Knowledge and know-how in improving the sulfur tolerance of deNOx catalysts
Knowledge and know-how in improving the sulfur tolerance of deNOx catalysts
复制标题
提高脱硝催化剂耐硫性的知识和技巧
DOI：
10.1016/j.cattod.2010.01.061
复制
发表时间：
2010-08-01
期刊：
影响因子：
5.3
通讯作者：
Junaid, Abu S. M.
中科院分区：
文献类型：
--
作者：
Liu, Zhiming;Li, Junhua;Junaid, Abu S. M.
利用不同还原剂对NOx进行选择性催化还原（SCR）和NOx存储还原（NSR）被认为是两种最有前途的NOx去除技术，尽管针对这些工艺已经开发了多种催化系统，但由于废气中SO2引起催化剂失活，它们的实际应用仍然困难。提高催化剂对SO2的耐受性是deNO(x)催化剂发展的重要目标之一。本文综述了近年来国内外在提高deNO(x)催化剂耐硫性能方面所取得的进展，并对Ag/Al2O3作为HC-SCR催化剂中最有前途的催化剂进行了NOx负载改性、H-2共进料以及提高Ag/Al2O3耐硫性能的一些策略进行了讨论。对NH3-SCR、H-2-SCR和NSR的高耐硫新型催化剂体系分别进行了研究，对于NSR催化剂，开发新型耐硫NOx存储系统和有效的脱硫工艺似乎是提高其耐硫性的两种途径(C) 2010 Elsevier B V. All rights reserved。
Catalytic removal of NOx under lean-burn conditions is challenging to attain the future stringent NOx emission standards Selective catalytic reduction (SCR) of NOx with different reducing agents and NOx storage-reduction (NSR) are viewed as the two most promising technologies for NOx removal Although a variety of catalytic systems have been developed for these processes, their practical applications remain difficult due to catalyst deactivation caused by SO2 in the exhaust gases Therefore, improving catalyst tolerance against SO2 is one of the most important targets in the deNO(x), catalyst development. This review focuses on the knowledge and know-how that have been developed in improving the sulfur tolerance of deNO(x) catalysts Ag/Al2O3 is the most promising catalyst for the HC-SCR of NOx Support modification, H-2 co-feeding and some other strategies to improve the sulfur tolerance of Ag/Al2O3 are discussed. Some novel catalyst systems with high sulfur tolerance for NH3-SCR, H-2-SCR and NSR are addressed, respectively For NSR catalysts, developing novel sulfur resistant NOx storage systems and effective desulfation processes seem to be two avenues to improve their sulfur resistance (C) 2010 Elsevier B V. All rights reserved.