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OP-19 Selectively aerobic oxidation of biomass derived 5-hydroxymethylfurfural into 5-

hydroxymethyl-2-furancarboxylic acid (HMFCA) catalyzed by montmorillonite K-10 clay immobilized molybdenum acetylacetonate complex

Zehui Zhang 

South-Central University for Nationalities, China zehuizh@mail.ustc.edu.cn

Recently, the research interest in the catalytic conversion of biomass into chemicals and biofuels has been growing. In this study, we have successfully prepared a heterogeneous catalyst (K-10 clay-Mo) by the immobilization of molybdenum acetylacetonate [MoO2(acac)2] on montmorillonite K-10 clay (K-10 clay-Mo). The catalyst showed high catalytic activity in selective oxidation of the aldehyde group of HMF into 5-hydroxymethyl-2-furancarboxylic acid (HMFCA).

K-10 clay-Mo showed high catalytic activity and selectivity on the aerobic oxidation of HMF into HMFCA in comparison with other catalysts. HMFCA could be obtained in a high yield of 86.9% with HMF conversion of 100% after 3 h in toluene. More importantly, the catalyst K-10 clay-Mo could be reused several times without a significant loss of its catalytic activity.

71

OP-20 Design and fabrication of zeolite-based magnetic microstructured catalysts and the

mechanism study on their application for microalgae hydrothermal liquefaction

Junjie Bian*, Lei Guan, Qingyu Bao, Jianghua Dun, Chunhu Li, Lijuan Feng

Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education, Ocean University of China, (Qingdao 266100, Shandong, China)

*Tel: 0532-66782502; Fax: 0532-66782481; E-mail: junjiebian@ouc.edu.cn.  

Hydrothermal liquefaction of the microalgae (without pre-drying and algae oil extraction procedures) for biocrude (bio oil) production is an energy-efficient conversion process. The reaction conditions are milder than those of pyrolysis and gasification. The liquefied biocrude must be upgraded before refining because its oxygen and nitrogen content is much higher than the conventional crude. This study aims to fabricate iron oxide(s)/zeolite core/shell magnetic microstructured catalysts in which the bio oil was “in situ” deoxygenated. The microcell catalyst consists of the shell, modified natural zeolite (clinoptilolite, mordenite, etc.), in which microalgae could be decomposed on the acid sites, and the core, magnetic iron oxide (Fe3O4, Fe2O3), in which the oxygen containing organic compounds could be deoxygenated via hydrolysis or decarboxylation. The catalysts was used for consecutive liquefaction of microalgae with subsequent non-hydrogenation deoxygenation in subcritical water below 300 °C, to obtain high quality bio oil with less oxygen contents. Our considerable efforts were made to tune the active sites on the catalyst, to build the channel for intermediates diffusion, and to characterize the strong interaction between core and shell of the microstructured catalyst, further to study model reactants （glucose, glutamic acid, and lipids）diffusion and kinetics, and to evaluate the activity of microalgae to bio oil. We explored “controlling” the reaction pathway by rational construction of the catalyst, to tackle the major challenges intrinsic to the high efficient conversion of microalgae to low oxygen bio oil on the specific active sites via consecutive reactions, microalgae hydrothermal liquefaction and in situ deoxygenation of biocrude. Optimum