Controlling the reaction network of Ni/silica derived conversion of bio-oil surrogate guaiacol  

作　　者：Nils Kretzschmar Oliver Busse Markus Seifert 

机构地区：[1]Technische Universität Dresden,Faculty of Chemistry and Food Chemistry,01062 Dresden,Germany

出　　处：《Carbon Resources Conversion》2024年第1期39-60,共22页碳资源转化（英文）

基　　金：supported by the Chair of Inorganic Molecular Chemistry(TU Dresden)by Prof.Dr.Jan J.Weigand.Evonik AG provided the silica carrier material Aerosil380 for research purposes;The Federal State of Saxony(Germany)funded the first author’s work through the Saxon State Scholarship Program;The corresponding author thanks German Research Foundation(DFG)for funding of project SE 2450/2-1(Nbr.507997100).

摘　　要：Replacing fossil carbon sources with green bio-oils is a promising route to switch to a sustainable chemical industry,although their high oxygen contents are challenging.Catalytic hydrodeoxygenation is a favored route to upgrade bio-oils to renewable fuels and basic chemicals.In this work,we investigated Ni/SiO2 catalysts with differing metal dispersity in continuous mode conversion of guaiacol with a statistical experimental design for 250℃to 400℃,2 h up to 5 h time on stream(ToS)and subsequently different residence time besides other parameters.While low temperature(250℃)promotes cyclohexanol formation from guaiacol,high temperature(400℃)inhibits hydrogenation,leading to phenol and methane.For medium temperature(340℃),the selectivity for cyclohexanone increases.Cyclohexanol and cyclohexanone(KA-oil)are the industrial basis for polyamide 6.Furthermore,we clarified the role of 2-methoxycyclohexanol(2MC)in the reaction network towards KA-oil for continuous-mode operation.Statistical analysis was used to predict and optimize product selectivity and yield,leading to the best yield of cyclohexanone/-ol at 327.5℃,low ToS,medium residence time,high particle dispersity,and medium hydrogen pressure(15 bar(g)).

关 键 词：HYDRODEOXYGENATION Design of experiments BIO-OIL Nickel silica catalyst Continuous mode flow reactor KA-oil CYCLOHEXANOL CYCLOHEXANONE 

分 类 号：O64[理学—物理化学]