An investigation of the selective oxidation of NH3 to N2 in gasified biomass in the presence of excess CO and H2 using zeolite catalysts

被引：19

作者：

Amblard, M ^{[1
]}

Burch, R ^{[1
]}

Southward, BWL ^{[1
]}

机构：

[1] Queens Univ Belfast, Sch Chem, Belfast BT9 5AG, Antrim, North Ireland

来源：

CATALYSIS LETTERS | 2000年 / 68卷 / 1-2期

关键词：

biomass; heterogeneous catalyst; selective NH3 oxidation; zeolite;

D O I：

10.1023/A:1019054613815

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The selective oxidation of NH3 to N-2 in simulated biogas containing a large excess of CO and H-2 has been examined using zeolite catalysts. Of the materials examined zeolite Beta gave the highest N-2 yield (85% at 475-575 degrees C), while ZSM5 produced 75% at 575 degrees C, but HY was both less active and selective. In all cases N-2 is formed via an internal selective catalytic reduction between NOx (derived from the oxidation of NH3) and NH3 adsorbed on Bronsted sites of the zeolite.

引用

页码：105 / 108

页数：4

共 14 条

[1]

Amblard M, 1999, APPL CATAL B-ENVIRON, V22, pL159

[2]

AMBLARD M, IN PRESS CATAL TODAY

[3] A characterization study of the surface acidity of solid catalysts by temperature programmed methods [J].

Arena, F ;

Dario, R ;

Parmaliana, A .

APPLIED CATALYSIS A-GENERAL, 1998, 170 (01) :127-137

[4] Highly selective catalysts for conversion of ammonia to nitrogen in gasified biomass [J].

Burch, R ;

Southward, BWL .

CHEMICAL COMMUNICATIONS, 1999, (16) :1475-1476

[5] Chemical and mechanistic aspects of the selective catalytic reduction of NOx by ammonia over oxide catalysts:: A review [J].

Busca, G ;

Lietti, L ;

Ramis, G ;

Berti, F .

APPLIED CATALYSIS B-ENVIRONMENTAL, 1998, 18 (1-2) :1-36

[6]

*DTI ETSU CLEAN CO, 1996, DEV IMPR STABL CAT T

[7]

Dyer A., 1988, INTRO ZEOLITE MOL SI

[8]

Johansson EM, 1999, CATAL TODAY, V47, P359

[9]

Le Van Mao R, 1999, APPL CATAL A-GEN, V185, P41

[10] NH3 oxidation during the catalytic combustion of biomasses-related fuels over Mn-substituted hexaaluminates [J].

Lietti, L ;

Groppi, G ;

Ramella, C .

CATALYSIS LETTERS, 1998, 53 (1-2) :91-95

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