Upgrading Bio-oil Quality via Pressurized Air Pretreatment of Lignocellulosic Biomass

Upgrading Bio-oil Quality via Pressurized Air Pretreatment of Lignocellulosic Biomass

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DOI 10.20900/jsr20250066
刊名
JSR
年,卷(期) 2025, 7(4)
作者
作者单位

School of Agricultural Engineering, Institute of Engineering, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand ;
Center of Excellence in Biomass, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand ;
Department of Industrial Chemistry, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok, Bangkok 10800, Thailand ;

摘要
This study investigates the application of low-temperature pressurized air oxidation as a pretreatment method to enhance the chemical quality of bio-oil derived from lignocellulosic biomass. Rice straw (RS) and eucalyptus wood (EUCA) were subjected to oxidation pretreatment at 250 °C under various pressures (0.1–1.0 MPa) before pyrolysis at 550 °C. The results show that pretreatment under moderate pressures (0.5–1.0 MPa) significantly influenced the chemical composition of the resulting bio-oil. Gas chromatography-mass spectrometry (GC-MS) analysis revealed a reduction in oxygenated compounds, such as alcohols and ketones, and an increase in long-chain aliphatic hydrocarbons such as dodecane and pentadecane. These compositional changes reflect the potential for improved chemical stability and deoxygenation, which are beneficial for downstream fuel upgrading. Although the bio-oil yield decreased with increasing pretreatment severity, the enhancement in chemical quality supports the application of pressurized air oxidation as an effective method for producing upgraded bio-oil from lignocellulosic feedstocks.
Abstract
This study investigates the application of low-temperature pressurized air oxidation as a pretreatment method to enhance the chemical quality of bio-oil derived from lignocellulosic biomass. Rice straw (RS) and eucalyptus wood (EUCA) were subjected to oxidation pretreatment at 250 °C under various pressures (0.1–1.0 MPa) before pyrolysis at 550 °C. The results show that pretreatment under moderate pressures (0.5–1.0 MPa) significantly influenced the chemical composition of the resulting bio-oil. Gas chromatography-mass spectrometry (GC-MS) analysis revealed a reduction in oxygenated compounds, such as alcohols and ketones, and an increase in long-chain aliphatic hydrocarbons such as dodecane and pentadecane. These compositional changes reflect the potential for improved chemical stability and deoxygenation, which are beneficial for downstream fuel upgrading. Although the bio-oil yield decreased with increasing pretreatment severity, the enhancement in chemical quality supports the application of pressurized air oxidation as an effective method for producing upgraded bio-oil from lignocellulosic feedstocks.
关键词
pressurized air oxidation; pressurized air pretreatment; low temperature treatment; bio-oil upgrading; pyrolysis
KeyWord
pressurized air oxidation; pressurized air pretreatment; low temperature treatment; bio-oil upgrading; pyrolysis
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Janewit Wannapeera,Thipsuphin Hinsui,Supachai Jadsadajerm,Pansa Liplap*. Upgrading Bio-oil Quality via Pressurized Air Pretreatment of Lignocellulosic Biomass [J]. Journal of Sustainability Research. 2025; 7; (4). - .

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