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Production of Benzoic Acid through Catalytic Transformation of Renewable Lignocellulosic Biomass
李全新
Author NameAffiliationE-mail
李全新 中国科学技术大学化学物理系 liqx@ustc.edu.cn 
Abstract:
Benzoic acid is a high-value chemical and important intermediate in chemical industry. This work demonstrated that lignocellulosic biomass (sawdust) was directionally converted into benzoic acid by a three-step process under atmospheric pressure. This process included the catalytic pyrolysis of sawdust into aromatics, followed by the dealkylation of heavier alkylaromatics to toluene and the liquid-phase oxidation of toluene-rich aromatics to benzoic acid. The production of the desired benzoic acid from the sawdust-derived aromatics, with the benzoic acid selectivity of 85.1 C-mol% and nearly complete conversion of toluene, was achieved using the MnO2/NHPI catalyst at 100 oC for 5 h. It was also found adding a small amount of methanol into the feed can efficiently suppress the coke formation and enhance the yield of aromatics. The proposed synthesis route of benzoic acid potentially provides a useful way for the production of the important aromatic chemical using renewable lignocellulosic biomass.
Key words:  lignocellulosic biomass  benzoic acid  catalytic pyrolysis  dealkylation  oxidation.
FundProject:
Production of Benzoic Acid through Catalytic Transformation of Renewable Lignocellulosic Biomass
李全新
摘要:
Benzoic acid is a high-value chemical and important intermediate in chemical industry. This work demonstrated that lignocellulosic biomass (sawdust) was directionally converted into benzoic acid by a three-step process under atmospheric pressure. This process included the catalytic pyrolysis of sawdust into aromatics, followed by the dealkylation of heavier alkylaromatics to toluene and the liquid-phase oxidation of toluene-rich aromatics to benzoic acid. The production of the desired benzoic acid from the sawdust-derived aromatics, with the benzoic acid selectivity of 85.1 C-mol% and nearly complete conversion of toluene, was achieved using the MnO2/NHPI catalyst at 100 oC for 5 h. It was also found adding a small amount of methanol into the feed can efficiently suppress the coke formation and enhance the yield of aromatics. The proposed synthesis route of benzoic acid potentially provides a useful way for the production of the important aromatic chemical using renewable lignocellulosic biomass.
关键词:  lignocellulosic biomass  benzoic acid  catalytic pyrolysis  dealkylation  oxidation.
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