Cited by 198Thermochemical Biomass Conversion ProcessesMicrowave-Assisted Synthesis and ApplicationsBiodiesel Production and Applications

Microwave-assisted catalytic pyrolysis of switchgrass for improving bio-oil and biochar properties

Mohamed, Badr A., Kim, Chang Soo, Ellis, Naoko, Bi, Xiaotao·2016·Bioresource Technology

Abstract

Solid additives were used as a microwave absorber to improve the low microwave absorption rate of switchgrass going through pyrolysis, and as a catalyst to improve the bio-oil and biochar characteristics. The synergistic effects were manifested in the presence of a mixture of K3PO4 and clinoptilolite or bentonite compared with single catalyst, resulting in increased microwave absorption rate, and improved bio-oil and biochar quality. The sample of microwave heating switchgrass with 10wt.% K3PO4+10wt.% bentonite reached 400°C after 2.8min, compared with 28.8min through conventional heating, producing biochar with increase in BET surface area from 0.33m(2)/g to 76.3m(2)/g compared with conventional heating. Furthermore, water content of the bio-oil reduced from 22.7 to 15.0wt.% compared with biomass mixed with 20wt.% SiC, a chemically-inert microwave absorbing material used to increase microwave heating. Introducing catalysts showed a great potential for accelerating microwave heating and improving bio-oil and biochar qualities.

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Crossref · 10.1016/j.biortech.2015.10.096

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34 of 34 references verified0 citation errors · 0 not checkable

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  • Microwave heating of 10 wt.% K3PO4 + 10 wt.% bentonite reached 400°C after 2.8 min, while conventional heating was 28.8 min, reducing heating time to less than 1/10.

    “The microwave heating of 10 wt.% K3PO4 + 10 wt.% bentonite reached 400°C after 2.8min, while the conventional heating was 28.8min, the heating time of adding microwave was reduced to less than 1/10 of the conventional heating time.”

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Authors
Mohamed, B. A., Kim, C. S., Ellis, N., & Bi, X.
Affiliations
University of British Columbia (CA)
Corresponding author
Bi, Xiaotao
Venue
Bioresource Technology
Publisher
Elsevier BV
Published
2016-02
Volume
201
Pages
121-132
ISSN
0960-8524 (ISSN-L)
OpenAlex
W2210982143
Cited by
198
References
34
Citations by year
2026: 11 · 2025: 23 · 2024: 18 · 2023: 15 · 2022: 26 · 2021: 24 · 2020: 19 · 2019: 15 · 2018: 18 · 2017: 22 · 2016: 7
FWCI
7.78
Type
journal article
Language
en
Open access
closed
Locations
  • Bioresource Technology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Egyptian Ministry of Higher Education
  • Korea Institute of Science and Technology
Topics
  • Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
  • Physical Sciences › Chemistry › Organic Chemistry › Microwave-Assisted Synthesis and Applications
  • Physical Sciences › Engineering › Biomedical Engineering › Biodiesel Production and Applications
Keywords
microwave pyrolysis, switchgrass, bio-oil, biochar, microwave absorbing materials, catalysts, potassium phosphate, clinoptilolite, bentonite, silicon carbide, biochar surface area, biomass conversion
MeSH terms
Bentonite, Catalysis, Charcoal, Hot Temperature, Microwaves, Panicum, Phosphates, Zeolites, Potassium Compounds, Biofuels

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