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Catalysis in coal liquefaction : new directions for ...Traduire cette page

Coal liquefaction -- Research. Catalysts. Coal -- Research. More like this: Similar Items Find a copy in the library. Finding libraries that hold this item... Details. Document Type: Book: All Authors / Contributors: Frank J Derbyshire. Find more information about: ISBN: ...

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Chemical Compositional Analysis of Catalytic ...Traduire cette page

Liquefaction residue of Heishan bituminous coal (HLR) was subject to two hydroconversion reactions under 5 MPa initial pressure of hydrogen at 300°C for 3 h, without catalyst and with acid supported catalyst (ASC), respectively. The reaction products were analyzed with gas chromatography/mass spectrometer (GC/MS). The results show that 222 organic compounds were detected totally in the ...

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Hydrothermal liquefaction of Ulva prolifera .Traduire cette page

Hydrothermal liquefaction of Ulva prolifera macroalgae and the influence of base catalysts on products. Yan L(1), Wang Y(2), Li J(2), Zhang Y(3), Ma L(4), Fu F(5), Chen B(2), Liu H(2). Author information: (1)School of Chemistry and Chemical Engineering, Yulin University, Yulin 719000, China; Shaanxi Key Laboratory of Low Metamorphic Coal Clean Utilization, Yulin University, Yulin 719000, China ...

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The catalytic liquefaction of coal in the presence of ...Traduire cette page

Liquefaction experiments have been performed on two Colombian coals under high pressure nitrogen atmospheres in the presence of ethanol and a catalyst of ZnCl2. It was observed that the production of products soluble in toluene and THF increased with reaction temperature and nitrogen pressure. The addition of a partial pressure of 10% hydrogen also increased yields although further increases ...

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Simultaneous liquefaction of a subbituminous coal .Traduire cette page

Molten halide catalysts have been found to have excellent cracking activity towards coal and bitumen-related structures as has been reported in the literature. Upgrading experiments have been carried out in a batch autoclave to study the effectiveness of molten halide catalysts consisting of ZnCl 2 and its mixtures with MoCl 5, on simultaneous liquefaction of a subbituminous coal and ...

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The Effect of an Iron-based Catalyst on Coal .Traduire cette page

Quick coal liquefaction at high temperature is a novel method of coal direct liquefaction, which is based on the initial highly reactive characteristics at the beginning of coal liquefaction reaction and the different chemical bond energy in molecular structure of coal, so the essence of coal liquefaction can be essentially revealed by the method. The catalyst plays a key role in the coal ...

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Direct Coal Liquefaction - Bellona · Fichier PDF

disposable catalyst. The heavy coal liquids produced in this way are hydrotreated in the second stage in the presence of a high-activity catalyst to produce additional distillate. 12 Direct Liquefaction Benefits irect liquefaction efficiency may be higher than indirect technology. One ton of a high volatile bituinto hifor refinery upgrading and blending irect Liquefaction provides high a ...

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The Effect of an Iron-based Catalyst on Coal .Traduire cette page

Quick coal liquefaction at high temperature is a novel method of coal direct liquefaction, which is based on the initial highly reactive characteristics at the beginning of coal liquefaction reaction and the different chemical bond energy in molecular structure of coal, so the essence of coal liquefaction can be essentially revealed by the method. The catalyst plays a key role in the coal ...

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Advantages Direct Coal LiquefactionTraduire cette page

Advanced coal liquefaction catalyst development.Quarterly.Abstract.The objective of this program is to identify advanced coal liquefaction catalyst and operating conditions for use in optimized, two-stage direct coal liquefaction process applications and to experimentally test catalysts in.

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Coal liquefaction and catalysis - ScienceDirectTraduire cette page

01/07/1994 · There appears to be considerable potential for improving the processing and economics of direct coal liquefaction through the development and application of highly dispersed catalysts, where the aims are to promote the process of primary coal dissolution, and produce a solubilized product that can be readily upgraded in a second stage over a supported catalyst.

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Coal utilization - Liquefaction | BritannicaTraduire cette page

Direct liquefaction of coal can be achieved with and without catalysts (represented by R), using high pressures (200 to 700 atmospheres) and temperatures ranging between 425 and 480 °C (800 and 900 °F). In the indirect liquefaction process, coal is first gasified to .

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CN103706381A - Coal liquefaction catalyst and .Traduire cette page

The coal liquefaction catalyst comprises 1-99 wt% of hydroxyl iron oxide and 99-1 wt% of iron sulfide, wherein sulfur in the iron sulfide is 0.46-45 wt% of the total mass of the catalyst. The present invention further provides a method for carrying out coal liquefaction by using the catalyst. The method comprises: adding the coal liquefaction catalyst to a coal oil mixture under an air-free ...

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Novel nanodispersed coal liquefaction catalysts: .Traduire cette page

@article{osti_5186160, title = {Novel nanodispersed coal liquefaction catalysts: Molecular design via microemulsion-based synthesis}, author = {Osseo-Asare, K and Radovic, L R}, abstractNote = {The objective of this project is to pursue the development of highly dispersed and inexpensive catalysts for improved coal solubilization and upgrading of coal liquids.

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Coal Liquefaction - SlideShare

Direct Liquefaction The primary function of the first stage is coal dissolution and is operated either without a catalyst or with only a low-activity disposable catalyst. The heavy coal liquids produced in this way are hydro treated in the second stage with a high-activity catalyst to produce additional distillate.

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Direct Coal Liquefaction - The Coal Guy · Fichier PDF

Coals contain material that can be extracted by various organic solvents at mild conditions. The role of this material in initiating or facilitating liquefaction with dispersed catalysts is not well studied or understood. Observations on mobile phase effects: Similar amount, lower viscosity → greater conversion

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Coal Liquefaction | Student EnergyTraduire cette page

Coal Liquefaction is the process of converting coal to liquid fuels. Coal Liquefaction Definition. The process of coal liquefaction creates synthetic liquid fuels from solid coal as substitutes for various petroleum products. There are two types of liquefaction - direct and indirect Williams R. H., Larson, E. D. (December 2003). A comparison of direct and indirect liquefaction technologies for ...

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Catalysts in coal liquefaction (Conference) | OSTI.GOVTraduire cette page

Currently, catalysts are utilized in coal liquefaction for upgrading of initially dissolved products and refining. Emphasis is on the production of the secondary and finished products only. This function, and the catalysts currently used, is the result of many years of experience in the petroleum ...

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Coal Liquefaction - Kaneko - - Major Reference .Traduire cette page

Abstract The article contains sections titled: 1. Introduction 1.1. Commercial Development 1.2. Historical Background 2. Indirect Coal Liquefaction 2.1. Preparation of Synthesis Gas 2.1.1. Coal Gas...

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Coal liquefaction - WikipediaTraduire cette page
Progresses of coal liquefaction catalysts in Japan ...Traduire cette page

Research and development of catalysts and their performances for coal liquefaction are reviewed, enphasizing the contribution of recent 20 years from Japan. A variety of iron based catalysts were extensively examined to define the pyrrhotite as the active species produced in the liquefaction process. Synthetic pyrite, synthesized hydroxy ferric oxide, finely ground pyrite and limonite have ...

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