GmaH - catalyst tests

G~:;il

catalyst tests

4 messages

Page 1 of 4

Phyllis Fox <phyllisfox@gmall.com>

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

To: Flemming Hansen <fgh@topsoe.com>

This paper would suggest that SCR is not viable on lignite or PRS coals, but, of course, this is not true.

Haldor was one of the sponsors of this study.

Have there been advances in SCR technology to address the plugging and fouling described in this paper?

Or was the study flawed 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 14,2008 at 6:05 PM

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 if we can get it done before the

construction begins.

Let me know if you have other questions.

Flemming G. Hansen

Manager SCR DeNOx Catalyst

Haldor Topsoe, 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

https://mail.google.com/mail!?ui=2&ik=8f1e6tb616&view=pt&q=catalyst%20tests&qS=lr... 2/11/2011
Gmail - catalyst tests

'!'I'll Lignite SCR Fuel Process Tech 2005.pdf

\Q 3297K

Phyllis Fox <phylllsfox@gmall.com>

To: Flemming Hansen <FGH@topsoe.com>

Page 2 of 4

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 if we can get it done before the

construction begins.

Let me know if you have other questions.

Flemming G. Hansen

Manager SCR OeNOx Catalyst

Haldor Topsoe, 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 catalyst tests

This paper would suggest that SCR is not viable on lignite or PRS coals, but, of course, this

is not true.

Haldor was one of the sponsors of this study.

Have there been advances in SCR technology to address the plugging and fouling

described in this paper?

Or was the study flawed in some way?

hllps://maiLgoogle.com/maill?ui=2&ik=8f1e6tb616&view=pt&q=catalyst%20tests&qs=tr... 2/11/2011
Gmail - calalysllesls

Phyllis

Flemming Hansen <FGH@topsoe.com>

To: Phyllis Fox <phyllisfox@gmail.com>

Page 3 of 4

Tue, Jan 15,2008 at 10:17 AM

I believe that when 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 of ash 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 not very scientific, but is a general observation from tests.

Flemming G. Hansen

Manager SCR DeNOx Catalyst

Haldor Topsoe. 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

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 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 if you have other questions.

Flemming G. Hansen

Manager SCR DeNOx Catalyst

Haldor Topsoe. Inc.

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

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 catalyst tesls

Page 4 of 4

This paper would suggest that SeR is not viable on lignite or PRS coals, but, of course, this

is not true.

Haldor was one of the sponsors of this study.

Have there been advances in SeR technology to address the plugging and fouling

described in this paper?

Or was the study flawed in some way?

Phyllis

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