Naphthalene hydrogenation over Pt/MCM-41 catalyst

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题名:	Naphthalene hydrogenation over Pt/MCM-41 catalyst
作者:	Chen,YW;Li,CP
贡献者:	化學工程與材料工程學系
关键词:	SUPPORTED PLATINUM CATALYSTS;ALUMINA ALUMINUM PHOSPHATE;LIQUID-PHASE HYDROGENATION;TRICKLE-BED REACTOR;HEAVY RESIDUE OILS;AROMATICS REDUCTION;BORATE CATALYSTS;HYDRODESULFURIZATION REACTIONS;HYDROTREATING REACTIONS;RESTRICTIVE DIFFUSION
日期:	1997
上传时间:	2010-06-29 17:31:10 (UTC+8)
出版者:	中央大學
摘要:	Pt/MCM-41 and Pt/Al2O3 catalysts were prepared by incipient-wetness impregnation method. These catalysts were characterized by X-ray diffraction, nitrogen sorption, CO chemisorption, and temperature-programmed desorption of ammonia. Naphthalene dissolved in n-hexadecane was used as a model compound to simulate the aromatics in diesel fuels for the hydrogenation activity test. The reaction was carried out in a cocurrent down-flow trickle bed reactor at 4.2 MPa, 453 K, an LHSV of 2.8 h(-1), and H-2/liquid feed of 800 mL/mL (in excess). MCM-41 has a medium-strength acidity and large surface area compared to alumina. The metal dispersion on MCM-41 is higher than that on Al2O3. Pt/MCM-41 demonstrating a higher activity than Pt/Al2O3. This is essentially due to its higher acidity of the support and the higher metal dispersion. Both are beneficial to the overall hydrogenation activity. The high acidity can enhance the spillover of aromatics from metal surface to the metal-support interfacial region. Consequently, more acid supports will give an additional contribution to the overall activity. The cis-decalin selectivity of Pt/MCM-41 is lower than that of Pt/Al2O3, owing to the higher acidity of MCM-41 than Al2O3.
關聯:	JOURNAL OF THE CHINESE INSTITUTE OF CHEMICAL ENGINEERS
显示于类别:	[化學工程與材料工程研究所] 期刊論文

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