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A general, quantitative, kinetic model for coal .Traduire cette page

A model for coal liquefaction has been developed which is based on the concept of the thermal bond cleavage step being rate limiting. The model provides rate laws which describe the preasphaltene, asphaltene, oil and gas time/yield curves for the coal liquefaction process. The quantitative agreement between the derived rate laws and the kinetic data obtained from fifteen publications will be ...

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Government auctions 41 Coal Blocks – What it means?Traduire cette page

Coal gasification or liquefaction refers to the process by which solid coal is converted into fuel gas or liquid fuel. This move will result in significantly lower environment impact while also assisting India to switch to a gas-based economy, according to the Finance Minister. Rs. 50,000 crores has been pledged by the government to develop the infrastructure in coal sector. Coal Bed Methane ...

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Coal liquefaction model studies: free radical chain ...Traduire cette page

Coal liquefaction model studies: free radical chain decomposition of diphenylpropane, dibenzyl ether, and phenethyl phenyl ether via ta.-scission reactions

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Coal Liquefaction - an overview | ScienceDirect TopicsTraduire cette page

Coal Liquefaction. Coal liquefaction was performed in a 350 ml autoclave containing 75 g of solvent, 25 g of coal and 0 or 5 g of Ni-Mo-Al2O3 catalyst and filled with hydrogen at an initial pressure of 0 or 5.9 MPa. It was heated at a heating rate of 10 °C/min and held at 400 °C during the reaction.

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Coal Liquefaction Kinetics | SpringerLinkTraduire cette page

Generally, kinetic models and data for coal liquefaction must be considered as composites of many reactions occurring. This is a consequence of the complex nature of coal and the many thermal and catalytic pathways involved in the liquefaction process. Kinetic data have been obtained for all of the main routes to liquid products from solid coal; namely, pyrolysis, hydrogenation and dissolution ...

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Coal liquefaction - WikipediaTraduire cette page

Indirect coal liquefaction (ICL) processes operate in two stages. In the first stage, coal is converted into syngas (a purified mixture of CO and H 2 gas). In the second stage, the syngas is converted into light hydrocarbons using one of three main processes: Fischer–Tropsch synthesis, methanol synthesis with subsequent conversion to gasoline or petrochemicals, and methanation.

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Coal liquefaction model studies: free radical chain ...Traduire cette page

Coal liquefaction model studies: free radical chain decomposition of diphenylpropane, dibenzyl ether, and phenethyl phenyl ether via ta.-scission reactions

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Direct Coal Liquefaction | SpringerLinkTraduire cette page

It also includes some discussions on the role of catalysts during coal liquefaction and on the use of model compounds for the understanding of coal liquefaction kinetics. Reactor design aspects are covered in a separate paper and will not be repeated here. Keywords Bituminous Coal Coal Liquefaction Liquefaction Process Insoluble Organic Matter NiMo Catalyst These keywords were .

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Coal Liquefaction Kinetics | SpringerLinkTraduire cette page

Generally, kinetic models and data for coal liquefaction must be considered as composites of many reactions occurring. This is a consequence of the complex nature of coal and the many thermal and catalytic pathways involved in the liquefaction process. Kinetic data have been obtained for all of the main routes to liquid products from solid coal; namely, pyrolysis, hydrogenation and dissolution ...

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REACTION ENGINEERING OF COAL LIQUEFACTION · Fichier PDF

The Need for Reaction Engineering in Coal Liquefaction Commercial coal liquefaction plants represent huge investments in capital. For example, the Breckenridge H-Coal plant was sized to produce 80,000 BSD of liquid products and cost estimates were in excess of 2.5 billion dollars in the mid 80's. Small errors in equipment sizing or yield ...

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New Direction to Preconversion Processing for Coal ... · Fichier PDF

In the past, covalently, cross-linked, three-dimensional macromolecular model for coal structure has been widely accepted and specific responses from processes like gasification and liquefaction interpreted accordingly. Recent studies, however, have shown that many coal molecules appear to be physically associated and, therefore, more responsive to secondary interactions than any cross- linked ...

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New Direction to Preconversion Processing for Coal ... · Fichier PDF

In the past, covalently, cross-linked, three-dimensional macromolecular model for coal structure has been widely accepted and specific responses from processes like gasification and liquefaction interpreted accordingly. Recent studies, however, have shown that many coal molecules appear to be physically associated and, therefore, more responsive to secondary interactions than any cross- linked ...

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Hydrogenation reactions of model titanium .Traduire cette page

Used catalyst and reactor deposits from a fixed‐bed coal liquefaction unit show high concentrations of titanium and boron. The titanium was present as anatase, a titania polymorph. Hydrogenation reactions with and without catalyst were performed with model titanium and boron compounds under liquefaction conditions. The catalyst used was Harshaw 0402T 3% CoO – 15% MoO 3 on an alumina ...

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Liquefaction of coal (Patent) | OSTI.GOVTraduire cette page

Liquefaction of coal. Full Record; Other Related Research; Abstract. In a method for the liquefaction of coal which has chlorine containing compounds therein, the method comprises the hydrogenation of the coal in the presence of a catalyst, the improvement which comprises neutralizing the compounds with an alkali metal hydrogen sulfide whereby H/sub 2/S is produced. In a preferred form of the ...

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A Coal-Blending Model: A Tool for Better Coal .Traduire cette page

A coal-blending model has been developed using relationships between coal and coke quality parameters. This coal-blending model gives a least-cost coal blend for the desired coal blend quality in terms of ash, volatile matter, mean maximum reflectance, and coke quality based on the coke strength and ash content. The model takes into account various constraints like coal availability, minimum ...

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NDLI: Flash pyrolysis coal liquefaction process ...Traduire cette page

coal, lignite, and peat ♦ coal tar ♦ hydrogenation ♦ refining ♦ sampling ♦ occidental flash pyrolysis process ♦ process development units ♦ pyrolysis ♦ mathematical models ♦ subbituminous coal ♦ coal ♦ coal liquefaction ♦ material balance ♦ carbonaceous materials ♦ chemical reactions ♦ coal gasification ♦ decomposition ♦ energy sources ♦ fossil fuels ...

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Direct Coal Liquefaction | SpringerLinkTraduire cette page

It also includes some discussions on the role of catalysts during coal liquefaction and on the use of model compounds for the understanding of coal liquefaction kinetics. Reactor design aspects are covered in a separate paper and will not be repeated here. Keywords Bituminous Coal Coal Liquefaction Liquefaction Process Insoluble Organic Matter NiMo Catalyst These keywords were .

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Modeling of coal liquefaction kinetics based on .Traduire cette page

The model is also shown to be applicable when catalysts are present. The product distribution for a particular coal seems to be a function only of the conversion even in the presence of catalysts, as long as the chemical reaction controls the rate of liquefaction.

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(PDF) Coal liquefaction modelling: 2. Parameter .Traduire cette page

PDF | This is the second of three papers on modelling coal liquefaction processes. The first paper presented a kinetic model for the thermal dissolver... | Find, read and cite all the research you ...

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Direct Coal Liquefaction | SpringerLinkTraduire cette page

It also includes some discussions on the role of catalysts during coal liquefaction and on the use of model compounds for the understanding of coal liquefaction kinetics. Reactor design aspects are covered in a separate paper and will not be repeated here. Keywords Bituminous Coal Coal Liquefaction Liquefaction Process Insoluble Organic Matter NiMo Catalyst These keywords were .

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