Abstract: In order to realize the continuous production of high-density jet fuel JP-10, the efficient hydrogenation of dicylcopentadiene (DCPD) to produce endo-tetrahydrodicylcopentadiene (endo-THDCPD) is particularly critical. Therefore, the reaction system of hydrogenation of DCPD to endo-THDCPD was studied. Based on the structural characteristics of nickel silicate, Ni@SiO₂ catalysts with mesopores, Ni(OH)⁺ and nanoscale dispersed Ni were designed to promote the diffusion, adsorption and hydrogenation of DCPD, respectively. The results showed that Ni@SiO₂ could be used as catalyst for hydrogenation of DCPD at room temperature. The hydrogenation activity of Ni@SiO₂ was much higher than that of Raney Ni, and the yield of endo-THDCPD was up to 99.1%. When the reaction temperature was 20-120 ℃, the reaction pressure was 5 MPa, the liquid hourly space velocity was 1 h^-1, and the volume ratio of hydrogen to oil was 100, Ni@SiO₂ also had excellent hydrogenation stability, the conversion of DCPD was 99.9% and the endo-THDCPD yield was more than 92% after running 2 400 h.

Key words: dicyclopentadiene, Ni@SiO₂ catalyst, hydrogenation, endo-tetrahydrodicyclopentadiene