临氢双环戊二烯的裂解过程

实验在连续小试装置上,进行临氢双环戊二烯(DCPD)气相裂解。考察了裂解温度、停留时间及氢气用量对DCPD转化率的影响。实验结果表明,DCPD转化率随裂解温度和停留时间的增加而增大,环戊二烯(CPD)收率先增加后略有下降。适宜的反应条件为:裂解温度320℃、停留时间1 s、氢油体积比50,该反应条件下DCPD转化率达98%,CPD收率达97%。该法的裂解温度较以N_2或水蒸气作载气低30℃左右,结焦现象明显缓解,并简化了生产工艺。反应动力学分析结果表明:临氢DCPD的裂解活化能为77.61 kJ/mol,反应动力学模型可较好地预测临氢DCPD裂解过程。

INVESTIGATION ON DEPOLYMERIZING DICYCLOPENTADIENE USING HYDROGEN AS ELUENT GAS

Aiming at producing high purity anhydrous dicyclopentadiene(DCPD),the process of depolymerizing DCPD in the presence of hydrogen is investigated with a continuous bed reactor.Factors including depolymerization temperature,reaction time and H_2 to oil ratios are studied.Results show that the conversion of DCPD increases,while the yield of cyclopentadiene(CPD)increases first,and then drops slightly with increasing deploymerization temperature and reaction time.The optimal reaction conditions are:deploymerization temperature 320℃,reaction time 1 s and H_2 to oil ratio of 50.Under these conditions,the conversion of DCPD reaches 98%,while the yield of CPD iS 97%.Deploymerization temperature of the process in the presence of H_2 is about 30℃lower than in the presence of N2 or water vapor,and the clogging problem due to the formation of coke is also alleviated.The reaction kinetic model well predicts the conversion of DCPD.