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中文摘要：
在丙烷脱氢制丙烯反应过程中，由于焦的沉积使催化剂活性不断降低，而且失活速度很快，催化剂需频繁烧焦再生。在研究了丙烷脱氢催化剂烧焦过程内外扩散影响的基础上，采用内扩散效率因子修正的均匀烧焦物理模型，建立了综合考虑内外扩散影响的绝热固定床非均相动态烧焦数学模型，用于指导反应器的设计和操作优化。通过对Cr2O3／Al2O3脱氢催化剂烧焦过程模拟，可更深人地认识烧焦过程的变化规律。
英文摘要：
In propane dehydrogenation to propene, the catalyst is continuously deactivated owing to coke formation, which needs to be burnt off periodically to regenerate the catalyst. In this paper, an effectiveness factor modified coke burning-off model was used and a dynamic heterogeneous model for the reactor was established, which took into consideration the pore and film diffusion effects. Simulation study showed that there was a large temperature difference between gas and solid. At the beginning of coke burning-off, because the accumulation of reaction heat, the temperature of solid increased rapidly, which was more obvious near the inlet of the reactor. The temperature quickly decreased to the same temperature with gas when the carbon burning was close to completion. Coke burning-off gradually advanced along the bed, and the hot spot of the bed also gradually advanced from inlet to outlet. The hot spot temperature had little change in different bed position.
同期刊论文项目
同项目期刊论文
Density functional study of the chemisorption of C1, C2 and C3 intermediates in propane dissociation
Modeling and Simulation of Coke Combustion Regeneration for Coked Cr2O3/Al2O3 Propane Dehydrogenatio
Characterization of flow regime transition and particle motion using acoustic emission measurement i
Agglomeration detection based on attractor comparison in horizontal stirred bed reactors by acoustic
Experimental evidence for the enhanced cracking activity of n-heptane over steamed ZSM-5/mordenite c
Catalytic hydrogenation of benzene to cyclohexene on Ru(0001) from density functional theory investi
Effect of Water Vapour on the Acidity of ZSM-5 Zeolite Used for Catalytic Cracking of Naphtha to Man
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