High-Pressure Thermal Decomposition of Tetrahydrotricyclopentadiene (THTCPD) and Binary High-Density Hydrocarbon Fuels of JP-10/THTCPD in a Tubular Flowing Reactor

Abstract

High-pressure thermal decomposition of tetrahydrotricyclopentadiene (THTCPD) and binary high-density hydrocarbon fuels of JP-10/THTCPD were investigated at 500−660 °C and 4.0 MPa in an electrically heated tubular reactor. The decomposition of THTCPD under high temperature, high pressure, and low residence time was conducted to analyze their effects on the products. The experimental results of JP-10/THTCPD pyrolysis show that the THTCPD pyrolysis is greatly easier than the thermal cracking of JP-10, and the addition of JP-10 can significantly promote the THTCPD pyrolysis, which is evidenced by the fact that THTCPD conversion increases up to 80% at 660 °C when blended with 50% JP-10. It may be ascribed to possible reason about the pathway and mechanism of JP-10/THTCPD pyrolysis is that the free radicals generated by the decomposition of THTCPD help to promote the decomposition of JP-10 via H-abstraction reactions. Correspondingly, a large number of new free radicals generated from the JP-10 pyrolysis could also react with JP-10 and THTCPD, which is helpful to promote the decomposition of THTCPD via H-abstraction reaction. Besides, the contribution of THTCPD to JP-10 could also explained by the chemical equilibrium point of view, since JP-10 is one of the products of THTCPD. Meanwhile, the thermal isomerization pathways of THTCPD are also slightly changed in the presence of JP-10. Our experiments could provide necessary information for the potential applications of THTCPD fuels in advanced aircraft.

Kinetic Investigations of the CH (X2Π) Radical Reaction with Cyclopentadiene

“…Likewise, the combustion of many synthetically produced high-energy-density hydrocarbon fuels (HEDHFs), appealing for their efficiency in energy output and decrease in required volume, yield similar products. The thermal decomposition investigations of one such synthetic fuel, tetrahydrotricyclopentadiene (C 10 H 16 ), generates cyclopentadiene and benzene as major products. , Despite the advancements in studying alternative fuel sources, the roles of first hydrocarbon rings like cyclopentadiene and benzene remains persistent.…”

“…The thermal decomposition investigations of one such synthetic fuel, tetrahydrotricyclopentadiene (C 10 H 16 ), generates cyclopentadiene and benzene as major products. 85,86 Despite the advancements in studying alternative fuel sources, the roles of first hydrocarbon rings like cyclopentadiene and benzene remains persistent.…”

Shock Tube/Laser Absorption Measurements of Cyclopentadiene Pyrolysis

“…1,3-Cyclopentadiene (C 5 H 6 , CPD) is both an important intermediate in the combustion of aromatics and a significant product of high energy density fuels such as JP-10 − and biomass fuels such as dimethylfuran. − The decomposition of cyclopentadiene produces, among other species, large amounts of cyclopentadienyl (C 5 H 5 ), a resonance-stabilized radical that is known to lead to polycyclic aromatic hydrocarbon (PAH) formation. − Consisting of multiple aromatic rings, PAHs are common products of fuel combustion and refining; PAHs have been shown to be carcinogenic as well as significant soot precursors and pollutants. ,,− Therefore, understanding the decomposition chemistry of cyclopentadiene will not only aid in furthering modeling efforts to capture the behavior of important fuels but also assist in the overall goal of decreasing soot and atmospheric pollutants by reducing the formation of PAHs.…”

Densities and Viscosities for the Ternary System of exo-Tetrahydrodicyclopentadiene (1) + Methylcyclohexane (2) + Cyclopropanemethanol (3) and Its Binaries at T = 293.15 to 333.15 K

“…The effective improvement of heat of combustion of the fuel can meet the demands of high speed and long running of aircrafts. exo -Tetrahydrodicyclopentadiene (2,3,5-trimethyl­idenebicyclo­[2.2.1]­heptane), also called JP-10, is a typical high energy-density jet fuel for new type aircrafts with high Mach numbers. − It has 14.2% heat of combustion higher than JP-8 which is a petroleum-based fuel . JP-10 was first used by the United States as the fuel for turbojet engines.…”