丙烷催化还原脱硝中硫中毒Cu-Ir/H-ZSM-5催化剂的再生

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Abstract

Effect of regeneration parameters of H₂ reduction on sulfur poisoning Cu-Ir/H-ZSM-5catalyst for catalytic reduction of NO_x with propane (C₃H₈-SCR) was investigated. The regeneration behavior was carried out by N₂ adsorption, X-ray diffraction (XRD), X-ray photoelectron spectrometer (XPS) and hydrogen temperature-programmed reduction (H₂-TPR). Deactivation of Cu-Ir/H-ZSM-5was caused by the formation of CuSO₄, resulting in the loss of the active sites, decrease of the surface area, microspore area and pore volume of catalyst. The temperature of 500℃ and regeneration gas consumption of 42.8L/g_catalyst were the best regeneration condition for H₂ reduction, because of the lowest content (0.4%) of CuSO₄ on Cu-Ir/H-ZSM-5catalyst. The activity of Cu-Ir/H-ZSM-5catalyst regenerated could be returned to 95% of the fresh catalyst. The increase of the surface area, microspore area, and pore volume of catalyst was obtained by H₂ reduction.

Key words： Cu-Ir/H-ZSM-5catalyst H₂ reduction regeneration sulfur poisoning catalytic reduction by C₃H₈

Received: 06 November 2015

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X511

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	PAN Hua
	JIAN Yan-fei
	GUO Yu-hui
	CHEN Ning-na
	HE Chi

Cite this article:

PAN Hua,JIAN Yan-fei,GUO Yu-hui等. Regeneration of sulfur poisoning Cu-Ir/H-ZSM-5catalyst in catalytic reduction of NO_x with propane by H₂ reduction[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(5): 1360-1365.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I5/1360

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