Polygeneration of hydrogen and power based on coal gasification integrated with a dual chemical looping process: Thermodynamic investigation |
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| Affiliation: | 1. State Key Laboratory of Coal Combustion, School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;2. Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;3. Japan Coal Energy Center, 3-14-10 Mita, Minato-ku, Tokyo 108-0073, Japan;1. School of Chemical and Biological Engineering, Seoul National University, Seoul 151-744, South Korea;2. Engineering Development Research Center, Seoul National University, Seoul 151-744, South Korea;3. Chemical Engineering Department, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia |
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| Abstract: | This paper assesses, from a thermodynamic perspective, the conversion of coal to power and hydrogen through gasification simultaneously with a dual chemical looping processes, namely chemical looping air separation (CLAS) and water–gas shift with calcium looping CO2 absorption (WGS-CaL). CLAS offers an advantage over other mature technologies in that it can significantly reduce its capital cost. WGS-CaL is an efficient method for hydrogen production and CO2 capture. The three major factors, oxygen to coal (O/C), steam to coal (S/C) and CaO to coal (Ca/C) were analyzed. Moreover, the comparisons of this suggested process and the traditional processes including integrated gasification combined cycle (IGCC), integrated gasification combined cycle with carbon capture and storage (IGCC-CCS) and integrated gasification combined cycle with calcium-based chemical looping (IGCC-CaL) were discussed. And, the exergy destruction analysis of this suggested process has also been calculated. |
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| Keywords: | Polygeneration of hydrogen and power Coal gasification Dual chemical looping process Simulation |
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