LAPSE:2024.1858
Published Article
LAPSE:2024.1858
Catalytic Biomass Transformation to Hydrocarbons under Supercritical Conditions over Nickel Supported on Schungite
August 23, 2024
Abstract
Liquid fuel production from biomass-derived molecules has received great attention due to the diminished fossil fuel reserves, growing energy demand, and the necessity of CO2 emission reduction. The deoxygenation of oils and fatty acids is a promising process to obtain “green” diesel. Herein, we report the results of the study of the deoxygenation of stearic acid to alkanes as a model reaction. Series of Ni-supported on schungite were obtained by precipitation in subcritical water (hydrothermal deposition) and for comparison via wetness impregnation followed, in both cases, by calcination at 500 °C and a reduction in H2 at 300 °C. The catalyst obtained via hydrothermal synthesis showed a three-fold higher specific surface area with a four-fold higher active phase dispersion compared to the catalysts synthesized via conventional impregnation. The catalysts were tested in stearic acid deoxygenation in supercritical n-hexane as the solvent. Under optimized process conditions (temperature of 280 °C, hydrogen partial pressure of 1.5 MPa, and 13.2 mol of stearic acid per mol of Ni), a close to 100% yield of C10−C18 alkanes, containing over 70 wt.% of targeted n-heptadecane, was obtained after 60 min of reaction.
Liquid fuel production from biomass-derived molecules has received great attention due to the diminished fossil fuel reserves, growing energy demand, and the necessity of CO2 emission reduction. The deoxygenation of oils and fatty acids is a promising process to obtain “green” diesel. Herein, we report the results of the study of the deoxygenation of stearic acid to alkanes as a model reaction. Series of Ni-supported on schungite were obtained by precipitation in subcritical water (hydrothermal deposition) and for comparison via wetness impregnation followed, in both cases, by calcination at 500 °C and a reduction in H2 at 300 °C. The catalyst obtained via hydrothermal synthesis showed a three-fold higher specific surface area with a four-fold higher active phase dispersion compared to the catalysts synthesized via conventional impregnation. The catalysts were tested in stearic acid deoxygenation in supercritical n-hexane as the solvent. Under optimized process conditions (temperature of 280 °C, hydrogen partial pressure of 1.5 MPa, and 13.2 mol of stearic acid per mol of Ni), a close to 100% yield of C10−C18 alkanes, containing over 70 wt.% of targeted n-heptadecane, was obtained after 60 min of reaction.
Record ID
Keywords
deoxygenation, green diesel, Ni-catalyst, schungite support, stearic acid
Subject
Suggested Citation
Schipanskaya EO, Stepacheva AA, Markova ME, Bykov AV, Sidorov AI, Matveeva VG, Sulman MG, Kiwi-Minsker L. Catalytic Biomass Transformation to Hydrocarbons under Supercritical Conditions over Nickel Supported on Schungite. (2024). LAPSE:2024.1858
Author Affiliations
Schipanskaya EO: Regional Technological Center, Tver State University, Zhelyabova Str., 33, 170100 Tver, Russia
Stepacheva AA: Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia [ORCID]
Markova ME: Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia
Bykov AV: Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia
Sidorov AI: Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia
Matveeva VG: Regional Technological Center, Tver State University, Zhelyabova Str., 33, 170100 Tver, Russia; Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia [ORCID]
Sulman MG: Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia
Kiwi-Minsker L: Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia; Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerlan
Stepacheva AA: Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia [ORCID]
Markova ME: Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia
Bykov AV: Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia
Sidorov AI: Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia
Matveeva VG: Regional Technological Center, Tver State University, Zhelyabova Str., 33, 170100 Tver, Russia; Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia [ORCID]
Sulman MG: Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia
Kiwi-Minsker L: Department of Biotechnology, Chemistry and Standardization, Tver State Technical University, A. Nikitin Str., 22, 170026 Tver, Russia; Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerlan
Journal Name
Processes
Volume
12
Issue
7
First Page
1503
Year
2024
Publication Date
2024-07-17
ISSN
2227-9717
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Original Submission
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PII: pr12071503, Publication Type: Journal Article
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LAPSE:2024.1858
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https://doi.org/10.3390/pr12071503
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Aug 23, 2024
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