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Multifluid Modeling of the Desulfurization Process within a Bubbling Fluidized Bed Coal Gasifier
Author(s) -
Armstrong LindsayMarie,
Gu Sai,
Luo Kai H.,
Mahanta Pinakeswar
Publication year - 2013
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.13997
Subject(s) - flue gas desulfurization , wood gas generator , calcination , chemical reactor , coal , waste management , fluidized bed , computational fluid dynamics , chemistry , chemical reaction , chemical engineering , process engineering , thermodynamics , engineering , catalysis , physics , organic chemistry
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 SO x 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 SO 2 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