Self-sustained catalytic combustion of CO enhanced by micro fluidized bed: stability operation, fluidization state and CFD simulation

作     者：Zirui Zhang Chenhang Zhang Huan Liu Feng Bin Xiaolin Wei Running Kang Shaohua Wu Wenming Yang Hongpeng Xu Zirui Zhang;Chenhang Zhang;Huan Liu;Feng Bin;Xiaolin Wei;Running Kang;Shaohua Wu;Wenming Yang;Hongpeng Xu

作者机构：State Key Laboratory of High-Temperature Gas DynamicsInstitute of MechanicsChinese Academy of SciencesBeijing 100190China School of Engineering ScienceUniversity of Chinese Academy of SciencesBeijing 100049China School of Energy and Power EngineeringDalian University of TechnologyDalian 116000China Department of Mechanical EngineeringNational University of SingaporeSingapore 117575Singapore School of Vehicle and EnergyYanshan UniversityQinhuangdao 066000China 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2023年第17卷第9期

页      面：147-156页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：support from the National Natural Science Foundation of China(No.52176141) 

主　　题：Self-sustained catalytic combustion Carbon monoxide Cu_(1-x)Ce_(x)O_(y) Fluidized bed Computational fluid dynamics 

摘      要：A micro fluidized bed reactor was used to study the self-sustaining catalytic combustion of carbon monoxide(CO).The Cu_(1−x)Ce_(x)O_(y) catalyst,as well as the pure CuO and CeO_(2),are used to investigate the contributing mechanism of different active sites including dispersed CuO and Cu–Ce solid *** ignition temperature(Ti)of CO over these catalysts at a flow rate of 2000 mL/min followed the order:74℃(Cu_(0.5)Ce_(0.5)O_(y))75℃(Cu_(0.25)Ce_(0.75)O_(y))84℃(Cu_(0.75)Ce_(0.25)O_(y))105℃(CuO)500℃(CeO_(2)).Furthermore,the lean combustion limits(equivalence ratioϕ)over these catalysts under the flow rates of 750–3000 mL/min(through fixed,bubbling,and fluidized bed)were also measured,which are Cu_(0.5)Ce_(0.5)O_(y)Cu_(0.25)Ce_(0.75)OyCu_(0.75)Ce_(0.25)O_(y)CuOCeO_(2).The fluidized bed was simulated using the Eulerian two-fluid model(TFM)coupled with a diffusion/kinetic-limited reaction model to evaluate the influence of operation conditions on the self-sustained combustion of *** predicted maximum temperature agreed with the experimental measurements,demonstrating the validity of the kinetic model and simulation *** results of catalytic combustion with increasing CO concentrations suggest that the catalytic combustion reaction could co-exist with the flamed *** a high concentration of CO is used,a blue-purple flame caused by CO combustion appears in the upper part of the fluidized bed,indicating that the range of CO-containing exhaust gas purification could be expanded to a larger range using the fluidized-bed catalytic combustion technique.