Kinetics of hydrothermal reactions of n-butanol over Pt/Al2O3 catalyst for biopropane fuel gas production

Abstract

Energy defossilisation using drop-in biofuels is an important step towards Net Zero. Producing low-carbon clean-burning propane fuel from biomass provides such additional sustainability benefits. In this work, kinetics of hydrothermal reactions of n-butanol, a biomass-derived feedstock, to produce propane over 5 wt% Pt/Al2O3 catalyst have been studied from 523- 573 K. Experimental data revealed negligible internal and external mass transfer effects and, when fitted to an integral power-rate law equation, gave activation energy of 70 kJ mol−1 (n-butanol reaction order = 1). Furthermore, an appropriate Langmuir-Hinshelwood model was developed, which predicted similar activation energy 62 kJ mol−1. Low adsorption enthalpies for n-butanol (–33.51 kJ mol−1) and water (−18.16 kJ mol−1) indicated weak interactions on the catalyst surface. These agreed with the fast reaction rate of ≈1.0 x 10-5 mol gcat-1 s−1 obtained at ≥ 548 K. As a new research area, generation of such accurate kinetics data will contribute to process development for large-scale biopropane production.

Publication DOI: https://doi.org/10.1016/j.cej.2024.157325
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Energy and Bioproducts Research Institute (EBRI)
Aston University (General)
Additional Information: Copyright © The Author(s). Published by Elsevier B.V. This is an open access article distributed under the terms of the Creative Commons CC-BY license (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. You are not required to obtain permission to reuse this article.
Uncontrolled Keywords: Biobutanol,Biomass,Biopropane,Catalytic hydrothermal reaction,Defossilisation,Reaction kinetics,General Chemistry,Environmental Chemistry,General Chemical Engineering,Industrial and Manufacturing Engineering
Publication ISSN: 1873-3212
Last Modified: 19 Dec 2024 08:23
Date Deposited: 14 Nov 2024 10:38
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Related URLs: https://www.sci ... 8168?via%3Dihub (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2024-12-01
Published Online Date: 2024-11-13
Accepted Date: 2024-10-31
Authors: Hashemnezhad, Sayed Emad
Onwudili, Jude A. (ORCID Profile 0000-0002-5355-9970)
Thornley, Patricia (ORCID Profile 0000-0003-0783-2179)
Simons, Keith E.

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