裂解碳五中环戊二烯热二聚动力学研究

采用不锈钢高压釜对裂解碳五环戊二烯热二聚的工艺条件进行了详细的研究,考察了搅拌速度、聚合温度和聚合时间双环戊二烯收率、异戊二烯损失率的影响.结果表明,当聚合温度大于100℃时,虽然DCPD收率较高,但IP的损失率在13%以上,在综合考虑双环戊二烯收率和异戊二烯损失率情况下,聚合温度应控制在100℃以内,聚合时间控制在10 h以内.建立了裂解碳五中环戊二烯热二聚动力学模型,并结合试验数据,对动力学模型进行了参数估值.经模型检验,所建立的动力学模型是适当的.

Kinetics on cyclopentadiene thermal dimerization of cracking C5 fraction

The technological conditions of cyclopentadiene thermal dimerization in cracking C5 fraction were investigated systematically utilizing stainless steel autoclave.The influences of the stir rate,polymerization temperature and time on dicyclopentadiene yield and the loss rate of isoprene were investigated.The experimental results show that the high yield of dicyclopentadiene was achieved over 100 ℃,but the loss rate of isoprene was too high.In view of the dicyclopentadiene yield and the loss rate of isoprene,the polymerization temperature and time had better control below 100 ℃ and 10h respectively.Based on the model assumptions,the kinetic model of cyclopentadiene thermal dimerization in cracking C5 fraction was built.Moreover,the parameters of kinetic model were obtained by experimental data regression.Through the analysis of statistic test and residual error distribution,the kinetic model was convinced to be adequate.