Cited by 70Catalysis for Biomass ConversionThermochemical Biomass Conversion ProcessesBiofuel production and bioconversion

Comparison of hydrochar-and pyrochar-based solid acid catalysts from cornstalk: Physiochemical properties, catalytic activity and deactivation behavior

Liu, Ziyun, Liu, Zhidan·2020·Bioresource Technology

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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Crossref · 10.1016/j.biortech.2019.122477

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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.”
  • 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.”

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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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