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Microwave-assisted catalytic pyrolysis of switchgrass for improving bio-oil and biochar properties
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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“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.”
From Modified biochar: synthesis and mechanism for removal of environmental heavy metals (2022) · cites this paper as Mohamed et al. 2016
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Metadata
- 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 › Energy › Fuel Technology › Thermochemical Biomass Conversion Processes
- Physical Sciences › Chemistry › Organic Chemistry › Microwave-Assisted Synthesis and Applications
- Physical Sciences › Energy › Fuel Technology › 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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