Durability of Cu/SAPO-34 catalyst for NOx reduction by ammonia: Potassium and sulfur poisoning

被引：33
|
作者：
Liu, Xuesong [1 ,2 ]
Wu, Xiaodong [1 ,2 ]
Weng, Duan [1 ,2 ]
Si, Zhichun [2 ]
机构：
[1] Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat, Minist Educ, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Grad Sch Shenzhen, Adv Mat Inst, Shenzhen 518055, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2015年 / 59卷
关键词：
Cu/SAPO-34; NH3-SCR; Potassium; Sulfur dioxide; Active sites; Acid sites; NITRIC-OXIDE; SCR; COPPER; RESISTANCE; DENO(X); REGENERATION; STABILITY; LOCATION; SITES; SO2;
D O I：
10.1016/j.catcom.2014.09.033
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：
Cu/SAPO-34 catalyst prepared by a wetness impregnation method shows better low-temperature NH3-SCR performance and higher alkali poisoning resistance than V2O5/WO3-TiO2 catalyst, but it exhibits a weaker resistance to sulfur dioxide. Both the poisoning treatments improve the high-temperature NOx conversion but decrease the low-temperature performance of Cu/SAPO-34. The textural properties and surface acidity are affected by the poisoning treatments to some extent Nevertheless, the reducibility of copper species is suggested to be a more important factor to determine the deNO(x) performance of the catalysts. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：35 / 39
页数：5
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