Prediction of catalyst lifetime from short-term experimental results: A case study on dehydrogenation of heavy n-paraffins over Pt-based catalysts

IF 3.7 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design Pub Date : 2025-02-02 DOI:10.1016/j.cherd.2025.02.001

Farnaz Tahriri Zangeneh, Saeed Sahebdelfar

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引用次数: 0

Abstract

The deactivation behavior of Pt-based catalysts in dehydrogenation of normal paraffins was investigated by different methods to elucidate the long-term behavior from short-term (10–100 h) data. Empirical power-law, kinetic modeling and accelerated deactivation tests were employed for analysis of the rate data. The methods were evaluated for extrapolating the conversion-time data using long-term (700 h) test results (temperature 475˚C, pressure 1.7 bar, H₂/HC=6 mol/mol, liquid hourly space velocity 20 h⁻¹) of a benchmark commercial catalyst in a fixed-bed reactor. The fresh and used catalysts were characterized by BET, XRF and TG-DTA methods. The kinetic model showed superior results in predicting the deactivation trend. It was used to compare the effect of Li and Mg promoters on a multimetallic catalyst. From the kinetic parameters of the model the order of activity was Pt-Sn-In-Mg/Al₂O₃ > Pt-Sn-In/Al₂O₃ > Commercial > Pt-Sn-In-Li/Al₂O₃ and the order of stability was Pt-Sn-In-Li/Al₂O₃ > Pt-Sn-In/Al₂O₃ > Pt-Sn-In-Mg/Al₂O₃ > Commercial.

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来源期刊

Chemical Engineering Research & Design 工程技术-工程：化工

CiteScore

6.10

自引率

7.70%

发文量

623

审稿时长

42 days

期刊介绍： ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering. Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.