Zeolite ZSM-5 Supported Bimetallic Fe-Based Catalysts for Selective Catalytic Reduction of NO: Effects of Acidity and Metal Loading

被引：6

作者：

Hung, Chin-Te ^{[1
]}

Lin, Kai-Chen ^{[1
,2
]}

Wang, Chen-Bin ^{[3
]}

Begum, Sayeda Halima ^{[1
,4
,6
]}

Han, Xiaoxiang ^{[5
]}

Liu, Shang-Bin ^{[1
,2
]}

机构：

[1] Acad Sinica, Inst Atom & Mol Sci, Taipei 10617, Taiwan

[2] Natl Taiwan Normal Univ, Dept Chem, Taipei 11677, Taiwan

[3] Natl Def Univ, Dept Chem & Mat Engn, Chung Cheng Inst Technol, Taoyuan 33449, Taiwan

[4] Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan

[5] Zhejiang Gongshang Univ, Dept Appl Chem, Hangzhou 310035, Zhejiang, Peoples R China

[6] Univ Chittagong, Dept Chem, Chittagong 4331, Bangladesh

来源：

ADVANCED POROUS MATERIALS | 2016年 / 4卷 / 03期

关键词：

Environmental Catalysis; NOx Reduction; NH3-SCR; Bimetallic Fe-Based Zeolite; Acidity; Solid-State P-31 MAS NMR;

D O I：

10.1166/apm.2016.1117

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A comprehensive study on effects of acidity and metal loading on catalytic activity during selective catalytic reduction (SCR) of NO by NH3 over a series of bimetallic Fe-based H-ZSM-5 catalysts (MFe-Z; Z = ZSM-5 zeolite; Si/Al= 25; M = Cr, Co, Cu, Ce, Pr) has been made. The acidic properties, viz. type, concentration, distribution, and strength of acid sites, of various catalysts were monitored by solid-state P-31 MAS NMR of adsorbed phosphorous base probe molecule. Accordingly, the correlations between acid features and SCR activity of various catalysts were investigated. It was found that in the presence of the primary metal (Fe), further incorporation of a secondary metal (M) provokes formation of ultra-strong Lewis acid sites, which are favorable for the Bronsted-Lewis acid synergy during the NH3-SCR. The bimetallic Fe-based MFe-Z catalysts exhibited superior NH3-SCR performance over a temperature range of 200-450 degrees C and a desirable NO conversion of 80%, rendering perspective and practical industrial applications for DeNO(x).

引用

页码：189 / 199

页数：11

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