new materials for coal liquefaction
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new materials for coal liquefaction

New materials for coal liquefaction - NASA/ADS

A description is presented of the general criteria for the selection of materials for coal liquefaction catalysis. In addition to their catalytical effectiveness prospective catalysts must be able to meet certain criteria regarding their thermal and chemical stability. By comparing free energies of formation, it is possible to make a qualitative evaluation of the relative stability of various ...

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New catalytic materials for the liquefaction of coal ...

Potential second-generation catalytic materials for the direct liquefaction of coal to boiler fuel are studied. Both fundamental aspects and engineering constraints were considered in evaluating materials and assigning a priority for further study. A synopsis of relevant background information, the nature of the study, and the evaluation of materials is presented along with a detailed analysis ...

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New catalysts for coal liquefaction and new ...

Sep 01, 1994  @article{osti_10103060, title = {New catalysts for coal liquefaction and new nanocrystalline catalysts synthesis methods}, author = {Linehan, J C and Matson, D W and Darab, J G}, abstractNote = {The use of coal as a source of transportation fuel is currently economically unfavorable due to an abundant world petroleum supply and the relatively high cost of coal liquefaction.

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Coal liquefaction: recent finding in occupational safety ...

Coal liquefaction materials contain potentially hazardous and biologi- call y active substances, many of which have not been characterized as to their composition and/or health effects. Animal studies have shown that certain fractions of coal liquefaction process streams may cause tumors at

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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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Liquefaction of Coal - eolss.net

Coal liquefaction is an industrial process in which coal as raw material, through chemical reactions, is converted into liquid hydrocarbon mixture, which, under further processing, becomes desired liquid fuels or chemical feedstock. Therefore, the main purpose of coal liquefaction lies in production of either synthetic oil as a partial

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Co-Liquefaction of Wastes and Coal Mixtures to Produce ...

The materials used in this study were a brown coal from the CSA mine in Czech Republic and PE wastes. Table 1 shows the proximate and ultimate analysis of the materials used. Table 1: Proximate and ultimate analysis of the feedstocks used in co-liquefaction.

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Corrosion-Resistant materials for coal liquefaction ...

高达10%返现  The corrosion response of alloys in various process environments in coal liquefaction pilot plants is discussed. Causes of corrosion and limiting conditions (such as temperature, pressure, and fluid velocity) are addressed. Solutions and needed development are emphasized.

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Coal Liquefication - an overview ScienceDirect Topics

Coal liquefaction syncrudes derived from a variety of Australian coals (lignite, sub-bituminous, bituminous) and a number of different coal liquefaction processes have been produced at these laboratories. To produce acceptable quality transport fuels from coal liquefaction syncrudes, hydrotreatment of the syncrude is essential.

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Coal liquefaction - Wikipedia

Historical background. Coal liquefaction originally was developed at the beginning of the 20th century. The best-known CTL process is Fischer–Tropsch synthesis (FT), named after the inventors Franz Fischer and Hans Tropsch from the Kaiser Wilhelm Institute in the 1920s. The FT synthesis is the basis for indirect coal liquefaction (ICL) technology.

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Gasification of residual materials from coal liquefaction ...

Robin, A. M. Gasification of residual materials from coal liquefaction. Type I evaluation of H-coal liquefaction residue from Illinois No. 6 coal as a feedstock for the Texaco Gasification Processes. United States: N. p., 1981. Web. doi:10.2172/5752079.

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OVERVIEW OF COAL-TO-LIQUIDS: A HISTORICAL PERSPECTIVE

and jet fuel. Historically, this technology is well-established, mainly by indirect coal liquefaction based on gasifying coal to produce syngas, a feedstock for Fischer-Tropsch (FT) synthesis to make liquid hydrocarbons, which, in turn, can be refined into high-value products such as

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Coal Liquefication - an overview ScienceDirect Topics

Gareth D. Mitchell, in Applied Coal Petrology, 2008 6.2 Process and Methods for Coal Liquefaction. Coal liquefaction technology began in Germany when Frederick Bergius showed that it was possible to add hydrogen to coal at 300–500°C and 1.0 MPa to produce distillate products (Bergius, 1914).

