Hits:

Indexed by:期刊论文

Date of Publication:2008-09-01

Journal:CATALYSIS LETTERS

Included Journals:EI、SCIE、Scopus

Volume:125

Issue:1-2

Page Number:123-129

ISSN No.:1011-372X

Key Words:sodium; FER; nitrosonium ions; nitrate; acetylene; selective catalytic NO reduction

Abstract:Influence of sodium in ferrierite (HFER) zeolite on selective catalytic reduction of NO by acetylene (C(2)H(2)-SCR) was investigated. NO(x) -TPD and FT-IR indicated that small amount of sodium exchanged into the proton-form zeolite with an exchange level of about 11.8% is beneficial for the title reaction by accelerating active nitrate species formation on catalyst surface from NO(2) and by suppressing the reductant combustion. Nevertheless, no further improved catalytic performance in C(2)H(2)-SCR could be observed by a larger amount of sodium exchanged into HFER due to some inactive nitrate species formed on the zeolite. Instead, activity of the zeolite for C(2)H(2)-SCR was drastically reduced, since the capacity of the zeolite for catalyzing NO oxidation and accelerating active NO(+) species formation was remarkably depressed.