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Production of aromatic hydrocarbons by co-cracking of bio-oil and ethanol over Ga_(2)O_(3)/HZSM-5 catalysts

查看全文 作　　者：Xing [1]Zhang;Jingfeng [1]Wu;Junhao [1]Chen;Liang [1]Lu;Lingjun [1]Zhu;Shurong [1]Wang 高影响力作者 机构地区：[1]State Key Laboratory of Clean Energy Utilization,Zhejiang University,Hangzhou 310027,China高影响力机构 出　　处：《Chinese Journal of Chemical Engineering》索引2022年第35卷第6期,共8页高影响力期刊 基　　金：This work was supported by the Innovative Research Groups of the National Natural Science Foundation of China(51621005). 摘　　要：The catalytic cracking of bio-oil is important to produce aromatic hydrocarbons,which can partially replace gasoline or diesel to greatly reduce carbon emissions from transportation.To further promote the formation of aromatic hydrocarbons,this work studied the effects of the preparation method and the acid strength of Ga_(2)O_(3)/HZSM-5 on catalytic cracking of the bio-oil distilled fraction systematically.The preparation method of Ga_(2)O_(3)/HZSM-5 had an important effect on its catalytic activity:the Ga_(2)O_(3)/HZSM-5 prepared by physical mixing showed the low dispersion of active phases and poor pore structure,resulting in its insufficient activity and severe coke deposition;the Ga_(2)O_(3)/HZSM-5 prepared by precipitation exhibited the higher activity,while many polycyclic aromatic hydrocarbons unfavorable for the subsequent utilization were in the oil phase;the Ga_(2)O_(3)/HZSM-5 prepared by impregnation showed the highest activity and 35.5%(mass)selectivity of the oil phase,including 80.3%monocyclic aromatic hydrocarbons and 12.0%polycyclic aromatic hydrocarbons.The Brønsted acidity of Ga_(2)O_(3)/HZSM-5 decreased with Si/Al ratio,leading to the decline in reactant conversion,oil phase selectivity and quality.Meanwhile,the polymerization between monocyclic aromatic hydrocarbons and oxygenates was promoted to produce many polycyclic aromatic hydrocarbons and even coke,causing catalyst deactivation. 关 键 词：Biomass BIOFUEL Co-cracking Catalyst Preparation method Si/Al ratio
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