Co–gasification of coal/biomass blends in 50 kWe circulating fluidized bed gasifier |
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| Affiliation: | 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;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. Ege University, Solar Energy Institute, Izmir, Turkey;2. Ege University, Faculty of Science, Chemistry Department, Izmir, Turkey;1. Department of Chemical and Process Engineering, University of Canterbury, Christchurch, New Zealand;2. CRL Energy Ltd., Lower Hutt, New Zealand;3. Adjunct Professor, School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo, China |
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| Abstract: | This paper reports gasification of coal/biomass blends in a pilot scale (50 kWe) air-blown circulating fluidized bed gasifier. Yardsticks for gasification performance are net yield, LHV and composition and tar content of producer gas, cold gas efficiency (CGE) and carbon conversion efficiency (CCE). Net LHV decreased with increasing equivalence ratio (ER) whereas CCE and CGE increased. Max gas yield (1.91 Nm3/kg) and least tar yield (5.61 g/kg of dry fuel) was obtained for coal biomass composition of 60:40 wt% at 800 °C. Catalytic effect of alkali and alkaline earth metals in biomass enhanced char and tar conversion for coal/biomass blend of 60:40 wt% at ER = 0.29, with CGE and CCE of 44% and 84%, respectively. Gasification of 60:40 wt% coal/biomass blend with dolomite (10 wt%, in-bed) gave higher gas yield (2.11 Nm3/kg) and H2 content (12.63 vol%) of producer gas with reduced tar content (4.3 g/kg dry fuel). |
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| Keywords: | Coal Biomass Co–gasification Syngas Synergy |
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