Role of NiMo Alloy and Ni Species in the Performance of NiMo/Alumina Catalysts for Hydrodeoxygenation of Stearic Acid: A Kinetic Study

Kumar, Pankaj and Maity, Sunil Kumar and Shee, Debaprasad (2019) Role of NiMo Alloy and Ni Species in the Performance of NiMo/Alumina Catalysts for Hydrodeoxygenation of Stearic Acid: A Kinetic Study. ACS Omega, 4 (2). pp. 2833-2843. ISSN 2470-1343

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Abstract

The hydrodeoxygenation (HDO) of vegetable oil and fatty acid is extremely important for the sustainable production of diesel-range hydrocarbons. The present work depicts the role of Ni/Mo (mole) in the performance of alumina-supported NiMo catalysts for the HDO of stearic acid. Both Ni and NiMo alloy coexist in the NiMo catalysts depending on the Ni and Mo content. With increasing Ni/Mo (mole), the NiMo alloy content in the catalyst increases with the simultaneous decrease in the Ni content. The activity of NiMo catalysts thus enhances with increasing Ni/Mo (mole). The reaction follows a decarbonylation route over Ni sites and a HDO route over NiMo alloy species. C17 and C18 alkanes are thus observed as the dominating hydrocarbon product over Ni and NiMo alloy-rich catalysts, respectively. The activity of the NiMo catalyst further enhances with increasing reaction temperature and metal (Ni + Mo) loading. The selectivity to alkanes was, however, not affected by metal loading. A suitable kinetic model was further established based on the reaction mechanism to relate the kinetic data.

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IITH Creators:
IITH CreatorsORCiD
Maity, Sunil Kumarhttps://orcid.org/0000-0002-1832-5060
Shee, DebaprasadUNSPECIFIED
Item Type: Article
Subjects: Chemical Engineering
Divisions: Department of Chemical Engineering
Depositing User: Team Library
Date Deposited: 13 Feb 2019 06:00
Last Modified: 13 Feb 2019 06:03
URI: http://raiith.iith.ac.in/id/eprint/4808
Publisher URL: http://doi.org/10.1021/acsomega.8b03592
OA policy: http://www.sherpa.ac.uk/romeo/issn/2470-1343/
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