Flue gas analysis for biomass and coal co-firing in fluidized bed:process simulation and validation
Daulet Zhakupov
Lyazzat Kulmukanova
Yerbol Sarbassov
Dhawal Shah
Department of Chemical and Materials Engineering,School of Engineering and Digital Sciences,Nazarbayev University,010001 Nur-Sultan,Kazakhstan
摘要：Coal-conversion technologies,although used ubiquitously,are often discredited due to high pollutant emissions,thereby emphasizing a dire need to optimize the combustion process.The co-firing of coal/biomass in a fluidized bed reactor has been an efficient way to optimize the pollutants emission.Herein,a new model has been designed in Aspen Plus? to simultane-ously include detailed reaction kinetics,volatile compositions,tar combustion,and hydrodynamics of the reactor.Validation of the process model was done with variations in the fuel including high-sulfur Spanish lignite,high-ash Ekibastuz coal,wood pellets,and locally collected municipal solid waste(MSW)and the temperature ranging from 1073 to 1223 K.The composi-tion of the exhaust gases,namely,CO/CO2/NO/SO2 were determined from the model to be within 2％of the experimental observations.Co-combustion of local MSW with Ekibastuz coal had flue gas composition ranging from 1000 to 5000 ppm of CO,16.2％-17.2％of C02,200-550 ppm of NO,and 130-210 ppm of SO2.A sensitivity analysis on co-firing of local biomass and Ekibastuz coal demonstrated the optimal operating temperature for fluidized bed reactor at 1148 K with the recommended biomass-to-coal ratio is 1/4,leading to minimum emissions of CO,NO,and S02.
机标关键词：simulationprocessanalysisbiomassco-firingcoalfluefluidized
论文发表日期：2022-08-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：11( 71-81 )
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