Catalytic steam co-gasification of biomass and coal in a dual loop gasification system with olivine catalysts |
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| Affiliation: | 1. Henan Engineering Research Center of Resource & Energy Recovery from Waste, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China;2. State Key Laboratory of Fine Chemicals, Institute of Coal Chemical Engineering, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China;1. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China;2. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, 454000, China;1. Hebei Key Laboratory of Heterocyclic Compounds, Handan University, Handan, Hebei, 056005, PR China;2. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001, PR China;1. Faculty of Engineering Technology, University Malaysia Pahang, 26300 Gambang, Pahang, Malaysia;2. Department of Petroleum and Mining Engineering, Jessore University of Science and Technology, Jessore, 7408, Bangladesh;3. Faculty of Chemical and Natural Resources Engineering, University Malaysia Pahang, 26300 Gambang, Pahang, Malaysia;4. College of Electrical and Mechanical Engineering, Addis Ababa Science and Technology University, Ethiopia;5. Department of Mechanical Engineering, Universiti Teknologi Petronas, 32610 Bandar Seri Iskandar, Perak, Malaysia;1. Department of Mechanical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781 039, Assam, India;2. Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781 039, Assam, India;3. Center for Energy, Indian Institute of Technology Guwahati, Guwahati, 781 039, Assam, India |
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| Abstract: | A dual loop gasification system (DLG) has been previously proposed to facilitate tar destruction and H2-rich gas production in steam gasification of biomass. To sustain the process auto-thermal, however, additional fuel with higher carbon content has to be supplied. Co-gasification of biomass in conjunction with coal is a preferred option. Herein, the heat balance of the steam co-gasification of pine sawdust and Shenmu bituminous coal in the DLG has been analyzed to verify the feasibility of the process with the help of Aspen Plus. Upon which, the co-gasification experiments in the DLG have been investigated with olivine as both solid heat carriers and in-situ tar destruction catalysts. The simulation results show that the self-heating of the DLG in the co-gasification is achieved at the coal blending ratio of 28%, gasification circulation ratio of 19 and reforming circulation ratio of 20 when the gasifier temperature 800 °C, reforming temperature 850 °C, combustor temperature 920 °C and S/C 1.1. The co-gasification experiments indicate that the tar is efficiently destructed in the DLG at the optimized reformer temperature and with olivine catalysts. |
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| Keywords: | Co-gasification Tar destruction Dual loop Olivine catalysts Simulation |
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