Cheng, F and Dupont, V (2013) Nickel catalyst auto-reduction during steam reforming of bio-oil model compound acetic acid. International Journal of Hydrogen Energy, 38 (35). 15160 - 15172. ISSN 0360-3199
Abstract
Transition metal catalysts widely used in refineries are provided as oxides and require pre-reduction to become activated. The auto-reduction of a NiO/AlO catalyst with acetic acid (HAc) followed by HAc steam reforming was investigated in a packed bed reactor. Effects of temperature and molar steam to carbon ratio (S/C) on reduction kinetics and catalyst performance were analysed. Results showed that a steady steam reforming regime along with complete NiO reduction could be obtained after a coexistence stage of reduction and reforming. A 2D nucleation and nuclei growth model fitted the NiO auto-reduction. The maximum reduction rate constant was attained at S/C = 2. Steam reforming activity of the auto-reduced catalyst was just below that of the H-reduced catalyst, probably attributed to denser carbon filament formation and larger loss of active Ni. Despite this, a H yield of 76.4% of the equilibrium value and HAc conversion of 88.97% were achieved at 750 °C and S/C = 3.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This is the author’s version of a work that was accepted for publication in International Journal of Hydrogen Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Internation Journal of Hydrogen Energy, [Vol 38, Issue 35, (Nov 2013)] DOI10.1016/j.ijhydene.2013.09.111 |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Energy Research Institute (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 01 Nov 2013 15:30 |
Last Modified: | 18 Jan 2018 05:05 |
Published Version: | http://dx.doi.org/10.1016/j.ijhydene.2013.09.111 |
Status: | Published |
Publisher: | Elsevier |
Refereed: | Yes |
Identification Number: | 10.1016/j.ijhydene.2013.09.111 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:76906 |