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Preliminary estimations of energy and cost for CO2 recovery by a membrane flash process utilizing waste thermal energy |
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| Authors: | Kazuhiro Okabe Hiroshi Mano Yuichi Fujioka |
| Institution: | 1. Laboratoire d’étude des systèmes Energétiques Industriels, Département de Pharmacie, Faculté de Médecine, Université Hadj Lakhdar Batna, Algeria;2. MINES ParisTech, Centre Thermodynamique des Procédés – CTP, 35 Rue Saint Honoré, 77305 Fontainebleau, France;3. Thermodynamics Research Unit, School of Chemical Engineering, University of KwaZulu-Natal, Howard College Campus, Durban, South Africa;1. Lappeenranta University of Technology, LUT Green Tech, Laboratory of Green Chemistry, Sammonkatu 12, 50130 Mikkeli, Finland;2. School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology (UNIST), 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan 698-805, Republic of Korea;3. Fibre and Particle Engineering Laboratory, University of Oulu, P.O. Box 4300, FI-90014, Finland;1. School of Civil and Environmental Engineering, Nanyang Technological University, 639798 Singapore, Singapore;2. Singapore Membrane Technology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 637141 Singapore, Singapore;1. Department of Chemical Engineering, Norwegian University of Science and Technology, N-7491 Trondheim, Norway;2. SINTEF Materials and Chemistry, Trondheim, Norway |
| Abstract: | The membrane flash process utilizing waste thermal energy was developed to achieve an energy-saving technology and to substitute it for a conventional regenerator. The operating conditions of the membrane flash at high temperature were studied. The petroleum refining process and iron manufacturing process were proposed for candidate processes that actually had waste energy sources. The DEA concentration and the flashing pressure had optimum values to improve the performance and reduce the energy consumption for CO2 recovery. Energy consumptions and costs for CO2 recovery in the membrane flash and chemical absorption were estimated by a process simulator and discussed under the same conditions. The membrane flash can achieve lower energy capture than the chemical absorption for the above industrial processes. The membrane flash is suitable for the CO2 emission sources that had high CO2 concentration independently of the plant scale. The chemical absorption can be applied if the plant scale is large and also the CO2 concentration is low. |
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