Hydrothermal aging alleviates the inhibition effects of NO2 on Cu-SSZ-13 for NH3-SCR

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气污染控制中心

	Hydrothermal aging alleviates the inhibition effects of NO2 on Cu-SSZ-13 for NH3-SCR
	Shan, Yulong; Sun, Yu; Du, Jinpeng; Zhang, Yan; Shi, Xiaoyan; Yu, Yunbo; Shan, Wenpo; He, Hong
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2020-10-15
卷号	275 页码:1-11
关键词	Hydrothermal aging Fast SCR Inhibition effects Cu-SSZ-13 Bronsted acid sites
ISSN号	0926-3373
英文摘要	Fresh and hydrothermally aged Cu-SSZ-13 catalysts were tested for the standard and fast selective catalytic reduction of NOx with NH3 (NH3-SCR). Interestingly, NO2 exhibited distinctly different effects on these two catalysts. NOx conversion over fresh Cu-SSZ-13 was clearly inhibited by NO2, while hydrothermal aging could reverse this inhibition effect. It was found that the NOx conversion decreased with progressive hydrothermal aging under standard SCR (SSCR) conditions but increased under fast SCR (FSCR) conditions. The N-2 adsorption/desorption isotherms indicated the formation of mesopores induced by hydrothermal aging, which is favorable for gas diffusion. Temperature programmed desorption (TPD) and in situ DRIFTS, combined with other auxiliary measurements, demonstrated that L-NH3 (NH3 adsorbed onto Lewis acid sites) is more active toward both NO+O-2 and NO2 for the formation of N-2, while B-NH3 (NH3 adsorbed onto Bronsted acid sites) is mainly responsible for the formation of NH4NO3. The amount and stability of NH4NO3 formed under FSCR conditions decreased with progressive hydrothermal aging due to the loss of Bronsted acid sites.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/45079]
专题	生态环境研究中心_大气污染控制中心
推荐引用方式 GB/T 7714	Shan, Yulong,Sun, Yu,Du, Jinpeng,et al. Hydrothermal aging alleviates the inhibition effects of NO2 on Cu-SSZ-13 for NH3-SCR[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2020,275:1-11.
APA	Shan, Yulong.,Sun, Yu.,Du, Jinpeng.,Zhang, Yan.,Shi, Xiaoyan.,...&He, Hong.(2020).Hydrothermal aging alleviates the inhibition effects of NO2 on Cu-SSZ-13 for NH3-SCR.APPLIED CATALYSIS B-ENVIRONMENTAL,275,1-11.
MLA	Shan, Yulong,et al."Hydrothermal aging alleviates the inhibition effects of NO2 on Cu-SSZ-13 for NH3-SCR".APPLIED CATALYSIS B-ENVIRONMENTAL 275(2020):1-11.