Mechanistic Insights into Thermal Stability Improvement of exo-Tetrahydrodicyclopentadiene by 1,2,3,4-Tetrahydroquinoline

Abstract

We investigated the thermal stability of exo-tetrahydrodicyclopentadiene (exo-THDCP, C 10 H 16 ) in the absence and presence of 1,2,3,4-tetrahydroquinoline (THQ), which acts as a hydrogen donor (H-donor). It was found that conversion of exo-THDCP was faster at the higher temperature. The increase in the rate of <C 10 product formation with increasing temperature was higher than that of ≥C 10 . Conversion of exo-THDCP was found to be slowed in the presence of THQ. The THQ-induced decrease in the conversion of exo-THDCP was smaller at the higher temperature. In addition, the THQ-induced decrease in the rate of <C 10 product formation was smaller than that of ≥C 10 . We proposed the mechanism for the thermal decomposition of exo-THDCP, which explains the THQ-induced thermal stability improvement of exo-THDCP and suggests a mechanistic basis for developing effective additives capable of lowering C n product formation at high temperatures.

Thermal Decomposition and Kinetics of a High-Energy-Density Hydrocarbon Fuel: Tetrahydrotricyclopentadiene (THTCPD)

“…Panels i–k of Figure show that methyl- and ethyl-cyclopentane and cis -octahydropentalene increase monotonously with time. They may be formed from the secondary decomposition of JP-10, as evidenced by the presence of them in the thermal decomposition of JP-10 …”

“…They may be formed from the secondary decomposition of JP-10, as evidenced by the presence of them in the thermal decomposition of JP-10. 64 It should be noted that cyclopentylcyclopentane was much more than its olefins (3-cyclopentyl-and 1-cyclopentylcyclopentene), and methyl-and ethyl-cyclopentane and cisoctahydropentalene were much more than those of related olefins (1-methyl-and 1-ethyl-cyclopentene and 1,2,3,3a,4,6ahexahydropentalene) (Figure S4 of the Supporting Information), which agrees well with the conclusion that a high pressure and long residence time are beneficial for the formation of alkanes. 18,57 In this study, benzene and naphthalene are important aromatics to obtain some knowledge of mechanistic insights.…”

Mechanistic Insights into Oxidative Decomposition of exo-Tetrahydrodicyclopentadiene

“…Decomposition of exo-THDCP (100 mL) in the absence and presence of O 2 at various temperatures was carried out in a batch reactor (160 mL) as reported previously. 26 A quartz flask was inserted inside a stainless steel reactor, and a quartz plate was placed on the inside of the stainless steel reactor cover. Quartz was used to block any possible catalytic role of stainless steel or other metals.…”

Effect of hydrophilic silica nanoparticles on hydrate formation: Insight from the experimental study

“…The use of nanoparticles can significantly reduce drilling damage to the reservoir, the risk of borehole wall instability, and the distortion in well logging data. However, the addition of nanoparticles may also introduce new risk, as studies indicated; the addition of solid particles, especially nanoparticles, can facilitate hydrate formation and growth [20,21] . Nanoparticles can become the "seeds" for hydrate nucleation and also increase the thermal conductivity of the drilling fluid [21][22][23][24] , which induces shallow gases or gases from the dissociation of gas hydrates to easily form hydrates in drilling fluid, which causes blockage of circulation channels and borehole accidents.…”