coal liquefaction description

Direct Coal Liquefaction - an overview | ScienceDirect Topics
This direct coal liquefaction process has been piloted by the American Exxon Company at its Baytown Refinery in Texas (Exxon EDS, 1981). The stages of the process are shown in Fig. 4.66.Coal is slurried with hydrogenated recycle oil. The coal-oil slurry is passed via a preheater to a simple reactor at 410 °C together with high pressure hydrogen (150 bar).
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COAL LIQUEFACTION, Volume II - Assessment
Coal liquefaction is the conversion of coal to liquid hydrocarbon products. The major products of most coal liquefaction processes are condensed aromatic liquids; however, some gases and solids are also produced, depending on the type of coal, the
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Direct Coal Liquefaction - mcilvainecompany
2009-9-28 · •DOE support for direct coal liquefaction occurred mainly over the period 1976-2000. • About 90% of total DOE funding of $3.6 billion was spent for the large scale demo program (1976-82) referred to as Phase I, which showed the overall engineering feasibility and applicability of direct liquefaction
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Coal Liquefaction - Kaneko - - Major Reference Works ...
2001-9-15 · 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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Direct coal liquefaction process - Energy and ...
1992-2-27 · This invention relates to coal liquefaction processing. Coal liquefaction is of course known. Direct liquefaction is a process in which coal is converted to liquid products. This is accomplished by adding hydrogen to coal that has been slurried in a solvent, with the hydrogen addition taking place at elevated temperatures and pressures.
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Coal Liquefaction - Kaneko - - Major Reference Works ...
2012-7-15 · Request permissions. Takao Kaneko. Mitsubishi Chemical Corp., Takasago Coal Liquefaction Center of Kobe Steel Ltd., Hyogo, Japan, 676–8670. Search for more papers by this author. Frank Derbyshire. The Pennsylvania State University, University Park, United States. Search for more papers by this author. Eiichiro Makino.
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Coal Conversion Processes: Gasification and Liquefaction ...
1982-1-1 · In principle, the process of coal liquefaction involves chemical compounds which also occur in other carbochemical or petrochemical processes. It is well known that a number of these substances may be carcinogenic, teratogenic or mutagenic. The concentration of benzo(a)pyrene in coal liquefaction products can be between 50 and 60 μg g −1.
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A characterization and evaluation of coal liquefaction ...
The objectives of this project are to support the DOE direct coal liquefaction process development program and to improve the useful application of chemical analyses to direct coal liquefaction process development. Independent analyses by well-established methods are obtained of samples produced in direct coal liquefaction processes under evaluation by DOE.
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Coal Gasification and Liquefaction - INSIGHTSIAS
2020-9-1 · Topics Covered: Infrastructure- energy. Coal Gasification and Liquefaction: Context: Union Minister of Coal and Mines recently addressed a webinar on Coal Gasification and Liquefaction. He said; India aims for 100 million tonnes (MT) coal gasification by 2030 with investments worth over Rs. 4 lakh crores. For encouraging use of clean sources of fuel,
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Characterization of coal liquefaction heavy products using ...
2019-5-25 · Solubility Limitations in the Determination of Molecular Mass Distributions of Coal Liquefaction and Hydrocracking Products: 1-Methyl-2-pyrrolidinone as Mobile Phase in Size Exclusion Chromatography. Energy & Fuels 1996, 10 (3) , 743-750. DOI: 10.1021/ef950207r.
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Coal Liquefaction - an overview | ScienceDirect Topics
Brown coal liquefaction technology is intended realize the liquefaction of brown coal of Victoria, Australia, with the object of utilizing it as an energy resource. Research and Development was started in 1981 with a 50 t/d pilot plant in Victoria province. Fig. 4.68 shows the process. The initial goals of the project, 50% liquid fuel yield (actual result was 52%) and long-term operation with ...
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Direct Coal Liquefaction - an overview | ScienceDirect Topics
This direct coal liquefaction process has been piloted by the American Exxon Company at its Baytown Refinery in Texas (Exxon EDS, 1981). The stages of the process are shown in Fig. 4.66.Coal is slurried with hydrogenated recycle oil. The coal-oil slurry is passed via a preheater to a simple reactor at 410 °C together with high pressure hydrogen (150 bar).
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Liquefaction of coal - Exxon Research and Engineering
Description of the Prior Art . Coal liquefaction processes in which the feed coal is first contacted with molecular hydrogen and a hydrogen-donor solvent in a liquefaction zone at elevated temperature and pressure and a portion of the liquid product is then catalytically hydrogenated in a solvent hydrogenation zone to generate solvent for ...
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Coal liquefaction - The United States of America as ...
The FIGURE is a molecular formula illustrating the typical organic moieties found in coal. DETAILED DESCRIPTION OF THE INVENTION. A better understanding of the present invention is obtained by reference to the FIGURE, which is taken from Wolk et al Desulfurization and Denitrogenation in Coal Liquefaction.
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Direct coal liquefaction process - Energy and ...
1992-2-27 · This invention relates to coal liquefaction processing. Coal liquefaction is of course known. Direct liquefaction is a process in which coal is converted to liquid products. This is accomplished by adding hydrogen to coal that has been slurried in a solvent, with the hydrogen addition taking place at elevated temperatures and pressures.
