Selective catalytic reduction of nitric oxide by hydrogen over Zn-ZSM-5 and Pd and Pd/Ru based catalysts

Lifeng Wang; Hao Chen; Min Hao Yuan; Sandrine Rivillon; Eric H. Klingenberg; Jimmy Xianming Li; Ralph T. Yang

doi:10.1016/j.apcatb.2014.01.036

Selective catalytic reduction of nitric oxide by hydrogen over Zn-ZSM-5 and Pd and Pd/Ru based catalysts

Lifeng Wang
, Hao Chen
, Min Hao Yuan
, Sandrine Rivillon
, Eric H. Klingenberg
, Jimmy Xianming Li
, Ralph T. Yang

Department of Chemical and Biological Engineering

University of Michigan, Ann Arbor
Air Products and Chemicals, Inc.

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

The catalytic reduction of NO_x with hydrogen (H₂-SCR) in excess oxygen over a non-noble metal catalyst, Zn-ZSM-5, was studied for the first time. The results showed that Zn-ZSM-5 had considerable activity for H₂-SCR, with a single NO_x conversion peak at 250°C, and high N₂ product selectivity. Two noble metal based catalysts, Pd/Zn-ZSM-5 and Pd/Ru/W/(ZrO₂-SiO₂)SO₄, were also synthesized and their H₂-SCR activities were evaluated and compared with Zn-ZSM-5 under identical laboratory experimental conditions. The effects of CO concentration, water vapor and SO₂ added to the feed gas (NO, H₂, balance He) on H₂-SCR over these three catalysts were also studied and compared. hydrogen temperature programmed desorption (H₂-TPD) experiments were performed on Zn-ZSM-5: the results showed strong chemisorption of hydrogen, while both the amount and the binding strength of the chemisorbed hydrogen increased with the hydrogen dosing temperature. The role of Zn cations in the chemisorption is also discussed.

Original language	English
Pages (from-to)	162-171
Number of pages	10
Journal	Applied Catalysis B: Environmental
Volume	152-153
Issue number	1
DOIs	https://doi.org/10.1016/j.apcatb.2014.01.036
State	Published - Jun 25 2014

Keywords

H-SCR
NO reduction
Noble metal based catalyst
TPD
Zn-ZSM-5

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10.1016/j.apcatb.2014.01.036

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title = "Selective catalytic reduction of nitric oxide by hydrogen over Zn-ZSM-5 and Pd and Pd/Ru based catalysts",

abstract = "The catalytic reduction of NOx with hydrogen (H2-SCR) in excess oxygen over a non-noble metal catalyst, Zn-ZSM-5, was studied for the first time. The results showed that Zn-ZSM-5 had considerable activity for H2-SCR, with a single NOx conversion peak at 250°C, and high N2 product selectivity. Two noble metal based catalysts, Pd/Zn-ZSM-5 and Pd/Ru/W/(ZrO2-SiO2)SO4, were also synthesized and their H2-SCR activities were evaluated and compared with Zn-ZSM-5 under identical laboratory experimental conditions. The effects of CO concentration, water vapor and SO2 added to the feed gas (NO, H2, balance He) on H2-SCR over these three catalysts were also studied and compared. hydrogen temperature programmed desorption (H2-TPD) experiments were performed on Zn-ZSM-5: the results showed strong chemisorption of hydrogen, while both the amount and the binding strength of the chemisorbed hydrogen increased with the hydrogen dosing temperature. The role of Zn cations in the chemisorption is also discussed.",

keywords = "H-SCR, NO reduction, Noble metal based catalyst, TPD, Zn-ZSM-5",

author = "Lifeng Wang and Hao Chen and Yuan, \{Min Hao\} and Sandrine Rivillon and Klingenberg, \{Eric H.\} and Li, \{Jimmy Xianming\} and Yang, \{Ralph T.\}",

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doi = "10.1016/j.apcatb.2014.01.036",

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AU - Wang, Lifeng

AU - Chen, Hao

AU - Yuan, Min Hao

AU - Rivillon, Sandrine

AU - Klingenberg, Eric H.

AU - Li, Jimmy Xianming

AU - Yang, Ralph T.

PY - 2014/6/25

Y1 - 2014/6/25

N2 - The catalytic reduction of NOx with hydrogen (H2-SCR) in excess oxygen over a non-noble metal catalyst, Zn-ZSM-5, was studied for the first time. The results showed that Zn-ZSM-5 had considerable activity for H2-SCR, with a single NOx conversion peak at 250°C, and high N2 product selectivity. Two noble metal based catalysts, Pd/Zn-ZSM-5 and Pd/Ru/W/(ZrO2-SiO2)SO4, were also synthesized and their H2-SCR activities were evaluated and compared with Zn-ZSM-5 under identical laboratory experimental conditions. The effects of CO concentration, water vapor and SO2 added to the feed gas (NO, H2, balance He) on H2-SCR over these three catalysts were also studied and compared. hydrogen temperature programmed desorption (H2-TPD) experiments were performed on Zn-ZSM-5: the results showed strong chemisorption of hydrogen, while both the amount and the binding strength of the chemisorbed hydrogen increased with the hydrogen dosing temperature. The role of Zn cations in the chemisorption is also discussed.

AB - The catalytic reduction of NOx with hydrogen (H2-SCR) in excess oxygen over a non-noble metal catalyst, Zn-ZSM-5, was studied for the first time. The results showed that Zn-ZSM-5 had considerable activity for H2-SCR, with a single NOx conversion peak at 250°C, and high N2 product selectivity. Two noble metal based catalysts, Pd/Zn-ZSM-5 and Pd/Ru/W/(ZrO2-SiO2)SO4, were also synthesized and their H2-SCR activities were evaluated and compared with Zn-ZSM-5 under identical laboratory experimental conditions. The effects of CO concentration, water vapor and SO2 added to the feed gas (NO, H2, balance He) on H2-SCR over these three catalysts were also studied and compared. hydrogen temperature programmed desorption (H2-TPD) experiments were performed on Zn-ZSM-5: the results showed strong chemisorption of hydrogen, while both the amount and the binding strength of the chemisorbed hydrogen increased with the hydrogen dosing temperature. The role of Zn cations in the chemisorption is also discussed.

KW - H-SCR

KW - NO reduction

KW - Noble metal based catalyst

KW - TPD

KW - Zn-ZSM-5

UR - https://www.scopus.com/pages/publications/84894079831

U2 - 10.1016/j.apcatb.2014.01.036

DO - 10.1016/j.apcatb.2014.01.036

M3 - Article

AN - SCOPUS:84894079831

SN - 0926-3373

VL - 152-153

SP - 162

EP - 171

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

IS - 1

ER -

Selective catalytic reduction of nitric oxide by hydrogen over Zn-ZSM-5 and Pd and Pd/Ru based catalysts

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Keywords

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