### GmaH
- catalysttests

# G~:;il catalyst tests 4 messages 

### Page 1 of4
Phyllis Fox <phyllisfox@gmall.com>

Sat, Jan 12,2008 at 10:27AM Phyllis Fox <phyllisfox@gmail.com> 

### To: Flemming Hansen <fgh@topsoe.com>

This paperwould suggestthat SCR is notviable on lignite or PRS coals, but, ofcourse, this is nottrue. Haldorwas one ofthe sponsors ofthis study. Have there been advances in SCR technology to addressthe plugging and fouling described in this paper? Orwas the studyflawed in some way? Phyllis 

### "'_' Lignite 

### SeR Fuel Process Tech 2005.pdf 

### u 3297K Flemming Hansen <FGH@topsoe.com> 

### To: Phyllis Fox <phyllisfox@gmail.com> Mon, Jan 14,2008at6:05 PM



### Phyllis, We haven'tdone any moretesting since then on lignite coals. That testwas on NO lignite. As seen on the picture the catalyst got covered in fly ash. This is unfortunatelya problem when testing is done in a small reactor. In afull scale reactor Iwouldn't expect ash to fall on the catalyst in this way. We have sold catalystto operate on Texas lignite. Atest may be done ifwe can get it done before the construction begins. Let me know ifyou have other questions. Flemming G. Hansen Manager SCR DeNOx Catalyst HaldorTopsoe, Inc. 281-228-5120 (office) 281-228-5129 (fax) 281-684-8820 (cell) FGH@Topsoe.com www.topsoe.com "Phyllis Fox" <phyllisfox@gmail.com> 01/12/200809:27 AM
IQuoted lext hiddenl To "Flemming Hansen" <fgh@topsoe.com> cc Subject catalyst lests



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### Lignite SCR Fuel Process Tech 2005.pdf \Q 3297K 

### Phyllis Fox <phylllsfox@gmall.com> To: Flemming Hansen <FGH@topsoe.com> 

### Page 2of4

Mon, Jan 14, 2008 at 6:46 PM Why would the catalyst be covered with ash in a small reactor, but not a large one, velocity, edge effects?

On Jan 14, 2008 3:05 PM, Flemming Hansen <FGH@topsoe.com> wrote:

Phyllis, We haven't done any more testing since then on lignite coals. That test was on NO lignite. As seen on the picture the catalyst got covered in fly ash. This is unfortunately a problem when testing is done in a small reactor. In a full scale reactor I wouldn't expect ash to fall on the catalyst in this way. We have sold catalyst to operate on Texas lignite. A test may be done ifwe can get it done before the construction begins. Let me know ifyou have otherquestions. Flemming G. Hansen Manager SCR OeNOx Catalyst HaldorTopsoe, Inc. 281-228-5120 (office) 281-228-5129 (fax) 281-684-8820 (cell) FGH@Topsoe.com www.topsoe.com

•Phyllis Fox· <phvllisfox@gmall,com> 01/12/200809:27 AM To 'Flemming Hansen' <fgh@topsoe.com> cc Subject catalysttests



### This paperwould suggestthat SCR is not viable on lignite or PRS coals, but, of course, this is nottrue. Haldorwas one ofthe sponsors ofthis study. Have there been advances in SCR technology to address the plugging and fouling described in this paper? Orwas the studyflawed in some way?


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## Phyllis Flemming Hansen <FGH@topsoe.com> To: Phyllis Fox <phyllisfox@gmail.com> 

### Page 3 of4

Tue, Jan 15,2008 at 10:17AM

I believe thatwhen everything becomes more compact you are more sensitive to wall cooling, shorter distances between turns and supports and ammonia injection. That doesn't mean that ash couldn't build up on a full scale SCR as well, but instead of a foot in distance between the turning vane and the catalyst it may be 20 feet. A lot ofash problems arise because the ash is not hitting the catalyst channels parallel but at an angle. The lee side will build up ash. This is notvery scientific, but is a general observation from tests. Flemming G. Hansen Manager SCR DeNOx Catalyst HaldorTopsoe. Inc. 281-228-5120 (office) 281·228·5129 (fax) 281-684-8820 (cell) FGH@Topsoe.com www.topsoe.com ·Phyllis Fox· <phyllisfox@gmall.com> 01/14/200805:46 PM To "Flemming Hansen" <FGH@topsoe.com> cc Subject Ae: catalyst tests


## Whywould the catalyst be covered with ash in asmall reactor, but nota large one, velocity, edge effects?

On Jan 14, 2008 3:05 PM, Flemming Hansen <FGH@topsoe.com> wrote: Phyllis, We haven't done any more testing since then on lignite coals. That test was on ND lignite. As seen on the picture the catalyst got covered in fly ash. This is unfortunately a problem when testing is done in a small reactor. In a full scale reactor I wouldn't expect ash to fall on the catalyst in this way. We have sold catalyst to operate on Texas lignite. A test may be done if we can get it done before the construction begins. Let me know ifyou have otherquestions. Flemming G. Hansen Manager SCR DeNOx Catalyst HaldorTopsoe. Inc. 

### https://mail.google.com/mail!?ui=2&ik=8fle6tb616&view=pt&q=calalyst%201ests&qs=tr... 2/11/2011

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281-228-5120 (office) 281-228-5129 

### (fax) 281-684-8820 (cell) FGH@Topsoe.com www.topsoe.com ·Phyllls Fox' <phylllsfox@gmail.com> 01/12/200809:27 AM To "Flemming Hansen' <fgh;ti>lopsoe.com> cc Subject catalysttesls 

### Page 4 of4



### This paperwould suggestthat 

## SeR is not viable on lignite or 

## PRS coals, but, of course, this is nottrue. Haldorwas one ofthe sponsors ofthis study. Have there been advances in 

## SeR technologyto address the plugging and fouling described in this paper? Orwas the studyflawed in some way? Phyllis

hftps://mail.googlc.com/maill?ui=2&ik=8f1e6fb616&vicw=pt&q=catalyst%20tests&qs=tr... 2/11/2011