Promoting propane dehydrogenation over PtFe bimetallic catalysts by optimizing the state of Fe species

Bian, Kai; Zhang, Guanghui; Wang, Mingrui; Liu, Shida; Breckner, Christian J.; Dean, David P.; Zhu, Jie; Miller, Jeffrey T.; Hou, Shuandi; Song, Chunshan; Guo, Xinwen

doi:10.1016/j.ces.2023.118748

Promoting propane dehydrogenation over PtFe bimetallic catalysts by optimizing the state of Fe species

Journal Article · Thu Apr 13 00:00:00 EDT 2023 · Chemical Engineering Science

DOI:https://doi.org/10.1016/j.ces.2023.118748· OSTI ID:2423570

Bian, Kai ^[1]; Zhang, Guanghui ^[1]; Wang, Mingrui ^[1]; Liu, Shida ^[2]; ^[3]; ^[3]; Zhu, Jie ^[1]; Miller, Jeffrey T. ^[3]; Hou, Shuandi ^[2]; Song, Chunshan ^[4]; Guo, Xinwen ^[1]

Dalian Univ. of Technology (China)
Sinopec Dalian (Fushun) Research Institute of Petroleum and Petrochemicals (China)
Purdue Univ., West Lafayette, IN (United States)
Dalian Univ. of Technology (China); The Chinese University of Hong Kong, Ma Liu Shui, Shatin (Hong Kong)

Optimizing the structure of Pt-based bimetallic catalysts is of utmost importance toward improving the propane dehydrogenation performance. It is challenging to precisely synthesize uniform PtFe alloy nanoparticles without excess unalloyed Fe species on the support as these Fe species lead to low propylene selectivity, coke deposition, and poor stability. Herein, we report an effective strategy to optimize the structure of PtFe bimetallic catalysts with minimal coke and high turnover frequency (8.2 s^-1). For the optimized catalyst, 1Pt3Fe@S-1, most Fe species is in the framework of the zeolite S-1, which significantly suppresses the formation of coke. In addition, the extra-framework Fe and Pt species encapsulated in the channel of zeolite form uniform PtFe alloy nanoparticles, which significantly improves the C₃H₆ selectivity, catalytic stability, and recycling performance. In conclusion, these findings provide insights into the structure-performance relationship of PtFe bimetallic catalysts and shall be beneficial to future design and optimization of similar catalytic materials.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)

Sponsoring Organization:: CUHK Research Startup Fund; Fundamental Research Funds for the Central Universities; National Natural Science Foundation of China (NSFC); National Science Foundation (NSF); USDOE

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 2423570

Journal Information:: Chemical Engineering Science, Journal Name: Chemical Engineering Science Journal Issue: C Vol. 275; ISSN 0009-2509

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
42 ENGINEERING
Engineering
Propane dehydrogenation reaction
PtFe bimetallic catalysts
Structural optimization
The state of Fe species

Promoting propane dehydrogenation over PtFe bimetallic catalysts by optimizing the state of Fe species

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