Mechanism of Hydrogen-Transfer Process to Coal and Coal Extract

Curran, G.P.; Struck, R.T.; Gorin, E.

doi:10.1021/i260022a003

Cited by 223 publications

(122 citation statements)

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“…Investigation of hydrogen transfer from a liquid carrier (tetralin) to coal was first described as a free radical reaction with thermal breakage of the coal molecules by Curran et al [126]. They found that the degree of coal conversion was a function of the amount of hydrogen transferred and relatively independent of the solvent composition employed.…”

Section: Hydrogen and Free Radicals Interactionmentioning

confidence: 99%

A Review of Thermal Co-Conversion of Coal and Biomass/Waste

2014

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Abstract:Biomass is relatively cleaner than coal and is the only renewable carbon resource that can be directly converted into fuel. Biomass can significantly contribute to the world's energy needs if harnessed sustainably. However, there are also problems associated with the thermal conversion of biomass. This paper investigates and discusses issues associated with the thermal conversion of coal and biomass as a blend. Most notable topics reviewed are slagging and fouling caused by the relatively reactive alkali and alkaline earth compounds (K 2 O, Na 2 O and CaO) found in biomass ash. The alkali and alkaline earth metals (AAEM) present and dispersed in biomass fuels induce catalytic activity during co-conversion with coal. The catalytic activity is most noticeable when blended with high rank coals. The synergy during co-conversion is still controversial although it has been theorized that biomass acts like a hydrogen donor in liquefaction. Published literature also shows that coal and biomass exhibit different mechanisms, depending on the operating conditions, for the formation of nitrogen (N) and sulfur species. Utilization aspects of fly ash from blending coal and biomass are discussed. Recommendations are made on pretreatment options to increase the energy density of biomass fuels through pelletization, torrefaction and flash pyrolysis to reduce transportation costs.

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Section: Hydrogen and Free Radicals Interactionmentioning

confidence: 99%

A Review of Thermal Co-Conversion of Coal and Biomass/Waste

2014

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“…The mechanism of hydrogen transfer from molecular hydrogen to liquefied products via tetralin was described in detail by Curran et al (1967). Tetralin releases hydrogen in the form of free radicals and transforms into naphthalene.…”

Section: Introductionmentioning

confidence: 99%

Hydroliquefaction of green wastes to produce fuels

Beauchet

Pinard

Kpogbemabou³

et al. 2011

Bioresource Technology

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“…By analogy with coal liquefaction studies, the use of a H-donor solvent [43] for the liquefaction of lignin was proposed in order to improve the hydrogenation and the yield into liquid products. Tetralin is the solvent most often used in this type of study due to its reversible hydrogenation/dehydrogenation capability [44][45][46].…”

Section: Solvolysis (In Organic Solvents)mentioning

confidence: 99%

Thermochemical Conversion of Lignin for Fuels and Chemicals: A Review

Joffres

Laurenti

Charon

et al. 2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Re´sume´-Conversion thermochimique de la lignine en carburants et produits chimiques : une revue -La lignine est une des composantes de la biomasse lignocellulosique potentiellement valorisable comme ressource renouvelable pour la production de carburants ou de produits chimiques. Apre`s se´paration de la matrice lignocellulosique, cette macromole´cule est de nos jours essentiellement utilise´e comme combustible dans l'industrie papetie`re. Outre cette filie`re papetie`re, la production d'e´thanol de seconde ge´ne´ration a`partir de la cellulose aura comme conse´quence la mise a`disponibilite´d'encore plus grandes quantite´s de lignine. De nouvelles applications pourront donc eˆtre propose´es pour l'utilisation de cette bio-ressource. Les diffe´rentes voies thermochimiques : pyrolyse, solvolyse, conversion hydrothermale et hydroconversion envisage´es pour la valorisation de la lignine sont de´crites dans cet article.Abstract -Thermochemical Conversion of Lignin for Fuels and Chemicals: A Review -Lignin is one of the biomass components potentially usable as renewable resource to produce fuels or chemicals. After separation from the lignocellulosic matrix, this macromolecule is nowadays essentially valorized by combustion in paper mills. If second generation ethanol is produced in the future from lignocellulosic biomass, some increasing reserves of lignin will be available in addition to the ones coming from the paper industry. The main thermochemical ways such as pyrolysis, solvolysis, hydrothermal conversion and hydroconversion considered for the valorization of the lignin are reviewed in this article.

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Mechanism of Hydrogen-Transfer Process to Coal and Coal Extract

Cited by 223 publications

References 0 publications

A Review of Thermal Co-Conversion of Coal and Biomass/Waste

A Review of Thermal Co-Conversion of Coal and Biomass/Waste

Hydroliquefaction of green wastes to produce fuels

Thermochemical Conversion of Lignin for Fuels and Chemicals: A Review

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