Effect of Direct Coal Liquefaction Conditions on Coal Liquid Quality .Jun 2, 2015 . Abstract. Solvent extraction of coal was investigated with a focus on the quality of the coal liquids rather than coal conversion. The aim was to determine how the hydrogen/carbon ratio and other quality measures were influenced by liquefaction conditions. Liquefaction was performed using Canadian.coal liquefaction abstract,Health and environmental effects of coal-liquefaction processes .Abstract. Chemically complex materials produced by several coal-liquefaction processes and under various stages of process design and operating conditions have been screened for potential health and environmental effects. Biologically active materials have been fractionated and rescreened. Chemical constituents of.
Solvent effect on coal liquefaction - ScienceDirectAbstract. Effectiveness of various hydrogen-donor solvents toward coal liquefaction has been investigated by carrying out hydrogenation or hydrogenolysis of coal-related model compounds such as benzophenone, trans-stilbene, anthracene, and 9-benzylphenanthrene. The hydrogen-donatability of the hydroaromatic.coal liquefaction abstract,Coal Liquefaction - Ullmann's Encyclopedia of Industrial Chemistry .Coal Liquefaction. Takao Kaneko1,; Frank Derbyshire2,; Eiichiro Makino3,; David Gray4,; Masaaki Tamura5,; Kejian Li6. Published Online: 15 JUL 2012. DOI: 10.1002/14356007.a07_197.pub2. Copyright © 2002 by Wiley-VCH Verlag & Co. KGaA. Book Title . Abstract. The article contains sections titled:.John Frank
Abstract. Increased demand for liquid transportation fuels coupled with gradual depletion of oil reserves and volatile petroleum prices have recently renewed interest in coal-to-liquids (CTL) technologies. Large recoverable global coal reserves can provide liquid fuels and significantly reduce dependence on oil imports.
Abstract. A flowing solvent reactor for coal liquefaction has been developed, which uses direct electrical resistance heating of the reactor tube wall to achieve rapid, controllable heating. A computerized control system previously developed for a wire‐mesh pyrolysis apparatus is used for temperature control; heating rates.
+1-630-513-7454; Fax: +1-630-513-7454. Received: 14 October 2009 / Accepted: 23 October 2009 / Published: 29 October 2009. Abstract: Direct coal liquefaction has been studied and practiced since the 1930s. It was used in Germany during World War II to produce synthetic fuels when there was no oil allowed into the.
Jun 2, 2015 . Abstract. Solvent extraction of coal was investigated with a focus on the quality of the coal liquids rather than coal conversion. The aim was to determine how the hydrogen/carbon ratio and other quality measures were influenced by liquefaction conditions. Liquefaction was performed using Canadian.
Abstract. Two-stage coal liquefaction offers significant improvements over single-stage processing in terms of product yields. The proposed two-stage operation utilizes an inexpensive and readily available mineral or disposable catalyst in the first stage followed by a commercial hydrotreating catalyst in the second stage.
Dec 19, 2017 . Abstract. Direct and indirect liquefaction technologies for making synthetic liquid fuels from coal are com-pared. It is shown that although direct liquefaction conversion processes might be more energy-efficient, overall system efficiencies for direct and indirect liquefaction are typically comparable if end-use.
Objectives of this effort have been to identify and evaluate long-term health and environmental issues, evaluate options to permit environmentally acceptable design, and assess risk to man and the environment from deployment of a large-scale coal liquefaction industry. Chemically complex materials produced by various.
Jul 14, 2017 . ABSTRACT. Liquefaction experiments on raw coal, extracted coal, and backfill coal of small molecules were carried out, respectively, to study the effects of small molecules on coal liquefaction. The results indicated that small molecules could provide active hydrogen in the liquefaction process, but.
Coal to liquid fuel has the potential to substitute the petroleum fuels due to the huge reserves of coal in the earth, the development of direct coal liquefaction technology and the application of carbon dioxide capture and storage technology. The effect of coal to liquid fuel on the combustion and emission.
SUBTASK 3.3 – FEASIBILITY OF DIRECT COAL LIQUEFACTION IN THE. MODERN ECONOMIC CLIMATE. ABSTRACT. Coal liquefaction provides an alternative to petroleum for the production of liquid hydrocarbon-based fuels. There are two main processes to liquefy coal: direct coal liquefaction. (DCL) and indirect coal.
AbstractAbstract. Liquefaction of coal requires thermal rupture of its carbon–carbon bonds to form free-radical fragments. Before these radicals can recombine or polymerize they must be stabilized by hydrogen atoms usually supplied by a hydrogen-donating solvent or by gaseous hydrogen.
An innovative method for coal liquefaction by using dielectric barrier discharge (DBD) plasma in a short reaction time was developed. Using tetralin as the reaction medium, DBD plasma as the energy source, and a reaction time of 10 min at 140°C, up to 10% of coal was converted to liquid material.
Gasification, Pyrolysis, Syngas Processing and Direct Coal Liquefaction. Abstract. In recent years, Gasification, Pyrolysis, Syngas Processing and Direct Coal Liquefaction have been key technologies for converting biomass to renewable products such as fuels, alcohols and biochemicals. Fluor has carefully developed.
SOLVENT DEGRADATION DURING COAL LIQUEFACTION IN A FLOWING-SOLVENT REACTOR. Abstract. We have previously observed that primary coal extracts recovered from the flowing solvent reactor appeared to be of large molecular mass.Short residence times in the reaction zone following the solubilisation of the.
Abstract. The classic studies of Sol Weller and his collaborators1,2 provided the working model for most American investigations of donor solvent coal liquefaction. The investigations, particularly at what is now the Pittsburgh Energy Research Centre of ERDA, at what is now Conoco Coal Development Company, at Pittsburg.
Abstract · PDF. Abstract. In coal liquefaction process initial coal particle size can be considered as one of the important process parameters. In this work, particles of coal are prepared by pulverisation and separation into different particle size ranges below 45 to 1,000 µm. Since conventional batch autoclave is not suitable for.
Bilal A. Akash*. Department of Mechanical Engineering, College of Engineering, Dhofar University, Salalah, Oman. Abstract. This paper presents a review of various methods coal liquefaction processes; they can be a result of pyrolysis, solvent extraction, direct or indirect coal liquefaction. Bituminous coals are considered to.
Abstract. China's coal-and-chemical industry has long been controversial for its high level of carbon emissions. In the recently released “13th Five-year Plan for Energy”, the coal-to-chemical industry was set a number of key .. liquefaction (direct and indirect), synthetic gas, Coal-to-Olefin and Coal-to-Ethanol. Production.
ABSTRACT. Conventional coal-to-liquids (CTL) technologies require the use of relatively high temperatures (>. 425°C), residence times (minutes), and pressures (> 100 . Division and H Quest, LLC, have developed a novel CTL technology, named Wave Liquefaction™. . Direct coal liquefaction (DCL) technologies span a.