Techno-economic assessment of a chemical looping reforming combined cycle plant with iron and tungsten based oxygen carriers |
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| Affiliation: | 1. Department of Mechanical Engineering, Masdar Institute, Khalifa University of Science and Technology, P.O. Box 54224, Abu Dhabi, United Arab Emirates;2. Department of Energy and Process Engineering, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway;3. Mechanical Engineering Program, University of Michigan-Flint, Flint, MI 48502, USA;1. Instituto Balseiro, Universidad Nacional de Cuyo, Av. Bustillo 9500, S.C. de Bariloche, Argentina;2. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), CNEA, Centro Atómico Bariloche, Av. Bustillo 9500, S.C. de Bariloche, Argentina;3. Centro Regional Universitario Bariloche, Universidad Nacional del Comahue, Quintral 1250, S.C. de Bariloche, Argentina;1. Mechanical Engineering Department, Ferdowsi University of Mashhad, Mashhad, Iran;2. Mechanical Engineering Department, University of Birjand, Birjand, Iran;1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum at Beijing, Changping, 100249, China;2. The University of Texas at Austin, Austin, TX, 78712, USA;1. School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;2. School of Energy and Power Engineering, Dalian University of Technology, 116023 Dalian, China;3. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | Chemical looping reforming (CLR) is an efficient technology that transforms hydrocarbons into hydrogen (H2) and carbon dioxide (CO2) with the use of an oxygen carrier. The three-reactor CLR (TRCLR) uses natural gas as fuel similar to a conventional steam-methane reforming (SMR) process. In the current study, two of the most suitable oxygen carriers with base metals iron (Fe) and tungsten (W) are investigated. The model of the CLR unit integrated with a combined cycle power plant is developed using Aspen Plus. The results show that the W-based TRCLR plants are 4 %-points more efficient in terms of H2 production efficiency. In terms of electrical efficiency, the Fe-based TRCLR plant produces excess power at an efficiency of 1.6% whereas the W-based plant requires 3% of extra power from the grid. As a result, the Fe-based plant is 2.6 %-points more efficient than the W-based plant in terms of global efficiency. The costs of H2 production for the Fe and W-based plants are estimated to be $1.66/kg and $16.92/kg, respectively. Compared to the SMR process, the cost of H2 production from the Fe-based TRCLR plant is about 31% lower. |
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| Keywords: | Hydrogen production Chemical looping reforming Oxygen carrier Thermodynamic analysis Techno-economics |
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