Synthesis Of High Density Fuel From Dicyclopentadiene Oligomerization In Continuous-flow Reactor

High-energy density liquid fuel which has high density and large heating value is an effective means to increase the flight range of aircrafts, therefore the synthesis of it has drawn much attention. Generally speaking, the freezing point and viscosity of fuels are high when the density of which is high. The key of the synthesis of high-energy fuel is to design naphthenic hydrocarbon molecule which has low freezing point, and to control the configuration of molecules.This thesis paper is focused on the oligomerization of dicyclopentadiene (DCPD) in continuous-flow reactor. High-energy fuel which has the density higher than 1.0 g/cm3 was synthesized with endo-DCPD as raw materials. Also, the effect and feasibility of catalytic oligomerization of DCPD was discussed.Compared with the batchwise reaction, the continuous-flow reaction was more favorable because it can achieve higher conversion, higher object product yield and superior isomer proportion. The reaction conditions of DCPD thermal oligomerization in continuous-flow reactor was investigated, and the optical one was as followed: DCPD/toluene was 70wt%/30wt% in raw feed, reaction pressure was 1.2~2 MPa, reaction temperature was 140~160°C, reaction residence time was 2.8 min.The reaction mechanism of continuous oligomerization of DCPD in pressure reactor was suggested. The first step was the decomposition of DCPD to CPD, and then the Diels-Alder reaction happened between DCPD and CPD. The isomerization of endo-DCPD to exo-DCPD and the balance reaction between endo-TCPD and exo-TCPD were also involved.Hβwas selected to be the shape-selective catalyst. The use of catalyst could increase the reaction rate, optimize isomer proportion, and lead a new TCPD isomer. Two high-energy fuels with different isomer proportion were obtained. The sample with more exo-isomer showed better low temperature performance. But the viscosity of the fuel was still high for practice. The mixture of this fuels with JP-10 showed an acceptable low temperature property.