Modelling of the pyrolysis of tert-butylbenzene in supercritical water

Ederer, H. J.; Kruse, Andrea; Mas, C.; Ebert, Klaus

doi:10.1016/s0896-8446(99)00013-3

Cited by 37 publications

(15 citation statements)

References 24 publications

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“…Detailed kinetic modeling has also been applied for supercritical water gasification systems. Ederer et al [107] have investigated the pyrolysis of tert-butylbenzene in supercritical water, Bühler et al [108] investigated the glycerol decomposition in supercritical water and Castello and Fiori [109] used the detailed kinetic models for the supercritical water oxidation of methanol to model the gasification of methanol in supercritical water. Even though the results are promising, the application of detailed kinetic modeling for real biomass is not viable yet due to the complex nature of real biomass feedstocks.…”

Section: Kinetic Modelingmentioning

confidence: 99%

Supercritical Water Gasification of Biomass: A Literature and Technology Overview

Yakaboylu

Harinck

Smit³

et al. 2015

Energies

183

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Abstract:The supercritical water gasification process is an alternative to both conventional gasification as well as anaerobic digestion as it does not require drying and the process takes place at much shorter residence times; a few minutes at most. The drastic changes in the thermo-physical properties of water from the liquid state to the supercritical state make it a promising technology for the efficient conversion of wet biomass into a product gas that after upgrading can be used as substitute natural gas. The earliest research goes back as far as the 1970s and since then, supercritical water has been the subject of many research works in the field of thermochemical conversion of wet biomass. This article reviews the state of the art of the supercritical water gasification technology starting from the thermophysical properties of water and the chemistry of reactions to the process challenges of such a biomass based supercritical water gasification process plant.

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Section: Kinetic Modelingmentioning

confidence: 99%

Supercritical Water Gasification of Biomass: A Literature and Technology Overview

Yakaboylu

Harinck

Smit³

et al. 2015

Energies

183

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“…SCW accelerated phenylolefin and toluene formation by suppressing other reaction paths and formation of precipitate or char compared to pyrolysis without water. Ding et al 53) carried out the pyrolysis of hexadecane under supercritical conditions and Ederer et al 50) studied the reaction mechanism of t-butylbenzene decomposition in SCW showing that water had no significant effect on the pyrolysis of alkylbenzenes. Very recently, SCWO 54),55) was introduced as an important application of reactions in hydrothermal systems (water at hightemperature and pressure).…”

Section: Upgrading Heavy Oil Using Scwmentioning

confidence: 99%

Removal of Nickel and Vanadium from Heavy Oils Using Supercritical Water

Mandal¹,

Goto

Sasaki

2014

J. Jpn. Petrol. Inst.

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Heavy oils require substantial cracking in order to be economically refined to produce usable products. One major problem affecting the economics of refining heavy oils is the metal compounds contained in many of these oils which poison the catalyst used to crack the oil. Demetallization methods include physical, chemical, electrochemical, catalytic and supercritical water (SCW) techniques. Few of these methods are viable and/or efficient for the demetallization of heavy oil. This paper discusses the SCW based demetallization process by reviewing the open literature. The potential benefits of SCW based demetallization of heavy oils are also explored. Water partial pressure (WPP) has a moderate effect on the reaction of metalloporphyrins (MPs) in SCW; but temperature has a remarkably high effect. Metal removal is sensitive to the conversion of MP and increases exponentially with higher conversion. The kinetics are consistent with first-order dependency on MP disappearance. The reaction mechanism can be explained in terms of the free radical mechanism, but additional experiments and analysis are required to understand the fate of the metal after reaction. This non-catalytic SCW based upgrading process has the potential to allow production of refined fuel from heavy oils.

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“…H-P and -T water is structurally different from ambient liquid water and this difference gives rise to properties that unique to it: the first it behaves like non-polar organic solvent, which cause it a clean medium for chemical reactions [1][2][3]; the second it has density fluctuation, low dielectric properties, and molecular clusters, which cause it an effective medium for energy and mass transfer [4][5][6][7][8][9]; the third it dissociates to form high concentrations of H + and OH À ions, which causes it a powerful catalysis based on acid or alkali, and even a reactant or product participated in chemical reaction [10][11][12][13]. Owing to these unique properties and cleanness for environment, H-P and -T water has greatly potential applications for converting polymers, biomass, and organic wastes to useful raw materials, and the studies of organic matter hydrolysis in H-P and -T water get more and more interesting [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%