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Coal Liquefaction - Phys.org

Jan 09, 2006  “Methods of coal liquefaction have been available since the beginning of the last century, but the cost has caused us to search for more effective new processes,” explains Matthias W. Haenel.

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Coal Liquefaction - Dadyburjor - - Major Reference Works ...

Oct 14, 2011  Coal liquefaction incorporates both an increase in the H/C ratio and removal of heteroatoms (S, N, O) and inorganic oxides (ash). Successful industrial direct liquefaction processes must incorporate both these steps, along with the transport of solid and slurry - phase material in large – scale processing.

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A NEW CHEMICAL STRUCTURE FOR COAL Industrial ...

May 01, 2002  Superacid coal chemistry. 2. Model compound studies under conditions of HF:BF3:H2 catalysed mild coal liquefaction. Fuel 1984, 63 (10) , 1427-1431. DOI: 10.1016/0016-2361(84)90351-X. John H. Shinn. From coal to single-stage and two-stage products: A reactive model of coal structure.

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Overview of Obtaining Alternative Fuels in The ...

Sep 29, 2014  The liquefaction process of coal and biomass materials, which is known as “Co-liquefaction”, has not been developed in Malaysia. The yields and quality (especially H/C ratio) of the liquid products obtained from coal under less severe liquefaction conditions (at lower temperature and pressure) can be improved with co-liquefaction of coal ...

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US8449632B2 - Sewage material in coal liquefaction ...

US8449632B2 US13/166,174 US201113166174A US8449632B2 US 8449632 B2 US8449632 B2 US 8449632B2 US 201113166174 A US201113166174 A US

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Direct Coal Liquefaction

• Direct liquefaction efficiency may be higher than indirect technology. One ton of a high volatile bituminous coal can be converted into approximately three barrels of high quality distillate syncrude for refinery upgrading and blending • Direct Liquefaction provides high octane, low sulfur gasoline and a

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Materials problems in coal gasification and liquefaction ...

The conversion of coal to “clean” fuels imposes severe demands on materials of construc-tion. The operational environments experienced by these materials may be high tempera-tures and high pressures and contain substantial quantities of H2S, H2, organic acids, chlorides and particulate matter. Experiences to date indicate that corrosion and erosion problems will tax materials engineers and ...

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Exxon Donor Solvent Coal Liquefaction Process

Relative to the Base Case, product cost reductions for Cases 1-3 were roughly estimated as follows: Case % Cost Reduction[7] 1 20 2 22 3 28 B. Wyoming Coal Case To determine the effect of coal type on the EDS liquefaction process, ERE performed a study design for sub-bituminous Wyodak coal.[12][14][15] This design was patterned after the 1975 ...

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10.6. Direct Liquefaction Processes netl.doe.gov

The U.S. Department of Energy (DOE) had a very active coal liquefaction research program in 1970 into the 1980s in response to the Organization of the Petroleum Exporting Countries (OPEC) oil embargo of 1973, but the funding has been greatly reduced since the 1990s when the DOE development for direct coal liquefaction ended.

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CiteSeerX — tal:M MATERIALS FOR COAL LIQUEFACTION

@MISC{Levy_tal:mmaterials, author = {Ricardo B. Levy and James A. Cusumano}, title = {tal:M MATERIALS FOR COAL LIQUEFACTION}, year = {}} Share. OpenURL . Abstract. l iquefac t ion i s one of the a1 te rna t ives cur ren t ly under developiment f o r I n the more advanced l iquefac t ion the production of clean burning f u e l s from coal ...

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Gasification of residual materials from coal liquefaction ...

COVID-19 Resources. Reliable information about the coronavirus (COVID-19) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this WorldCat.org search.OCLC’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus ...

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Coal Liquefaction - gao.gov

Coal liquefaction is the conversion of coal to a clean-burning, low-sulfer-content fuel which can augment gasoline and boiler fuels. Direct liquefaction processes are currently in the research and development stage and are expected to yield a high percentage of boiler fuels for industry and utilities.

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Exxon Donor Solvent Coal Liquefaction Process

Relative to the Base Case, product cost reductions for Cases 1-3 were roughly estimated as follows: Case % Cost Reduction[7] 1 20 2 22 3 28 B. Wyoming Coal Case To determine the effect of coal type on the EDS liquefaction process, ERE performed a study design for sub-bituminous Wyodak coal.[12][14][15] This design was patterned after the 1975 ...

