| Cracking C5 fraction is an important petro-chemical product,and it contains a large number of properties of active dienes,which mainly includes:the cyclopentadiene,piperylene and isoprene.These components are important chemical raw materials and widely used in industry.At present,the main separation methods of cracking C5 fraction include two polymerization and reactive distillation method.But these methods have the disadvantages of low conversion rate and high cost of equipment,so we need to explore new separation methods of Cracking C5 fraction.In this paper,we use the catalytic reaction distillation process to separate cracking C5fraction and screen HY Molecular Sieve as catalyst,and synthesis of dicyclopentadiene by using cyclopentadiene in an autoclave reacto was studied.The effects of speed,reaction temperature,reaction time and amount of catalyst on the reaction process were investigated.A kinetic model for the catalytic reaction of carbon five fractions was established in accordance by the Characteristics of the reaction process of the two fraction.The kinetic equation of the reaction of catalyzed by cyclopentadiene was obtained by regression calculation of optimal method,as follows:(?)Where the pre-exponential factor A=1.5×10~6,activation energy Ea=6.5×10~4.Temperature range is 60?~100?.The results of this equation can provide data for the simulation of catalytic distillation process for the catalytic distillation process of cracking C5 fraction.On the basis of kinetic studies,the process of cracking C5 fraction catalytic distillation was simulated by using Aspen Plus,and we studied the theoretical stages of the whole tower,feed location,reflux ratio and other factors on the process,and the process was optimized.The optimum conditions are as follows:theoretical stages 80,the feed location30,a reflux ratio of 4.Based on the optimum conditions,cyclopentadiene conversion was up to 96.9%,selectivity was up to 98.8%,and dicyclopentadiene content of the tower kettle was up to 44.3%. |
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