Effect of different gasifying agents (steam,H2O2, oxygen,CO2, and air) on gasification parameters |
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| Affiliation: | 1. Mechanical Engineering Department, Suez Canal University, Ismailia, Egypt;2. INEGI-FEUP, Faculty of Engineering of the University of Porto, Portugal;3. VALORIZA- Research Center for Endogenous Resource Valorisation, Polytechnic Institute of Portalegre, Portugal;4. Department of Basic Science, Cairo University, Giza, Egypt;5. MEAM Department, University of Pennsylvania, PA, 19020, Philadelphia, USA;1. Gebze Technical University, Department of Chemical Engineering, 41400, Gebze, Kocaeli, Turkey;2. ?zmir Katip Celebi University, Department of Environmental Engineering, 35620, Cigli, ?zmir, Turkey;3. Yildiz Technical University, Department of Chemical Engineering, 34210, Esenler, ?stanbul, Turkey;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. Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Qatar Foundation, Doha, Qatar;2. Division of Engineering Management and Decision Sciences, College of Science and Engineering, Hamad Bin Khalifa University, Doha, Qatar;1. School of Mechanical Engineering, College of Engineering, University of Tehran, P.O. Box 11155-4563, Tehran, Iran;2. Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe St. North, Oshawa, Ontario, L1G 0C5, Canada;1. Department of Mechanical Engineering, University of Urmia, Urmia, Iran;2. Faculty of Mechanical Engineering, Urmia University of Technology, Urmia, Iran |
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| Abstract: | Two sensitivity analyses were performed in an Aspen simulation of fluidized bed gasification for five different gasifying agents such as steam, hydrogen peroxide (H2O2), pure oxygen (O2), carbon dioxide (CO2), and air. In the first sensitivity analysis, the modified equivalence ratio (MER) was varied (0.22-0.36). For the varied modified equivalence ratio (MER), %hydrogen, H2/CO molar ratio, and hydrogen yield were the highest in steam-gasification, but %carbon monoxide, %methane, CO yield, and the lower heating values (LHV) were the highest in CO2-gasification. In the second sensitivity analysis, the freeboard temperature was varied (500-900 °C). With increasing freeboard temperature, %hydrogen and %carbon monoxide increased while %carbon dioxide and %methane decreased for all the gasifying agents. Also, with increasing freeboard temperature, the LHV decreased and the hydrogen yield, CO yield, and the gas production rate increased for all the gasifying agents, but the H2/CO molar ratio increased only in oxygen, air, and CO2-gasification. |
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| Keywords: | Gasification Syngas Aspen simulation Lower heating value (LHV) Hydrogen |
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