纳米孔Pt-(Re,Sn)/HZSM5-HMS催化剂上正庚烷异构化反应的实验和动力学研究

doi:10.1016/S1872-2067(15)61114-7

催化学报 ›› 2016, Vol. 37 ›› Issue (9): 1477-1486.DOI: 10.1016/S1872-2067(15)61114-7

纳米孔Pt-(Re,Sn)/HZSM5-HMS催化剂上正庚烷异构化反应的实验和动力学研究

N. Parsafard^a, M. H. Peyrovi^a, M. Rashidzadeh^b

a. Shahid Beheshti大学化学学院物理化学系, 德黑兰 1983963113, 伊朗;
b. 石油工业研究所, 德黑兰 1485733111, 伊朗

收稿日期:2016-03-11 修回日期:2016-04-18 出版日期:2016-09-21 发布日期:2016-09-21
通讯作者: N. Parsafard

Experimental and kinetic study of n-heptane isomerization on nanoporous Pt-(Re,Sn)/HZSM5-HMS catalysts

N. Parsafard^a, M. H. Peyrovi^a, M. Rashidzadeh^b

a. Faculty of Chemistry, Department of Physical Chemistry, University of Shahid Beheshti, Tehran, 1983963113, Iran;
b. Research Institute of Petroleum Industry(RIPI), Tehran, 1485733111, Iran

Received:2016-03-11 Revised:2016-04-18 Online:2016-09-21 Published:2016-09-21
Contact: N. Parsafard

摘要/Abstract

摘要：

在200-350℃考察了Pt-（Sn，Re）/HZSM5-HMS催化剂上正庚烷异构化反应.采用X射线衍射、X射线荧光光谱、傅里叶变换红外光谱、紫外-可见光谱、H₂程序升温还原、NH₃程序升温脱附、吸附吡啶红外光谱、H₂化学吸附、N₂吸附-脱附、扫描电镜和热重等技术对催化剂进行了表征.在不同的H₂和正庚烷分压条件下考察了正庚烷异构化反应动力学，研究了反应条件对催化性能的影响.结果表明，双金属催化剂和三金属催化剂表现出比单金属催化剂更高的催化性能.200℃时Pt-Sn/HZSM5-HMS催化剂表现出最高的异庚烷选择性（>74%）和多支链异构体选择性（40%）.

关键词: 双金属催化剂, 三金属催化剂, 正庚烷异构化, 选择性, 多支链异构体

Abstract:

Pt-(Sn,Re)/HZSM5-HMS catalysts were evaluated for n-heptane isomerization at 200-350℃. To characterize the catalyst, X-ray diffraction, X-ray fluorescene, Fourier transform infrared spectroscopy, ultraviolet-visible diffuse reflectance spectroscopy, temperature-programmed reduction of H₂, temperature-programmed desorption of NH₃, infrared spectroscopy of adsorbed pyridine, H₂ chemisorption, nitrogen adsorption-desorption, scanning electron microscopy and thermogravimetric analysis were performed. Kinetics of n-C₇ isomerization were investigated under various hydrogen and n-C₇ pressures, and the effects of reaction conditions on catalytic performance were studied. The results showed that biand trimetallic catalysts exhibit better performance than monometallic catalysts for this reaction. For example, a maximum i-C₇ selectivity(> 74%) and multibranched isomer selectivity(40%) were observed for Pt-Sn/HZSM5-HMS at 200℃.

Key words: Bimetallic catalyst, Trimetallic catalyst, n-Heptane isomerization, Selectivity, Multibranched isomer

N. Parsafard, M. H. Peyrovi, M. Rashidzadeh. 纳米孔Pt-(Re,Sn)/HZSM5-HMS催化剂上正庚烷异构化反应的实验和动力学研究[J]. 催化学报, 2016, 37(9): 1477-1486.

N. Parsafard, M. H. Peyrovi, M. Rashidzadeh. Experimental and kinetic study of n-heptane isomerization on nanoporous Pt-(Re,Sn)/HZSM5-HMS catalysts[J]. Chinese Journal of Catalysis, 2016, 37(9): 1477-1486.

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纳米孔Pt-(Re,Sn)/HZSM5-HMS催化剂上正庚烷异构化反应的实验和动力学研究

Experimental and kinetic study of n-heptane isomerization on nanoporous Pt-(Re,Sn)/HZSM5-HMS catalysts

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