Enhancing the selectivity of the hydrogenation of naphthalene to tetralin by high temperature water

Cheng, Yan; Fan, Honglei; Wu, Shuai; Wang, Qian; Guo, Jin; Gao, Liang; Zong, Baoning; Han, Buxing

doi:10.1039/b904305e

Cited by 33 publications

(20 citation statements)

References 46 publications

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“…Our previous work indicated that hydrogen exchange between water and naphthalene occurred during the hydrogenation of the aromatic compound in the presence of water. 17 However, quantitative study of hydrogen exchange between water and organic compounds remains scarce.…”

Section: Hydrogen Transfer Between Water and The Liquid Productsmentioning

confidence: 99%

The effect of supercritical water on the hydroconversion of Tahe Residue

et al. 2010

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The effect of supercritical water (SCW) on the hydroconversion of Tahe residue has been investigated at different temperatures and hydrogen pressures. It was demonstrated that introduction of water into the reaction could reduce the amount of coke formed and increased the yield of liquid product. The isotopic tracer method was used to determine quantitatively the extent of hydrogen exchange between water and the liquid product. The results indicated that the degree of hydrogen exchange of the liquid product with water decreased slightly with increasing hydrogen pressure. About 40% of the water molecules involved in hydrogen exchange with the oil residue as the concentration of water in the reaction mixture was 10 wt %.

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Section: Hydrogen Transfer Between Water and The Liquid Productsmentioning

confidence: 99%

The effect of supercritical water on the hydroconversion of Tahe Residue

et al. 2010

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“…The focus of the controversy is whether the SCW takes part in the transformation of hydrocarbons. A part of previous literature considered SCW as a reactant [59,61,[67][68][69][70], which participated the transformation of hydrocarbons through the direct H-abstraction (H• and HO• donation, known as free a radical mechanism) or hydrolysis (H + and HO − donation, known as an ionic mechanism), while some just regarded SCW as a solvent [35], which only had some physical effects on the transformation of hydrocarbons [71].…”

Section: Mechanisms Of Hydrocarbons Transformationmentioning

confidence: 99%

A Review of Laboratory-Scale Research on Upgrading Heavy Oil in Supercritical Water

Yan

Xiao

2015

Energies

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Abstract:With the growing demand for energy and the depletion of conventional crude oil, heavy oil in huge reserve has attracted extensive attention. However, heavy oil cannot be directly refined by existing processes unless they are upgraded due to its complex composition and high concentration of heteroatoms (N, S, Ni, V, etc.). Of the variety of techniques for heavy oil upgrading, supercritical water (SCW) is gaining popularity because of its excellent ability to convert heavy oil into valued, clean light oil by the suppression of coke formation and the removal of heteroatoms. Based on the current status of this research around the world, heavy oil upgrading in SCW is summarized from three aspects: Transformation of hydrocarbons, suppression of coke, and removal of heteroatoms. In this work, the challenge and future development of the orientation of upgrading heavy oil in SCW are pointed out.

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“…Recently, high temperature water has attracted much attention as environmentally benign media for reactions, such as oxidation, extraction, hydrolysis, gasification,, hydrogenation or dehydrogenation, and lignin carbonization, and synthesis . In the present study, we studied the conversion kinetics of compound 2 and 1 in high temperature water.…”

Section: Figurementioning

confidence: 99%

Reaction Kinetics and Pathways for Salvianolic Acid B in High Temperature Water

Cheng

et al. 2018

ChemistrySelect

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A kinetic model for the production of salvianolic acid A (Sal A) from salvianolic acid B (Sal B) in high temperaturel water was proposed. The kinetic model includes the following key steps: (1) Sal B hydrolysis and decarboxylation to form salvianolic acid A (Sal A); (2) Sal B reversion/polymization to produce humins (polymerized insoluble carbonaceous species); (3) Sal A cyclization to form Sal C; (4) Sal A degradation to produce humins; (5) Sal C degradation to produce procatechuic aldehyde (PA) and danshensu (DSS). From kinetic analysis, relatively high temperatures are essential for maximum Sal A yield and relatively low temperatures are essential for maximum Sal C yield. The reaction model in this study can be used to predict the optimal production conditions for Sal A in the extraction reaction. Moreover, we also studied the extraction yields of Sal A from Salvia miltiorrhiza Bunge. The results showed that this method was suitable for production of Sal A, but there is no obvious advantage for production of Sal C.

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Enhancing the selectivity of the hydrogenation of naphthalene to tetralin by high temperature water

Cited by 33 publications

References 46 publications

The effect of supercritical water on the hydroconversion of Tahe Residue

The effect of supercritical water on the hydroconversion of Tahe Residue

A Review of Laboratory-Scale Research on Upgrading Heavy Oil in Supercritical Water

Reaction Kinetics and Pathways for Salvianolic Acid B in High Temperature Water

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