Pt-Sn/Al2O3蜂窝催化剂催化氧化C6烃

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Abstract

The Pt-Sn/Al₂O₃ honeycomb catalysts were prepared by incipient wetness sequence impregnation procedure (the content of Pt is only 0.06wt%), which were characterized by XRD, TEM and so on. The performances of catalysts were evaluated by selecting four representative C₆ hydrocarbons (benzene, cyclohexanone, cyclohexane and n-hexane). The optimal Pt/Sn ratio was 3/1 (w/w) in evaluating the catalytic activities, where the T₉₀ of four C₆ hydrocarbons decreased by about 20℃ compared with the Pt catalyst. Sn improved dispersion of Pt by dividing Pt into smaller clusters. The conversion of cyclohexane over Pt/Sn=3/1catalyst displayed no significant change after 720h of continuous run, in that Sn inhibited size growth effectively and Pt₃Sn alloy structure weakened the adsorption of C₆ hydrocarbons to reduce surface coke deposition.

Key words： Pt C₆ hydrocarbons VOCs density functional theory Pt₃Sn alloy

Received: 29 August 2019

PACS:

X511

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	Articles by authors
	LIU Yi-Fan
	LONG Gao-Yuan
	HAN Gao-Rui
	SHEN Yi-xin
	ZHAO Wei-Rong

Cite this article:

LIU Yi-Fan,LONG Gao-Yuan,HAN Gao-Rui等. Catalytic oxidation of C₆ hydrocarbons on Pt-Sn/Al₂O₃ honeycomb catalysts[J]. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(4): 1437-1443.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2020/V40/I4/1437

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