Multifluid Modeling of the Desulfurization Process within a Bubbling Fluidized Bed Coal Gasifier |
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| Authors: | Lindsay‐Marie Armstrong Sai Gu Kai H Luo Pinakeswar Mahanta |
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| Affiliation: | 1. Energy Technology Research Group, University of Southampton, , Southampton, U.K;2. School of Engineering, Cranfield University, , Bedfordshire, U.K;3. Centre for Combustion Energy, Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Dept. of Thermal Engineering, Tsinghua University, , Beijing, 100084 China;4. Dept. of Mechanical Engineering, Indian Institute of Technology Guwahati, , Pin 781039 India |
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| Abstract: | The desulfurization process to a two‐dimensional (2‐D) and three‐dimensional (3‐D) Eulerian–Eulerian computational fluid dynamic (CFD) model of a coal bubbling fluidized gasifier is introduced. The desulfurization process is important for the reduction of harmful SOx emissions; therefore, the development of a CFD model capable of predicting chemical reactions involving desulfurization is key to the optimization of reactor designs and operating conditions. To model the process, one gaseous phase and five particulate phases are included. Devolatilization, heterogeneous, and homogeneous chemical reactions as well as calcination and desulfurization reactions are incorporated. A calcination‐only model and a calcination plus desulfurization model are simulated in 2‐D and 3‐D and the concentrations of SO2 leaving the reactors are compared. The simulated results are assessed against available published experimental data. The influence of the fluidized bed on the desulfurization is also considered. © 2013 American Institute of Chemical Engineers AIChE J, 59: 1952–1963, 2013 |
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| Keywords: | bubble phenomena coal (gasification desulfurization) two fluid modeling |
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