART_Emission_summary.pdf"

deleted by Michael Feldman/R6/USEPA/US] [attachment

"AEP-PSO_Northeast_BART_Emission_summary.pdf" deleted by Michael

Feldman/R6/USEPA/US] [attachment "OG&E_Muskogee_BART_Emission_summary.pdf"

deleted by Michael Feldman/R6/USEPA/US]

(See attached file: SJGS #1 Dry-Bottom PC w FGD+FF PM speciation

profile.xls)