Effects of Al2O3-based catalysts on bio-oil composition during biomass pyrolysis
Journal of the Taiwan Institute of Chemical Engineers(2024)
摘要
Background
Biomass catalytic pyrolysis is one of the effective methods for biomass utilization. Understanding the compound composition changes in bio-oil from biomass pyrolysis with catalysts is crucial for efficient biomass utilization.
Methods
This study investigated the use of Al2O3-based catalysts with Ce, Fe and Mo as loaded metals for biomass pyrolysis. Detailed analysis was conducted on the influence of Al2O3-based catalysts on bio-oil compound composition during biomass pyrolysis. Furthermore, the reaction mechanism was explored and discussed.
Significant findings
The research found that the introduction of Al2O3-based catalysts increased the residual mass during biomass pyrolysis. And addition of loaded metals promoted oxidation–reduction of surface deposits on the catalyst, decreasing residual mass. Through pyrolysis-gas chromatography/mass spectrometry testing, the introduction of Al2O3-based catalysts reduced phenols, ketones, alcohols and other bio-oil compounds. Phenols showed the highest decrease, with a maximum reduction of 8.63 %. Aldehydes, acids and hydrocarbons showed an increasing trend, with aldehydes exhibiting the highest increase of 11.06 %. Furans and esters remained relatively unchanged. This study will provide guidance for the changes in bio-oil compound composition during biomass pyrolysis and the high-value utilization of bio-oil.
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关键词
Fast pyrolysis,Biomass,Al2O3-based catalysts,Bio-oil,Chemical composition
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