Economic assessment of membrane-assisted autothermal reforming for cost effective hydrogen production with CO2 capture |
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| Affiliation: | 1. SINTEF Industry, Trondheim, Norway;2. Norwegian University of Science and Technology, Trondheim, Norway;1. Clean Energy Research Laboratory, Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, Ontario L1H 7K4, Canada;2. Department of Chemical Engineering, Gebze Technical University Gebze 41400 Kocaeli, Turkey;3. Faculty of Engineering and Applied Science, Memorial University of Newfoundland, 240 Prince Phillip Drive St. John''s, Newfoundland and Labrador A1B 3X5, Canada;1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing 400030, PR China;2. Chongqing Key Laboratory of Translational Research for Cancer Metastasis and Individualized Treatment, Chongqing Cancer Hospital & Institute & Cancer Center, Chongqing, 400030, PR China;1. Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Ministry of Education, Chongqing, 400030, PR China;2. Chongqing University Cancer Hospital & Chongqing Cancer Institute & Chongqing Cancer Hospital, Chongqing, 400030, PR China;1. TU Bergakademie Freiberg, Institute of Thermal Engineering, Freiberg, Germany;2. Politecnico di Torino, Department of Applied Science and Technology, Torino, Italy;3. Karlsruhe Institute of Technology, Engler-Bunte-Institute, Division of Combustion Technology, Karlsruhe, Germany;1. Chemical Process Intensification, Eindhoven University of Technology, Department of Chemical Engineering and Chemistry, Eindhoven, The Netherlands;2. Norwegian University of Science and Technology, Department of Energy and Process Engineering, Trondheim, Norway;3. TECNALIA, Energy and Environment/Industry and Transport Divisions, San Sebastián-Donostia, Spain;4. SINTEF Materials and Chemistry, Flow Technology Department, Trondheim, Norway |
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| Abstract: | A recent techno-economic study (Spallina et al., Energy Conversion and Management 120: p. 257–273) showed that the membrane assisted chemical looping reforming (MA-CLR) technology can produce H2 with integrated CO2 capture at costs below that of conventional steam methane reforming. A key technical challenge related to MA-CLR is the achievement of reliable solids circulation between the air and fuel reactors at large scale under the high (>50 bar) operating pressures required for optimal performance. This work therefore presents process modelling and economic assessments of a simplified alternative; membrane assisted autothermal reforming (MA-ATR), that inherently avoids this technical challenge. The novelty of MA-ATR lies in replacing the MA-CLR air reactor with an air separation unit (ASU), thus avoiding the need for oxygen carrier circulation. The economic assessment found that H2 production from MA-ATR is only 1.5% more expensive than MA-CLR in the base case. The calculated cost of hydrogen (compressed to 150 bar) in the base case was 1.55 €/kg with a natural gas price of €6/GJ and an electricity price of €60/MWh. Both concepts show continued performance improvements with an increase in reactor pressure and temperature, while an optimum cost is achieved at about 2 bar H2 permeate pressure. Sensitivities to other variables such as financing costs, membrane costs, fuel and electricity prices are similar between MA-ATR and MA-CLR. Natural gas prices represent the most important sensitivity, while the sensitivity to membrane costs is relatively small at high reactor pressures. MA-ATR therefore appears to be a promising alternative to achieve competitive H2 production with CO2 capture if technical challenges significantly delay scale-up and deployment of MA-CLR technology. The key technical demonstration required before further MA-ATR scale-up is membrane longevity under the high reactor pressures and temperatures required to minimize the cost of hydrogen. |
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| Keywords: | Chemical looping reforming Membranes Autothermal reforming |
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