Cited by 76Catalysis and Hydrodesulfurization StudiesBiodiesel Production and ApplicationsCatalysis for Biomass Conversion

Ni/Co-Natural Clay as Green Catalysts for Microalgae Oil to Diesel-Grade Hydrocarbons Conversion

Soni, Vineet Kumar, Sharma, Pragati R., Choudhary, Ganpat, Pandey, Shubham, Sharma, Rakesh K.·2017·ACS Sustainable Chemistry & Engineering

Abstract

The Ni/Co-natural clay catalysts have been prepared for the conversion of algae oil into diesel-grade hydrocarbons. Methyl oleate was used as a model compound for the present study. Ni/clay catalyst promotes decarboxylation/decarbonylation, whereas remarkable selectivity in hydrodeoxygenation (HDO) is achieved with Co/clay catalysts. Powder XRD and DRS studies of substrate mixed catalysts reveal a more prominent adsorption of substrate molecules over the Ni surface, which results in low HDO selectivity of nickel catalysts by surpassing the essential contribution of acidic sites. The HDO process provides higher carbon atom economy and energy value over decarboxylation/decarbonylation, while further reducing the formation of greenhouse gases such as CO 2 and CH 4 . Total yield of saturated hydrocarbons from algae oil was 84–86 wt % with similar selectivity. The HDO rates of different fatty acids present in algae oil were independent of the fatty acid chain length. The catalysts are cost-effective and recyclable, and metal leaching during hydroprocessing is less than 1 ppm in all cases. This process is advantageous in terms of metal-to-substrate ratio, use of solvents and their concentration, and comparable HDO selectivity over the previously reported catalysts. A hydroprocessing reaction was also performed under solvent free conditions, which could be useful in industrial applications of this approach.

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Crossref · 10.1021/acssuschemeng.7b00659

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Authors
Soni, V. K., Sharma, P. R., Choudhary, G., Pandey, S., & Sharma, R. K.
Affiliations
Indian Institute of Technology Jodhpur (IN)
Corresponding author
Sharma, Rakesh K.
Venue
ACS Sustainable Chemistry & Engineering
Published
2017-05-11
Volume
5
Issue
6
Pages
5351-5359
ISSN
2168-0485 (ISSN-L)
OpenAlex
W2611258516
Cited by
76
References
60
Citations by year
2026: 8 · 2025: 6 · 2024: 8 · 2023: 9 · 2022: 14 · 2021: 11 · 2020: 8 · 2019: 6 · 2018: 4 · 2017: 2
FWCI
4.25
Type
journal article
Language
en
Open access
closed
Locations
ACS Sustainable Chemistry & Engineering (publishedVersion)
Funders
Department of Biotechnology , Ministry of Science and Technology (BT/EB/PANIIT/2012)
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Catalysis and Hydrodesulfurization Studies
  • Physical Sciences › Engineering › Biomedical Engineering › Biodiesel Production and Applications
  • Physical Sciences › Engineering › Biomedical Engineering › Catalysis for Biomass Conversion
Keywords
microalgae oil, biodiesel upgrading, hydrodeoxygenation, decarboxylation, decarbonylation, methyl oleate, fatty acid conversion, catalyst reusability, metal leaching, green catalysts

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