Light Alkane Dehydroaromatization over Pt-Zn/HZSM-5 Catalyst with Ultralow Pt Loading

Authors

• Genwei Chen, Dave C. Swalm School of Chemical Engineering
• Anthony Griffin, University of Southern Mississippi
• Zhe Qiang, University of Southern Mississippi
• Hossein Toghiani, Dave C. Swalm School of Chemical Engineering
• Yizhi Xiang, Dave C. Swalm School of Chemical EngineeringFollow

Document Type

Article

Publication Date

5-1-2026

Abstract

Minimizing Pt loading in dehydroaromatization (DHA) catalysts is critical to the cost-efficient transformation of abundant light alkanes for energy and chemical production. Recent studies in our group show that Pt-Zn/HZSM-5 catalysts with Pt loading of 0.001–0.05 wt% (10–500 ppm) are highly active and stable for ethane DHA (J Am Chem Soc 144(26):11831–11839, 2022). Here, we investigated the catalytic behavior of such catalysts, especially with further decreased Pt loading (< 10 ppm), in both propane and ethane DHA. For propane DHA, we show that the bimetallic Pt-Zn/HZSM-5 catalysts with Pt loading of 50–500 ppm are significantly more active and/or stable than the monometallic counterparts. Such enhancement becomes less significant when decreasing Pt loading to ≤10 ppm. For ethane DHA, the mass-specific activity of the Pt-Zn/HZSM-5 catalysts decreases almost linearly with decreasing Pt loading from 10 to 2.5 ppm, indicating a constant molar-specific activity (TOF) of up to 132 s⁻¹ (molethane/molPt). This breakthrough is achieved owing to the formation of [Pt1-Znn]^δ+ ensemble in the micropores of ZSM-5 zeolite.

Publication Title

Topics in Catalysis

Volume

69

Issue

12

First Page

1623

Last Page

1632

Recommended Citation

Chen, G., Griffin, A., Qiang, Z., Toghiani, H., Xiang, Y. (2026). Light Alkane Dehydroaromatization over Pt-Zn/HZSM-5 Catalyst with Ultralow Pt Loading. Topics in Catalysis, 69(12), 1623-1632.
Available at: https://aquila.usm.edu/fac_pubs/22134