公开(公告)号：US20210362140A1

公开(公告)日：2021-11-25

申请号：US16630105

申请日：2018-07-09

Applicant: SHELL OIL COMPANY

Inventor： Wenzhong ZHANG ,  Geert Marten BANKKER ,  Steven Russell LEE

IPC: B01J29/80 ,  B01J29/76 ,  B01J37/30 ,  B01J35/10 ,  B01J35/02 ,  B01D53/86 ,  B01D53/94

Abstract: A catalyst for the conversion of NOX comprising iron chabazite and iron beta zeolite and a method of reducing the NOX concentration in a process gas stream comprising contacting the process gas stream with the catalyst. The catalyst is especially useful for high temperature deNOX conversion.

公开(公告)号：US20190001266A1

公开(公告)日：2019-01-03

申请号：US16064169

申请日：2016-12-20

Applicant: SHELL OIL COMPANY

Inventor： Guido SENG ,  Wassim KLINK ,  Wenzhong ZHANG ,  Andreas KLEMT ,  Paul Benjerman HIMELFARB

IPC: B01D53/86

Abstract: A catalyst bed comprising a ceramic or metallic foam comprising one or more NOx reduction catalysts is described. Further, a method for reducing the concentration of NOx in a dust containing gas stream comprising: a) passing a first gas stream containing NOx into a contacting zone; b) contacting the first gas stream with a ceramic or metallic foam catalyst bed having one or more flow paths through the catalyst bed wherein the ceramic or metallic foam comprises a NOx reduction catalyst to produce a second gas stream with a reduced NOx concentration; and c) passing the second gas stream out of the contacting zone wherein the first gas stream has a dust concentration of at least 5 mg/Nm3 and the second gas stream comprises at least 50% of the amount of dust in the first gas stream.

公开(公告)号：US20180369753A1

公开(公告)日：2018-12-27

申请号：US16064200

申请日：2016-12-20

Applicant: SHELL OIL COMPANY

Inventor： Wassim KLINK ,  Guido SENG ,  Wenzhong ZHANG ,  Andreas KLEMT ,  Paul Benjerman HIMELFARB

IPC: B01D53/86 ,  F01N3/28 ,  B01J35/04 ,  B01J21/16 ,  B01J23/22 ,  B01J23/28 ,  B01J23/30

Abstract: A reactor for reducing the concentration of NO x in a stream comprising: an inlet for the stream; an outlet for a stream containing a reduced concentration of NOx; one or more catalyst beds comprising a ceramic or metallic foam with a NOx reduction catalyst; one or more flow paths from the inlet to the outlet that passes through at least one catalyst bed wherein the catalyst beds are closed at the top and bottom so that the flow path through the catalyst bed passes through the sides of the catalyst bed in a lateral flow is described.

公开(公告)号：US20220111334A1

公开(公告)日：2022-04-14

申请号：US17466206

申请日：2021-11-22

Applicant: SHELL OIL COMPANY

Inventor： Wassim KLINK ,  Guido SENG ,  Wenzhong ZHANG ,  Andreas KLEMT ,  Paul Benjerman HIMELFARB

IPC: B01D53/86 ,  B01D53/94 ,  B01J21/16 ,  B01J23/22 ,  B01J23/28 ,  B01J23/30 ,  B01J35/04 ,  F01N3/28

Abstract: A reactor for reducing the concentration of NOx in a stream comprising: an inlet for the stream; an outlet for a stream containing a reduced concentration of NOx ; one or more catalyst beds comprising a ceramic or metallic foam with a NOx reduction catalyst; one or more flow paths from the inlet to the outlet that passes through at least one catalyst bed wherein the catalyst beds are closed at the top and bottom so that the flow path through the catalyst bed passes through the sides of the catalyst bed in a lateral flow is described.

