Comparison of hydrochar-and pyrochar-based solid acid catalysts from cornstalk: Physiochemical properties, catalytic activity and deactivation behavior
Abstract
Biochar made from biowaste provides renewable carbon precursors for catalysts preparation. Here, solid acid catalysts were prepared through functionalizing biochars produced via hydrothermal and pyrolytic carbonization of cornstalk with -SO 3 H groups. Hydrochar-based catalysts (HAC) and pyrochar-based catalysts (PAC) exhibited significantly different physiochemical properties, catalytic activities and deactivation behaviors. The test of catalytic effects on cellulose degradation uncovered that HAC had a higher density of -SO 3 H but lower surface special area than PAC. Specifically, PAC prepared at 400 °C resulted in the maximum increase of cellulose conversion by 16.00-50.50%. In comparison, the highest yields of glucose (11.14%) and 5-hydroxymethylfurfural (29.54%) were achieved catalyzed via HAC prepared at 240 °C. The results of catalyst deactivation behavior further revealed that used catalysts had an obvious reduction of -SO 3 H density. Interestingly, used HAC-240 catalysts showed similar patterns of weight loss to fresh ones due to its high stability.
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In Liu and Liu, hydrochar produced at 240 °C and sulfonated using concentrated H2SO4 at 150 °C for 12 h showed the highest resistance to carbon deposit.
“According to thermal gravimetric analysis results upon studying the carbon deposition after reaction, hydrochar produced at a temperature of 240 • C and sulfonated using concentrated 2SO 4 at 150 • C for 12 h showed the highest resistance to carbon deposit.”
From Hydrochar: A Review on Its Production Technologies and Applications (2021) · cites this paper as [77]
The introduction of acid groups such as SO3OH or -COOH into the hydrochar matrix is commonly used for hydrochar modification and makes it suitable as a solid acid catalyst for cellulose hydrolysis or biodiesel production.
“The introduction of acid groups such as SO 3 OH or -COOH into the hydrochar matrix is commonly used for hydrochar modification and makes it suitable as a solid acid catalyst for cellulose hydrolysis or biodiesel production.”
From Hydrochar: A Review on Its Production Technologies and Applications (2021) · cites this paper as [77]
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Conversion of biomass to activated carbon and biochar
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Development of an integrated process for biogas production from sugarcane trash
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- Authors
- Liu, Z., & Liu, Z.
- Affiliations
- China Agricultural University (CN)
- Corresponding author
- Liu, Ziyun
- Liu, Zhidan
- Venue
- Bioresource Technology
- Publisher
- Elsevier BV
- Published
- 2020-02
- Volume
- 297
- Pages
- 122477
- ISSN
- 0960-8524 (ISSN-L)
- OpenAlex
- W2991187702
- Cited by
- 70
- References
- 43
- Citations by year
- 2026: 8 · 2025: 9 · 2024: 15 · 2023: 11 · 2022: 10 · 2021: 10 · 2020: 7
- FWCI
- 2.38
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Bioresource Technology (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Natural Science Foundation of China
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Catalysis for Biomass Conversion
- Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
- Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
- Keywords
- hydrochar, pyrochar, solid acid catalysts, corn stalk, sulfonic acid functionalization, hydrothermal carbonization, pyrolysis, cellulose degradation, glucose production, 5-hydroxymethylfurfural, catalyst deactivation, biomass waste valorization, catalyst stability
- MeSH terms
- Carbon, Catalysis, Cellulose, Glucose
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