Effect of Pt particle size on methylcyclohexane dehydrogenation over Pt/ Al2O3 catalysts

被引：19

作者：

Chen, Chen-Xu ^{[1
]}

Cao, Jing-Pei ^{[1
]}

Jiang, Wei ^{[1
]}

Tang, Wen ^{[1
]}

Zhang, Chuang ^{[1
]}

Yao, Nai-Yu ^{[1
]}

Wang, Hong-Yan ^{[1
]}

Zhao, Xiao-Yan ^{[1
]}

机构：

[1] China Univ Min & Technol, Jiangsu Prov Engn Res Ctr Fine Utilizat Carbon Res, Xuzhou 221116, Jiangsu, Peoples R China

来源：

FUEL | 2024年 / 360卷

基金：

中国国家自然科学基金;

关键词：

Methylcyclohexane dehydrogenation; Pt size effect; Pt/Al2O3; catalysts; Dehydrogenation regeneration cycles; SN CLUSTERS; HYDROGEN; PLATINUM; STORAGE; NANOPARTICLES; CHALLENGES; MORPHOLOGY; OXIDATION; PT/AL2O3; SYSTEM;

D O I：

10.1016/j.fuel.2023.130607

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

A rational design of highly active and durable Pt catalysts for methylcyclohexane (MCH) dehydrogenation is essential for the utilization of liquid organic hydrogen carriers. Herein, a series of Pt/Al2O3 catalysts supported with a particle size of Pt ranging from 0.78 to 2.02 nm were synthesized and the effect of the particle size of Pt on the activity and stability of the catalyst for the MCH dehydrogenation were studied. The Pt loaded on Al2O3 with an actual average particle size of about 1.57 nm (Pt/Al2O3-1.57) has the highest activity and stability when compared to other Pt/Al2O3 catalysts. The hydrogen evolution rate of Pt/Al2O3-1.57 reaches about 656.12 mmol center dot gPt(-1)center dot min(-1) while its apparent activation energy (38.05 KJ center dot mol(-1)) and deactivation rate (0.11 %/min) are the lowest. Both the poisoning experiment and the catalyst characterization demonstrate that the competition between the number of active sites and the strength of toluene adsorption explain why the particle size of Pt affects the MCH dehydrogenation. Additionally, the Pt/Al2O3-1.57 catalyst also maintains an excellent performance after three cycles of regeneration.

引用

页数：9

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