公开(公告)号：US20210178371A1

公开(公告)日：2021-06-17

申请号：US16630043

申请日：2018-07-09

Applicant: SHELL OIL COMPANY

Inventor： Steven Russell LEE ,  Wenzhong ZHANG ,  Geert Marten BAKKER

IPC: B01J29/80 ,  B01J29/76 ,  B01J35/10 ,  B01J35/02 ,  B01D53/94

Abstract: A catalyst for the conversion of NOX and N2O comprising iron chabazite and iron beta zeolite. A method of simultaneously reducing the NOX and N2O concentration in a process gas stream comprising contacting the process gas stream with a catalyst comprising iron chabazite and iron beta zeolite under conversion conditions.

公开(公告)号：US20190240620A1

公开(公告)日：2019-08-08

申请号：US16335461

申请日：2017-09-25

Applicant: SHELL OIL COMPANY

Inventor： Wenzhong ZHANG ,  Geert Marten BAKKER ,  Steven Russell LEE

IPC: B01D53/96 ,  B01D53/86 ,  B01J38/06 ,  B01J38/02 ,  B01J23/22 ,  B01J23/92

CPC classification number: B01D53/96 ,  B01D53/8625 ,  B01D2251/2062 ,  B01D2255/20723 ,  B01D2257/404 ,  B01D2258/0283 ,  B01J23/22 ,  B01J23/90 ,  B01J23/92 ,  B01J35/04 ,  B01J38/02 ,  B01J38/06 ,  B01J38/12

Abstract: The invention provides a method for regenerating a deNOX catalyst comprising contacting the catalyst with steam at a temperature in the range of from 250 to 390° C. The invention further provides a method of reducing the amount of nitrogen oxide components in a process gas stream comprising: a) contacting the process gas with a deNOX catalyst which results in the conversion of nitrogen oxide components as well as a decline in the NOX conversion over the deNOX catalyst; and b) regenerating the deNOX catalyst to improve the NOX conversion by contacting the deNOX catalyst with steam at a temperature in the range of from 250 to 390° C.

公开(公告)号：US20190282959A1

公开(公告)日：2019-09-19

申请号：US16335399

申请日：2017-09-25

Applicant: SHELL OIL COMPANY

Inventor： Wenzhong ZHANG ,  Geert Marten BAKKER

IPC: B01D53/96 ,  B01D53/86 ,  B01J38/08 ,  B01J21/06 ,  B01J23/30 ,  B01J23/28 ,  B01J23/22 ,  B01J21/20 ,  B01J23/92

Abstract: The invention provides a method of reducing the amount of nitrogen oxide components in a process gas stream comprising: a) contacting a deNOX catalyst with the process gas in the presence of ammonia which results in the conversion of nitrogen oxide components as well as a decline in the NOX conversion over the deNOX catalyst; and b) regenerating the deNOX catalyst to improve the NOX conversion by contacting the deNOX catalyst at a temperature in the range of from 250 to 390° C. with a flow of ammonia that is reduced relative to the flow of ammonia in step a) and process gas, air or a mixture thereof.

公开(公告)号：US20180369800A1

公开(公告)日：2018-12-27

申请号：US16064240

申请日：2016-12-20

Applicant: SHELL OIL COMPANY

Inventor： Wassim KLINK ,  Guido SENG ,  Wenzhong ZHANG ,  Andreas KLEMT ,  Paul Benjerman HIMELFARB

IPC: B01J35/04 ,  B01J37/00 ,  B01J21/16 ,  B01J21/06 ,  B01J21/04 ,  B01J23/745 ,  B01J23/755 ,  B01J23/22 ,  B01J23/28 ,  B01J23/30 ,  B01D53/86

Abstract: A catalyst bed comprising a ceramic or metallic foam comprising one or more NOx reduction catalysts is described. A method for reducing the concentration of NOx in a dust containing gas stream comprising: a) passing a first gas stream containing NOx into a contacting zone; b) contacting the first gas stream with a ceramic or metallic foam catalyst bed having one or more flow paths through the catalyst bed wherein the ceramic or metallic foam comprises a NOx reduction catalyst to produce a second gas stream with a reduced NOx concentration; and c) passing the second gas stream out of the contacting zone wherein the first gas stream has a dust concentration of at least 5 mg/Nm3 and the pressure drop of the foam catalyst bed increases by 300% or less relative to the initial pressure drop of the foam catalyst bed due to dust accumulation, measured under the same conditions is also described.