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Environmental Assessment of Coal Liquefaction: Annual Report

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. ... • Separation. The material from the liquefaction operation consists of gas, raw coal liquids, and a heavy stream containing unreacted coal and mineral matter. The pressure on this material is ...

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A NEW CHEMICAL STRUCTURE FOR COAL Industrial ...

May 01, 2002  Superacid coal chemistry. 2. Model compound studies under conditions of HF:BF3:H2 catalysed mild coal liquefaction. Fuel 1984, 63 (10) , 1427-1431. DOI: 10.1016/0016-2361(84)90351-X. John H. Shinn. From coal to single-stage and two-stage products: A reactive model of coal structure.

Read More
Direct Coal Liquefaction

• Direct liquefaction efficiency may be higher than indirect technology. One ton of a high volatile bituminous coal can be converted into approximately three barrels of high quality distillate syncrude for refinery upgrading and blending • Direct Liquefaction provides high octane, low sulfur gasoline and a

Read More
Catalysis in coal liquefaction:new directions for research ...

New and improved catalysts can lead to more favourable process economics by increasing the rates of reaction and product selectivity and by lowering reaction temperatures and pressures. Coal liquefaction catalysis has been reviewed with the aims of assessing the present state of knowledge and identifying new directions and strategies for research.

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Catalysis and Catalyst Dispersion in Coal Liquefaction ...

Mar 01, 1994  Synthesis of pitch materials from hydrogenation of anthracite. Fuel Processing Technology 2004, 85 ... A new process for catalytic liquefaction of coal using dispersed MoS 2 catalyst generated in situ with added H 2 O. Fuel 2000, 79 ... Direct liquefaction of coal

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Materials problems in coal gasification and liquefaction ...

The conversion of coal to “clean” fuels imposes severe demands on materials of construc-tion. The operational environments experienced by these materials may be high tempera-tures and high pressures and contain substantial quantities of H2S, H2, organic acids, chlorides and particulate matter. Experiences to date indicate that corrosion and erosion problems will tax materials engineers and ...

Read More
US7763167B2 - Process for direct coal liquefaction ...

Process for direct coal liquefaction of coal, including: (1) preparing a coal slurry from raw coal; (2) preheating the coal slurry, then feeding it into reaction system to undergo liquefaction reaction; (3) separating reaction products in a separator to form a liquid phase and a gas phase, wherein the liquid phase is fractionated in an atmospheric tower into a light oil fraction and a bottom ...

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New IMSBC Code requirements aim to control liquefaction o ...

The International Maritime Solid Bulk Cargoes (IMSBC) Code describes coal as a natural, solid, combustible material consisting of amorphous carbon and hydrocarbons.Although coal is best known for its flammable and self-heating properties, certain coal cargoes may also be liable to liquefaction.

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Coal Liquefaction - Dadyburjor - - Major Reference Works ...

Oct 14, 2011  Coal liquefaction incorporates both an increase in the H/C ratio and removal of heteroatoms (S, N, O) and inorganic oxides (ash). Successful industrial direct liquefaction processes must incorporate both these steps, along with the transport of solid and slurry - phase material in large – scale processing.

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What is coal liquefaction? - Quora

Apr 20, 2021  Coal liquefaction denotes the process of converting solid coal to a liquid fuel. The primary objective of any coal liquefaction process is to increase the hydrogen-to-carbon molar ratio. For a typical bituminous coal, this ratio is about 0.8, whil...

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A Unique Experience with Liquefaction Assessment of ...

earthquake induced liquefaction is a concern for mining lease holders, mining regulators and the community. Ash tailings dams are typically raised by excavating and compacting reclaimed ash to form new embankments over slurry deposited ash, relying on

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(PDF) Stability of adamantane to donor liquefaction ...

Material balances indicated that nearly 96% sical model’ and the polyamantane structure6 have different of the adamantane was recovered. implications for the type of chemistry required for more In another experiment, an Illinois No. 6 coal-adaman- selective, controlled and sophisticated conversion of coal.

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