Optimization of a membrane process for CO2 capture in the steelmaking industry |
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| Institution: | 1. SINTEF Materials and Chemistry, Process Technology, NO-7465 Trondheim, Norway;2. The Norwegian University of Science and Technology (NTNU), Department of Chemical Engineering, NO-7491 Trondheim, Norway;1. Politecnico di Milano, Department of Energy, Via Lambruschini 4, 20156 Milano, Italy;2. The University of Sydney, School of Chemical and Biomolecular Engineering, NSW 2006, Sydney, Australia;3. University of Edinburgh, School of Engineering, Robert Stevenson Road, Edinburgh EH9 3FB, United Kingdom;1. Lehigh University, Dept. of Mechanical Engineering & Mechanics, USA;2. King Abdulaziz University, Dept. of Mechanical Engineering, Saudi Arabia;3. King Khalid University, Dept. of Mechanical Engineering, Saudi Arabia;1. Department of Chemical Engineering & Energy Sustainability, Faculty of Engineering, Universiti Malaysia Sarawak (UNIMAS), 94300 Kota Samarahan, Sarawak, Malaysia;2. Department of Chemical Engineering, The University of Toledo, 2801 W. Bancroft, Toledo, OH 43606, United States;1. School of Polytechnic and Basic Sciences, University of Naples Federico II, 80126 Naples, Italy;2. Centre for Combustion and CCS, Energy & Power Department, School of Water, Energy and Environment (SWEE), Cranfield University, Cranfield, Bedfordshire MK43 0AL, UK;3. Department of Engineering, Staffordshire University, College Road, Stoke-on-Trent ST4 2DE, UK |
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| Abstract: | Three different types of membranes were experimentally evaluated for CO2 recovery from blast furnace effluents: semi-commercial adsorption selective carbon membranes, in-house tailored carbon molecular sieving membranes, and fixed site carrier (FSC) membranes with amine groups in the polymer backbone for active transport of CO2. In the single gas experiments the FSC membranes showed superior selectivity for CO2 over the other relevant gases (CO, N2 and H2) and high CO2 permeance (productivity). In addition, it is easy to process and handle, relatively inexpensive to produce and the water in the feed gas is an advantage rather than a problem, since the membrane must be humidified during operation. Based on these experiments a simulation study of a full scale process was performed. The technology showed notable low energy cost, even when converted to the thermal equivalent. Total costs for the CO2 recovery unit (CO2 prepared for pipeline transport) were estimated to be in the range 15.0–17.5 €/tonnes CO2. |
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