载体改性提高船舶尾气锰铬催化剂的脱硝性能

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Abstract The manganese-chromium denitration catalysts with different supports of ZrO₂, Al₂O₃, CeO₂, CeO₂-ZrO₂ and CeO₂-Al₂O₃ were prepared by the co-precipitation method. The microstructure characterizations of the as-synthesized catalysts were measured by BET, XRD, SEM, H₂-TPR, NH₃-TPD andXPS analyses, and the SCR denitrification performances of the catalysts for ship exhaust gas at low-temperature were investigated. The results show that the supports dramatically improve the specific surface area of the manganese-chromium catalyst, increase the number and strength of the acidic sites on catalysts, and improve the denitrification performance at low-temperature. Except for ZrO₂ support, the NO conversions of all catalysts exceed 90% under a simulative exhaust gas treatment condition with a temperature of 175—275 ℃ and a space velocity of 100 000 h^-1. In addition, the NO conversion rates of CeO₂ and CeO₂-Al₂O₃ support catalysts were more than 80% at 225 ℃ accompanied by SO₂ at 150×10^-6, preserving excellent denitration performance at low-temperature. High-valencce metal elements can promote the SCR reaction and improve the low-temperature activity and sulfur resistance.

Key words： ship exhaust gas low-temperature denitration metal oxide selective catalytic reduction

Published: 05 June 2022 Online: 2022-06-08

CLC number:

X511

Fund:National Natural Science Foundation of China(21776266).

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	Articles by authors
	ZHAO Yingping
	TAO Ping
	LI Wenhua
	MIN Xiubo
	YU Yixuan
	SUN Tianjun

Cite this article:

ZHAO Yingping,TAO Ping,LI Wenhua, et al. Support Modification Improves the Denitrification Performance of Ship Exhaust Manganese-Chromium Catalyst[J]. Materials Reports, 2022, 36(Z1): 21080248-6.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2022/V36/IZ1/21080248

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