Gas-phase Cracking Dicyclopentadiene Using Hydrogen as a Carrier Gas

摘要

The process of cracking dicyclopentadiene to produce cyclopentadiene using hydrogen as a carrier gas is investigated. This process has many advantages over using N_2 or water vapor as a carrier gas for producing anhydrous polymerization level dicyclopentadiene. Factors, including cracking temperature, reaction time, and H_2 to oil ratio, are studied. The conversion of dicyclopentadiene increases with the increasing of cracking temperature and reaction time; the yield of cyclopentadiene increases, and then drops a little with the increasing of reaction time. Optimal reaction conditions are as follows: suitable cracking temperature is 320℃, reaction time is 1 sec, and H_2 to oil ratio is 50. Cracking temperature of the process is about 30℃ lower than using N_2 or water vapor as the carrier gas. At the optimal conditions, the conversion of dicyclopentadiene could reach 98%, while the yield of cyclopentadiene is 97%. The reaction kinetic model of the process is also studied, and the model could predict the conversion of dicyclopentadiene well.