Pore Size Expansion Accelerates Ammonium Bisulfate Decomposition for Improved Sulfur Resistance in Low-Temperature NH3‑SCR

• Published in: ACS applied materials & interfaces Vol. 11; no. 5; pp. 4900 - 4907
• Main Authors: Guo, Kai, Fan, Gaofeng, Gu, Di, Yu, Shuohan, Ma, Kaili, Liu, Annai, Tan, Wei, Wang, Jiaming, Du, Xiangze, Zou, Weixin, Tang, Changjin, Dong, Lin
• Format: Journal Article
• Language: English
• Published: American Chemical Society 06.02.2019
• Subjects: active sites; ammonium bisulfate; catalysts; chromatography; engineering; Fourier transform infrared spectroscopy; poisoning; porosity; porous media; quantitative analysis; silica; sulfates; sulfur; temperature; NH3-SCR; pore size effect; sulfur poisoning; ammonium bisulfate decomposition; low temperature

Sulfur poisoning has long been recognized as a bottleneck for the development of long-lived NH3-selective catalytic reduction (SCR) catalysts. Ammonium bisulfate (ABS) deposition on active sites is the major cause of sulfur poisoning at low temperatures, and activating ABS decomposition is regarded...