Effect of fuel blend composition on hydrogen yield in co-gasification of coal and non-woody biomass |
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| Affiliation: | 1. Ege University, Solar Energy Institute, Izmir, Turkey;2. Ege University, Faculty of Science, Chemistry Department, Izmir, Turkey;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. Department of Chemical Engineering for Energy Resources, East China University of Science and Technology, Shanghai, 200237, China;2. Key Laboratory of Coal Gasification and Energy, Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, China;1. Department of Mechanical Engineering, Girijananda Chowdhury Institute of Management and Technology, Guwahati, 781017, Assam, India;2. Department of Mechanical 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;4. Department of Chemical Engineering, Indian Institute of Technology Guwahatid, Guwahati, 781 039, Assam, India;1. Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai 200237, PR China;2. Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology, Shanghai 200237, PR China;3. Department of Environmental Science and Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8503, Japan;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 |
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| Abstract: | In this study, torrefaction of sunflower seed cake and hydrogen production from torrefied sunflower seed cake via steam gasification were investigated. Torrefaction experiments were performed at 250, 300 and 350 °C for different times (10–30 min). Torrefaction at 300 °C for 30 min was selected to be optimum condition, considering the mass yield and energy densification ratio. Steam gasification of lignite, raw- and torrefied biomass, and their blends at different ratios were conducted at downdraft fixed bed reactor. For comparison, gasification experiments with pyrochar obtained at 500 °C were also performed. The maximum hydrogen yield of 100 mol/kg fuel was obtained steam gasification of pyrochar. The hydrogen yields of 84 and 75 mol/kg fuel were obtained from lignite and torrefied biomass, respectively. Remarkable synergic effect exhibited in co-gasification of lignite with raw biomass or torrefied biomass at a blending ratio of 1:1. In co-gasification, the highest hydrogen yield of 110 mol/kg fuel was obtained from torrefied biomass-lignite (1:1) blend, while a hydrogen yield from pyrochar-lignite (1:1) blend was 98 mol/kg. The overall results showed that in co-gasification of lignite with biomass, the yields of hydrogen depend on the volatiles content of raw biomass/torrefied biomass, besides alkaline earth metals (AAEMs) content. |
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| Keywords: | Steam gasification Co-gasification Torrefaction Hydrogen |
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