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Updated: Apr 28, 2026
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Fast Pyrolysis of Biomass Residues in a Twin-screw Mixing Reactor
Published on: September 9, 2016
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Pyrolytic behavior of waste corn cob.
Qing Cao1, Ke-Chang Xie, Wei-Ren Bao
1Key Laboratory for Coal Science and Technology of Shanxi Province and Ministry of Education, Taiyuan University of Technology, No. 79, Yingze West Street, Shanxi 030024, PR China.
Bioresource Technology
|April 15, 2004
Summary
Pyrolysis of corn cob waste at temperatures below 600°C converts it into valuable gas and liquid products. Increasing temperature boosts gas yield while reducing solid and liquid outputs, offering insights into biomass conversion.
Area of Science:
- Biomass Pyrolysis
- Agricultural Waste Valorization
- Thermochemical Conversion
Background:
- Agricultural waste, such as corn cob, presents a significant disposal challenge.
- Valorization of biomass waste through thermochemical processes is crucial for sustainable energy and chemical production.
- Understanding the influence of pyrolysis parameters on product yield and composition is essential for process optimization.
Purpose of the Study:
- To investigate the pyrolysis of corn cob powder in a tube reactor.
- To analyze the composition and yield of gas, liquid, and solid products at varying temperatures (below 600°C) and heating rates.
- To characterize the chemical properties of the liquid products and understand the thermal decomposition behavior.
Main Methods:
- Pyrolysis of corn cob powder in a stainless steel tube reactor under nitrogen atmosphere.
- Analysis of gas products using gas chromatography (GC).
- Identification of liquid products using gas chromatography-mass spectrometry (GC-MS).
- Characterization of liquid products using Fourier transform infrared spectrophotometry (FT-IR).
- Thermal decomposition analysis using differential thermogravimetric analysis (DTG).
Main Results:
- Product yields varied with temperature: solid (23.6-31.6 wt%), liquid (34-40.96 wt%), and gas (27-40.96 wt%), with yields stabilizing above 600°C.
- Gas composition shifted from CO2 and CO (80-95% v/v at 350-400°C) to increased H2, CH4, and hydrocarbons at higher temperatures.
- Liquid products included phenols and furan derivatives, with FT-IR confirming the presence of hydroxyl groups (-OH).
- DTG analysis indicated a two-step thermal decomposition process, influenced by heating rate, which affected activation energy and reaction pathways.
Conclusions:
- Corn cob can be effectively pyrolyzed to produce significant amounts of gas and liquid products.
- Temperature is a key factor influencing product distribution, with higher temperatures favoring gas production.
- The heating rate significantly impacts the kinetics and mechanism of corn cob decomposition, affecting activation energy and reaction order.
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