Synthesis of the PtxZn/MSN catalysts and the study of their propane dehydrogenation properties

doi:10.7503/cjcu20250011

Chem. J. Chinese Universities

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Synthesis of the PtxZn/MSN catalysts and the study of their propane dehydrogenation properties

WANG Wenxin¹, SHAN Yiou¹, SONG Jiaxin¹, FAN Xiaoqiang¹, YU Xuehua¹, KONG Lian¹, XIAO Xia¹, XIE Zean¹, ZHAO Zhen^1,2

1. Shenyang Normal University 2. China University of Petroleum

Received:2025-01-10 Revised:2025-02-22 Online First:2025-03-05 Published:2025-03-05
Contact: Zhaozhen E-mail:zhenzhao@cup.edu.cn
Supported by:
Supported by National Natural Science Foundation of China (No.22172101); Liaoning Province Applied Basic Research Program (No.2023JH2/101600059); Liaoning Xingliao Talented Youth Top Talent Program (No.XLYC2203138); The Fundamental Research Funds for the Liaoning Universities (No.LJ212410166046); Major Incubation Program of Shenyang Normal University

Abstract

Abstract: Abstract With the increasing demand for propylene in society, the development of efficient propylene production technology is crucial for both science and economy. Platinum based catalysts have been widely studied in propane dehydrogenation (PDH) reactions due to their high ability to activate propane C-H bonds and selectivity towards propylene. Herein, PtxZn/MSN catalysts with different zinc loadings were prepared by impregnation method using mesoporous silica nanoparticles (MSN) with confinement effect as support, transition metal zinc as a promoter to control the electronic property and geometric structure of platinum. XRD, N2 adsorption-desorption, Raman, CO-DRIFT, SEM, TEM and XPS characterizations were carried out and the PDH performance was tested. When the zinc loading was 0.5 wt%, PtxZn/MSN catalyst showed the highest PDH activity with the initial propane conversion and propylene selectivity of 47.9% and 97.0%, respectively. After 6 hours of reaction, the propane conversion and propylene selectivity of was 45.8% and 97.0% with the propylene production rate was 0.82 mol/min·gcat. The characterization results demonstrated that the addition of Zn divided Pt particles into smaller Pt species, improved Pt dispersion, reduced the occurrence of side reactions, and therefore enhanced the stability of the catalyst.

Key words: Pt-based catalysts, transition metal Zn promoter, mesoporous silica nanoparticles, propane dehydrogenation, propylene

CLC Number:

O643.3

TrendMD:

WANG Wenxin, SHAN Yiou, SONG Jiaxin, FAN Xiaoqiang , YU Xuehua, KONG Lian, XIAO Xia, XIE Zean, ZHAO Zhen. Synthesis of the PtxZn/MSN catalysts and the study of their propane dehydrogenation properties[J]. Chem. J. Chinese Universities, doi: 10.7503/cjcu20250011.

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Synthesis of the PtxZn/MSN catalysts and the study of their propane dehydrogenation properties

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