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Modelling of adsorption separation of gas mixtures with allowance made for the thermal effects accompanying adsorption: V. Specific patterns of adsorption separation of one substance from a gas mixture in the adiabatic case
Affiliation:1. Department of Chemical Engineering, KTH Royal Institute of Technology, SE-100 44, Stockholm, Sweden;2. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education of China, Tianjin, 300350, China;3. International Cooperation Research Centre of Carbon Capture in Ultra-low Energy-consumption, Tianjin, 300350, China;1. Sino-Danish College, University of Chinese Academy of Sciences, Beijing 100049, China;2. Key Laboratory of Green Process and Engineering, State Key Laboratory of Multiphase Complex System, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;3. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;4. College of Environmental and Energy Engineering, Beijing University of Technology, Beijing 100124, China;5. Sinopec Shanghai Research Institute of Petrochemical Technology, Shanghai 201208, China;1. Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium;2. Université Libre de Bruxelles, Chimie analytique et chimie des interfaces (CHANI), Campus de la Plaine, Bâtiment A, CP255, boulevard du Triomphe, Bruxelles 1050, Belgium;1. School of Science, STEM College, RMIT University, Melbourne, VIC, 3083, Australia;2. School of Technology, University of the Philippines Visayas, Miagao, Iloilo, 5023, Philippines;3. FrieslandCampina, Amersfoort, the Netherlands;4. Food Quality and Design Group, Wageningen University & Research, Wageningen, the Netherlands;1. Department of Chemical Engineering, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden;2. Key Laboratory of Efficient Utilization of Low and Medium Grade Energy (Tianjin University), Ministry of Education of China, Tianjin 300350, China;3. International Cooperation Research Centre of Carbon Capture in Ultra-Low Energy-Consumption, Tianjin 300350, China;4. School of Business, Society and Engineering, Mälardalen University, SE-721 23 Västerås, Sweden
Abstract:The procedure for the elimination of the terms of model equations of non-isothermal adsorption dynamics for multicomponent mixtures that take into account dispersive factors (both the kinetics of mass and heat transfer and longitudinal mixing and longitudinal heat conductance along the adsorber) has been analysed. It is emphasized that the elimination of terms is only valid in the case where conditions ‘F’ (see References 19 and 20) are satisfied. The transformation of the stable frontal patterns into unstable frontal patterns using the Langmuir thermal adsorption equations is shown. The concept of effective thermal diffusion for the adiabatic adsorption of one substance in the mixed kinetic region in the absence of the ‘classical’ thermal diffusion transfer within porous grains of adsorbents is considered. The role and the influence of effective thermal diffusion and diffusion thermal heat and mass transfer on the kinetics and dynamics of adiabatic adsorption have also been analysed. For various thermal models of the adiabatic case simple practical formulae have been obtained for use in calculating the width of heat and mass transfer zones in the real laboratory and in industrial adsorbers.
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