Effect of Process Parameters on Slow Pyrolysis of Rice Straw: Product Yield and Energy Analysis
Abstract
Slow pyrolysis of rice straw was carried out in a bench-scale fixed bed pyrolysis reactor. The effect of pyrolysis temperatures (300, 400, 500, and 600 °C) and residence time (1, 2, and 3 h) on product yield distribution and energy yield was studied. The biochar yield decreased from 57.87-31.25 wt.% with a rise in pyrolysis temperature and residence time. The percentage of carbon increased from 65.92-86.01%, while the percentage of hydrogen and oxygen decreased from 5.14-1.62% and 25.16-9.77%, respectively, with an increase in temperature and residence time. A similar trend observed in bio-oil characterization. The biochar yield initially increased from 300-500 °C and then reduced. The gas yield gradually increased from 11.91-28.16 %, with a rise in pyrolysis temperature and residence time. The concentration of CO and CO2decreased gradually from 41.81-29.66% and 54.02-38.46%, while H2and CH4increased from 1.9-19.22% and 2.3-10.54%, respectively. The energy yield of biochar decreased from 63.76-39.94%, while bio-oil and gas yield increased from 25.02-40.73 % and 4.96-19.23%, respectively, with an increase in pyrolysis temperature and residence time.
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In pyrolysis, parameters such as temperature, heating rate, particle size, and biomass residence time influence biochar's carbon content and reactivity.
“In pyrolysis, parameters such as temperature, heating rate, particle size, and biomass residence time (BRT) influence biochar's carbon content and reactivity [11].”
Cites
Production, activation, and applications of biochar in recent times
Sakhiya, A. K., Anand, A., & Kaushal, P. (2020) · Biochar · doi:10.1007/s42773-020-00047-1 · Cited by 497 · see citing works
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“…(named as Paddy straw mushroom) , one of the edible rice straw-based mushrooms, is consumed mainly in the Asian region due to its delightful 14.57 Sakhiya et al. (2020) 15.76 Migo-Sumagang et al. (2020) 14.05–14.72 Jung et al. (2008) 16.00 Guillemot et al. (2014) 14.08 Kirubakaran et al. (2009)…”
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“When RS was pyrolyzed at varying temperatures (330–500 °C) and Rt (1, 2, or 3 h), weak chemical bonds broke and more condensable compounds were produced as the pyrolysis temperature increased [109].”
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“However, extending the holding time to 2 h or longer significantly reduces the yield to 30–40%, primarily due to continued devolatilization and mild oxidation remove additional mass 47 .”
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“The TRIOS program was used to analyze the recorded data.”
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“The temperature of pyrolysis further in fl uences morphology; elevated temperatures (exceeding 600 ° C) enhance porosity through the volatilization of organic matter, while lower temperatures (400 – 500 ° C) preserve denser structures at the expense of surface area [13, 23].”
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“Raising the weight of the rice straw may result in insufficient reactant being available for the entire straw to be used in the reaction at a certain reaction volume (Sakhiya et al. 2020).”
Ganesan, A., Barnabé, S., Langlois, S., Rezazgui, O., Bareha, Y., & Boussabbeh, C. (2026) · Energies · doi:10.3390/en19133097 · Cited by 1 · see citing works
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“More intense thermal decomposition of rice straw causes a simultaneous increase in bio-oil and Syngas [11].”
Background
- Authors
- Sakhiya, A. K., Baghel, P., Pathak, S., Vijay, V. K., & Kaushal, P.
- Affiliations
- Indian Institute of Technology Delhi (IN)
- Venue
- 2020 International Conference and Utility Exhibition on Energy, Environment and Climate Change (ICUE)
- Publisher
- IEEE
- Published
- 2020-10-20
- Pages
- 1-9
- OpenAlex
- W3120554689
- Cited by
- 24
- References
- 22
- Citations by year
- 2026: 1 · 2025: 13 · 2024: 2 · 2023: 5 · 2022: 2 · 2021: 1
- FWCI
- 3.63
- Type
- conference paper
- Language
- en
- Open access
- closed
- Licence
- Locations
- International Conference and Utility Exhibition on Energy, Environment and Climate Change (ICUE) (publishedVersion)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
- Physical Sciences › Materials Science › Materials Chemistry › Thermal and Kinetic Analysis
- Physical Sciences › Environmental Science › Pollution › Energy and Environment Impacts
- Keywords
- slow pyrolysis, rice straw, pyrolysis temperature, residence time, biochar yield, bio-oil, pyrolysis gas, energy yield, fixed-bed reactor, biomass conversion
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