The exo-tetrahydrodicyclopentadiene (exo-THDCPD) is known as in low freezing point, low viscosity, satisfactory long-term storage stability, and a large volumetric energy content. It can be widely used as rolling oils and solvents for waxes and washing agents for semiconductor. Moreover, exo-THDCPD is a main component of high-energy-density fuel referred to as JP-10, which is a commonly used fuel for small missiles. Presently, exo-THDCPD is commercially produced in a two-step process of hydrogenation and isomerization, respectively. We proposed a one-step process for converting DCPD into exo-THDCPD over Ni/?-Al2O3 and Ni/� zeolite catalysts loaded separately in two-consecutive fixed-bed reactors. The selectivity to exo-THDCPD over 25wt% Ni/?-Al2O3 and 15wt% Ni/� zeolite catalysts was kept around 65% for 200 h while the DCPD was fully converted to the hydrogenated product. The influences of supports (SiO2, Al2O3, ReY, USY, US-ReY, HReY, HY, H�), Ni loading, operating parameters including pressure, temperature, reaction time, velocity, H2/DCPD molar ratio, and solvents on DCPD conversion and the selectivity to exo-THDCPD were investigated. Moreover, based on the XRD, XPS, TG-DSC, NH3-TPD characterizations of catalysts, the fast decrease for the selectivity to exo-THDCPD at the end of the test can be reasonably ascribed to the obvious loss of the acidic sites over � zeolite by coke formation, leading to the unbalanced acidic and metallic catalytic functions.Figure 1.  Synthesis of exo-THDCPD from DCPD.

Directly synthesis of exo-tetrahydrodicyclopentadiene from dicyclopentadiene over Ni/γ-Al<sub>2</sub>O<sub>3</sub> and Ni/β-zeolite catalysts

243rd National Meeting (2012)

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Directly synthesis of exo-tetrahydrodicyclopentadiene from dicyclopentadiene over Ni/γ-Al2O3 and Ni/β-zeolite catalysts

Directly synthesis of exo-tetrahydrodicyclopentadiene from dicyclopentadiene over Ni/γ-Al₂O₃ and Ni/β-zeolite catalysts