CFD-DEM modeling of gas-solid flow and catalytic MTO reaction in a fluidized bed reactor

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	CFD-DEM modeling of gas-solid flow and catalytic MTO reaction in a fluidized bed reactor
	Zhuang, Ya-Qing ; Chen, Xiao-Min ; Luo, Zheng-Hong ; Xiao, Jie ; Luo ZH(罗正鸿)
刊名	http://dx.doi.org/10.1016/j.compchemeng.2013.08.007
	2014-01-10
关键词	DISCRETE PARTICLE SIMULATION TO-OLEFINS PROCESS NUMERICAL-SIMULATION METHANOL CONVERSION GRANULAR-MATERIALS POLYMERIZATION REACTORS PARTICULATE SYSTEMS SAPO-34 CATALYST KINETIC-MODEL LIGHT OLEFINS
英文摘要	National Natural Science Foundation of China [201076171]; National Ministry of Science and Technology of China [2012CB21500402]; State-Key Laboratory of Chemical Engineering of Tsinghua University [SKL-ChE-13A05]; The methanol-to-olefins (MTO) process is currently being implemented successfully in fluidized bed reactors (FBRs) in China. Characterizing the gas-solid flow is crucial in operating MTO FBRs effectively. In this work, a combined discrete element method (DEM) and computational fluid dynamics (CFD) model is developed to describe the gas-solid flow behavior in an MTO FBR. In this model, the particles are modeled using DEM, and the gas is modeled using Navier-Stokes equations. The combined model incorporates the lumped kinetics in the gas phase to achieve the MTO process. Moreover, the combined model can characterize the heat transfer between particles as well as that between the gas and the particles. The distinct advantage of the combined model is that real-time particle activity can be calculated by tracking the motion history of the catalyst particle with respect to heat transfer. The simulation results effectively capture the major features of the MTO process in FBR. Moreover, the simulation results are in good agreement with the classical calculation and experimental data. The particle motion pattern and distributions of a number of key flow-field parameters in the reactor are analyzed based on the validated model. The effects of operating conditions on FBR performance are also investigated. The simulation results show that the particle motion exhibits a typical annulus-core structure, which promotes excellent transfer efficiency. The results also demonstrated that the feed temperature, inlet gas velocity, and feed ratio of water to methanol significantly affect reaction efficiency. (C) 2013 Elsevier Ltd. All rights reserved.
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/89414]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Zhuang, Ya-Qing,Chen, Xiao-Min,Luo, Zheng-Hong,et al. CFD-DEM modeling of gas-solid flow and catalytic MTO reaction in a fluidized bed reactor[J]. http://dx.doi.org/10.1016/j.compchemeng.2013.08.007,2014.
APA	Zhuang, Ya-Qing,Chen, Xiao-Min,Luo, Zheng-Hong,Xiao, Jie,&罗正鸿.(2014).CFD-DEM modeling of gas-solid flow and catalytic MTO reaction in a fluidized bed reactor.http://dx.doi.org/10.1016/j.compchemeng.2013.08.007.
MLA	Zhuang, Ya-Qing,et al."CFD-DEM modeling of gas-solid flow and catalytic MTO reaction in a fluidized bed reactor".http://dx.doi.org/10.1016/j.compchemeng.2013.08.007 (2014).