The effective promotion of trace amount of Cu on Ce/WO3-ZrO2-TiO2 monolithic catalyst for the low-temperature NH3-SCR of NOx

被引：10

作者：

Li, Yuanshan ^{[1
]}

Xu, Haidi ^{[2
]}

Feng, Xi ^{[1
]}

Liu, Shuang ^{[3
]}

Chen, Yaoqiang ^{[2
,4
]}

机构：

[1] Sichuan Univ, Sch Chem Engn, Chengdu 610064, Sichuan, Peoples R China

[2] Sichuan Univ, Inst New Energy & Low Carbon Technol, Chengdu 610064, Sichuan, Peoples R China

[3] Sichuan Univ, Coll Chem, Chengdu 610064, Sichuan, Peoples R China

[4] Sichuan Univ, Key Lab Green Chem & Technol, Minist Educ Chem, Chengdu 610064, Sichuan, Peoples R China

来源：

CANADIAN JOURNAL OF CHEMICAL ENGINEERING | 2018年 / 96卷 / 05期

关键词：

NH3-SCR; nitrogen oxides; low temperature activity; trace amounts copper; monolithic catalyst; MIXED-OXIDE CATALYST; SUPERIOR CATALYST; REDOX PROPERTIES; SCR CATALYST; RARE-EARTH; REDUCTION; NH3; CE; AMMONIA; MECHANISM;

D O I：

10.1002/cjce.23045

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The selective catalytic reduction of NOx with NH3 (NH3-SCR) activity of 0.10g/g CeO2/WO3-ZrO2-TiO2 (Ce/WZT) in low temperature range was greatly enhanced by the addition of 0.00010g/g Cu (Cu/Ce mass ratio=1:1000). The temperature of complete NOx conversion (T-90) decreased as much as 36 degrees C (from 263 degrees C to 227 degrees C) under a gas hourly space velocity (GHSV) of 30000h(-1). XPS, NH3/O-2-TPD, H-2-TPR, XRD, and FTIR characterizations revealed that the interaction between Cu and Ce, more active oxygen species, stronger NH3 and NO oxidation ability, better redox ability, together with the abundant BrOnsted acid sites contributed to better catalytic activity of 0.00010g/g Cu-0.10g/g Ce/WO3-ZrO2-TiO2 (CC/WZT) catalyst at low temperatures.

引用

页码：1168 / 1175

页数：8

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