Comprehensive analysis of zirconium dioxide catalyzed bioethanol conversion to light olefins: From thermodynamics to kinetics

Wei Xia, Yanli Zhang, Chao Ma, Zhenhua Jiang, Xinrui Wang, Kun Chen, Dong Liu and Yanzhen Wang

Energy, 2025, vol. 319, issue C

Abstract: With the increasing depletion of petrochemical resources, how to alleviate energy dependence on petrochemical resources has become a hot topic of concern. This study presents a comprehensive investigation of the ZrO2-catalyzed bioethanol conversion to light olefins. A novel approach using the Matlab self-coding method is proposed for the first time to conduct thermodynamic analysis on the conversion of bioethanol to light olefins. It was found that the optimal reaction temperature for bioethanol to light olefins was 650–750 K, and the water-to-alcohol was 0–2. The pressure can be adjusted according to the temperature. In addition, the kinetics of the conversion of bioethanol to light olefins is studied. It was found that the adsorption enthalpy of ethanol was −134.66 kJ/mol, while the adsorption heat of ethylene and propylene were as high as −86.41 kJ/mol and −96.96 kJ/mol, respectively. And the relationship of adsorption capacity is propylene > ethanol > ethylene > water. In the actual production process, the propylene should be removed in time to avoid affecting the adsorption of ethanol. In this study, a systematic and comprehensive investigation from thermodynamics to kinetics was carried out, providing a theoretical foundation for the application of efficient ZrO2 catalysts.

Keywords: Bioethanol; Light olefins; Zirconia; Thermodynamic analysis; Adsorption (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:319:y:2025:i:c:s0360544225006668

DOI: 10.1016/j.energy.2025.135024

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