NDLI: NH$_{3}$-SCR Activity of H-BEA and Fe-BEA After Potassium Exposure

Content Provider	Springer Nature Link
Author	Shwan, Soran Jansson, Jonas Olsson, Louise Skoglundh, Magnus
Copyright Year	2015
Abstract	A previous developed multisite microkinetic model for hydrothermally deactivated H-BEA and Fe-BEA catalyst used for NH$_{3}$-SCR applications has been applied and validated using potassium exposed H-BEA and Fe-BEA samples. The catalysts have been exposed to evaporated aqueous solution of potassium (10 ppm KNO$_{3}$) in a flow-reactor for 14–48 h. The results for the H-BEA samples show an increase in NH$_{3}$-SCR activity after 48 h of potassium exposure. This is correlated to an increase in NO$_{X}$ storage capacity, indicating that potassium forms new NO$_{X}$ storage sites participating in the SCR reaction. However, the Fe-BEA samples show different results. The SCR activity for the Fe-BEA catalyst decreases significantly after 14 h of exposure to potassium and after longer exposure time the activity slightly increases again compared to the sample exposed to potassium for 14 h. When applying the kinetic model to the flow-reactor measurements the model is able to predict the changes in SCR activity well when changing the site density of the active sites. In overall, combining the experimental results with the simulation indicates that exposure to potassium initially chemically blocks the active iron species which decrease with exposure time. Longer time of exposure to potassium indicates that the iron species are exchanged and lost due to formation of new potassium sites in the zeolite resulting in an overall lower SCR activity compared to a fresh Fe-BEA sample.
Starting Page	1012
Ending Page	1018
Page Count	7
File Format	PDF
ISSN	10225528
Journal	Topics in Catalysis
Volume Number	58
Issue Number	14-17
e-ISSN	15729028
Language	English
Publisher	Springer US
Publisher Date	2015-08-11
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Kinetic modeling Potassium Fe-BEA Deactivation Poisoning NH$_{3}$-SCR Catalysis Physical Chemistry Pharmacy Industrial Chemistry/Chemical Engineering Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Influence of Hydrothermal Ageing on NH$_{3}$-SCR Over Fe-BEA—Inhibition of NH$_{3}$-SCR by Ammonia

Alkali Resistant Fe-Zeolite Catalysts for SCR of NO with NH$_{3}$ in Flue Gases

Combination of Ag/Al$_{2}$O$_{3}$ and Fe-BEA for High-Activity Catalyst System for H$_{2}$-Assisted NH$_{3}$-SCR of NO$_{ x }$ for Light-Duty Diesel Car Applications

Modelling Inhibition Effects of Short-Chain Hydrocarbons on a Small-Pore Cu-Zeolite NH$_{3}$-SCR Catalyst

Basic investigation of the chemical deactivation of V$_{2}$O$_{5}$/WO$_{3}$-TiO$_{2}$ SCR catalysts by potassium, calcium, and phosphate

Infrared Spectroscopic Study of the NH$_{3}$-SCR on Fe-Zeolites under Transient Conditions

Physical and chemical characterisation of potassium deactivation of a SCR catalyst for biomass combustion

Fe-ZSM-5 Catalyst Prepared by Ion Exchange from Fe(acac)$_{3}$: Application into NH$_{3}$-SCR of NO

A System Simulation Study of the Enhanced-SCR Reaction

NH$_{3}$-SCR Activity of H-BEA and Fe-BEA After Potassium Exposure

Similar Documents

Influence of Hydrothermal Ageing on NH$_{3}$-SCR Over Fe-BEA—Inhibition of NH$_{3}$-SCR by Ammonia

Alkali Resistant Fe-Zeolite Catalysts for SCR of NO with NH$_{3}$ in Flue Gases

Combination of Ag/Al$_{2}$O$_{3}$ and Fe-BEA for High-Activity Catalyst System for H$_{2}$-Assisted NH$_{3}$-SCR of NO$_{ x }$ for Light-Duty Diesel Car Applications

Modelling Inhibition Effects of Short-Chain Hydrocarbons on a Small-Pore Cu-Zeolite NH$_{3}$-SCR Catalyst

Basic investigation of the chemical deactivation of V$_{2}$O$_{5}$/WO$_{3}$-TiO$_{2}$ SCR catalysts by potassium, calcium, and phosphate

Infrared Spectroscopic Study of the NH$_{3}$-SCR on Fe-Zeolites under Transient Conditions

Physical and chemical characterisation of potassium deactivation of a SCR catalyst for biomass combustion

Fe-ZSM-5 Catalyst Prepared by Ion Exchange from Fe(acac)$_{3}$: Application into NH$_{3}$-SCR of NO

A System Simulation Study of the Enhanced-SCR Reaction

NH$_{3}$-SCR Activity of H-BEA and Fe-BEA After Potassium Exposure