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Environmental Assessment of Coal Liquefaction: Annual
Coal liquefaction is not a new technology, but dates back to the early part of the twentieth century and in principle even further than that. With the entry into an era of declining petroleum re- serves, reduced discoveries, escalation of prices, and real or induced shortages, coal liquefaction technology has once more assumed a major role as a ...
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Coal Liquefaction - Kaneko - - Major Reference Works ...
2001-9-15 · References. Request permissions. Takao Kaneko. Mitsubishi Chemical Corp., Takasago Coal Liquefaction Center of Kobe Steel Ltd., Hyogo 676–8670, Japan. Search for more papers by this author. Frank Derbyshire. The Pennsylvania State University, University Park, Pennsylvania 16802, United States.
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Coal Liquefaction - Kaneko - - Major Reference Works ...
2012-7-15 · Request permissions. Takao Kaneko. Mitsubishi Chemical Corp., Takasago Coal Liquefaction Center of Kobe Steel Ltd., Hyogo, Japan, 676–8670. Search for more papers by this author. Frank Derbyshire. The Pennsylvania State University, University Park, United States. Search for more papers by this author. Eiichiro Makino.
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US Patent for Coal liquefaction Patent (Patent # 4,522,700 ...
In a two-stage liquefaction wherein coal, hydrogen and liquefaction solvent are contacted in a first thermal liquefaction zone, followed by recovery of an essentially ash free liquid and a pumpable stream of insoluble material, which includes 850.degree. F.+ liquid, with the essentially ash free liquid then being further upgraded in a second liquefaction zone, the liquefaction solvent for the ...
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Coal Gasification and Liquefaction - INSIGHTSIAS
2020-9-1 · Topics Covered: Infrastructure- energy. Coal Gasification and Liquefaction: Context: Union Minister of Coal and Mines recently addressed a webinar on Coal Gasification and Liquefaction. He said; India aims for 100 million tonnes (MT) coal gasification by 2030 with investments worth over Rs. 4 lakh crores. For encouraging use of clean sources of fuel,
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Liquefaction of coal - Exxon Research and Engineering
Description of the Prior Art . Coal liquefaction processes in which the feed coal is first contacted with molecular hydrogen and a hydrogen-donor solvent in a liquefaction zone at elevated temperature and pressure and a portion of the liquid product is then catalytically hydrogenated in a solvent hydrogenation zone to generate solvent for ...
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Coal liquefaction - The United States of America as ...
The FIGURE is a molecular formula illustrating the typical organic moieties found in coal. DETAILED DESCRIPTION OF THE INVENTION. A better understanding of the present invention is obtained by reference to the FIGURE, which is taken from Wolk et al Desulfurization and Denitrogenation in Coal Liquefaction.
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Coal Liquefaction - Kaneko - - Major Reference Works ...
2012-7-15 · Request permissions. Takao Kaneko. Mitsubishi Chemical Corp., Takasago Coal Liquefaction Center of Kobe Steel Ltd., Hyogo, Japan, 676–8670. Search for more papers by this author. Frank Derbyshire. The Pennsylvania State University, University Park, United States. Search for more papers by this author. Eiichiro Makino.
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Characterization & evaluation of coal liquefaction
2019-7-25 · In support of the DOE direct coal liquefaction effort (under U.S. DOE Contract Nos. DE-AC22-89PC89883 and DE-AC22-94PC93054), net products and distillation cuts of those products from two modern, catalytic, integrated two-stage coal liquefaction facilities were collected and subjected to petroleum inspection tests.
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Coal Liquefaction - Kaneko - - Major Reference Works ...
2001-9-15 · References. Request permissions. Takao Kaneko. Mitsubishi Chemical Corp., Takasago Coal Liquefaction Center of Kobe Steel Ltd., Hyogo 676–8670, Japan. Search for more papers by this author. Frank Derbyshire. The Pennsylvania State University, University Park, Pennsylvania 16802, United States.
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11.11-2 EMISSION FACTORS 2/80
2021-6-25 · liquefaction plant. These coal liquefaction processes consist of 4 basic operations: coal pretreatment, dissolution and liquefaction, product separation and purification, and residue gasification. Coal pretreatment generally consists of coal pulverizing and drying. The dissolution of coal is best effected if the coal is dry and finely ground.
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Coal liquefaction bottoms conversion by coking and ...
2. Description of the Prior Art: Processes for the liquefaction of coal and similar carbonaceous solids normally involve contacting the feed material with a hydrocarbon solvent and molecular hydrogen at elevated temperature and pressure.
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(PDF) An Overview of Coal Hydrogenation
Process Description ... These results show that the solvent/coal ratio of the feed slurry in the brown coal liquefaction process should be small when the
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Coal Gasification - EOLSS
2017-1-16 · COAL, OIL SHALE, NATURAL BITUMEN, HEAVY OIL AND PEAT – Vol. I - Coal Gasification - Xingzhong Sha ©Encyclopedia of Life Support Systems (EOLSS) The production of each of these gases is shown in Figure 1. Coal is first crushed and sometimes dried, then fed into gasifier, in which coal reacts with steam and either air or oxygen.
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Short contact time coal liquefaction - Techniques and ...
Initial results are reported on investigations of coal liquefaction by the solvent refined coal process. A description is given of the design and operation of a short contact time reactor in which reaction times as short as 15 seconds can be achieved. The details of several runs and early key findings are given. Coal dissolution is very fast and requires very little hydrogen consumption.
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