In this work, the effect of an ironbased catalyst from coal liquefaction on coal gasification was studied. Two catalyst loading methods and three catalyst loading contents were taken into consideration. Besides, the carbon structure, surface morphology, and element distribution of coal char and gasified semichar were investigated, and the interactions between the catalyst and internal ...
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The effective utilization of the coal liquefaction residue (CLR), which contains about 80% organic matter, is of great significancefor improving the oil yield of the direct liquefaction...
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However, similar to other coal liquefaction processes, the DCL process has not been widely commercialized mainly because of economic uncertainty, high CO 2 emission, and high capital cost [1,2].
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Introduction Commercial Development Historical Background 2. Indirect Coal Liquefaction Preparation of Synthesis Gas Coal Gas... Skip to Article Content; Skip to Article Information ... View the article/chapter PDF and any associated supplements and figures for a period of 48 hours. ... HCoal Process. Catalytic Two ...
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Coal gasification can be an enabler for the polygeneration concept Direct coal liquefaction is highly coal specific and very costly due to severe process conditions Due to its advantages, particularly the suitability for low grade and low rank coal, the ®FBDBTM gasification technology will continue to play a
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A coal liquefaction pilot plant of the NEDOL process, supported by the New Energy and Industrial Technology Development Organization (NEDO), was in successful operation for a total of 269 days at ...
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... The organic phase is made up of macerals, viz., vitrinite (derived from lignin and contain high volatile constituents), exinite (derived from algae, resin and spore, and volatile) and...
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Influence of coal properties on coal conversion processal carbonization, carbon fiber . 123 Table 5 Coal parameters with significant influence on liquefaction process
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Direct Coal Liquefaction (DCL) commonly refers to catalytic hydrogenation of coal in a recycled oil solvent at high pressures with a catalyst. While a range of process configurations have been proposed, the most common version involves at least two high pressure slurry reactors in a series using a dispersed ironbased catalyst and hydrogen ...
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At the beginning of the 20th century the direct liquefaction process was first done by reacting coal with hydrogen and process solvent at high temperatures and pressure to produce liquid fuels. This direct liquefaction process was used to produce high octane aviation gasoline by Germany during World War II. The Fischer Tropsch technology
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water, boiler feed water, and cooling water. Process water is used in the liquefaction process and often plays a part in chemical reactions. Boiler feed water is used to produce steam, and much of it is recovered and returned to the boiler. Cooling is typically done using circulating water. Cooling water loss is often the most significant factor.
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The project is based on Exxon's donor solvent coal liquefaction process. The program will involve both smallscale RD work, and the design, construction and operation of a pilot plant with a capacity of 250 tons per day. The pilot plant will be built adjacent to an Exxon refinery at Baytown, Texas. The new agreement runs through December 31, 1982.
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Much of the research and process development on coal liquefaction after the 1990s was aimed at matching the fuels synthesis conditions with modern, efficient coal gasifiers such as those developed by Uhde, Texaco (now GE), Shell, and CBI. ... (1999) (PDF). Technology status report 010: coal liquefaction. Department of Trade and Industry. http ...
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liquefaction in the early 1900s. In 1925, Franz Fischer and Hans Tropsch used an indirect liquefaction process, which still bears their name, to produce excellent transportation fuels. Germany had 25 liquefaction plants that, at their peak in 1944, produced more than 124,000 barrels daily and met 90 percent of the nation's needs.
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The direct coal liquefaction process usually produces a coal liquefaction residue (CLR) of about 30% of its coal feed (Xu et al., 2014), and there is more than 80% organic matter in the CLR ...
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These results show that the solvent/coal ratio of the feed slurry in the brown coal liquefaction process should be small when the slurry can be transported by a pump for the liquefaction because ...
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Library. Direct Liquefaction Processes. Reason for Discussion of Direct Liquefaction of Coal in Gasifipedia. As the following discussion of Direct Coal Liquefaction (DCL) explains, the fundamental process approach of DCL does not involve gasification at all. Therefore it would seem to be entirely out of scope of Gasifipedia.
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The purpose of coal conversion is the production of alternative fuels, including motor fuels, or the generation of a range of chemicals from coal by process routes, such as gasification, direct and indirect liquefaction, hydropyrolysis, and plasmapyrolysis. The application of these techniques is essential if the large reserves of coal are to be ...
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Coal liquefaction residue is the solid waste from the liquefaction system and accounts for about 2530% of the feed. 4 Thermal conversion through gasification is a better way to deal with this residue, which is of great significance in economical efficiency. 5 It should be noted that ironbased catalysts are widely used in coal liquefaction, as ...
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The beginning of the history of synthetic fuels dates to 1913 when the first process of direct coal liquefaction (DLC) by mean of hydrogenation was patented in Germany by the chemist Friedrich ...
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Actually in a direct coal liquefaction process, the amounts of coal for hydrogen production and steam generation are about 31% and 10%, respectively and the main environment pollutants are generated from the combustion of fuel coal for power and steam generation. ... View PDF View article View in Scopus Google Scholar [6] Sun, ...
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Direct Coal Liquefaction Process Makeup Hydrogen Coal + Catalyst Recycle H 2 Gas Recovery Treatment Coal Liquefaction HDonor Slurry Slurry Hydro treating Fractionation DeAshed Solvent Deashing Oil (DAO) Refining H 2S, NH 3, CO x C C 2 LPG Gasoline Diesel Fuel Heavy Vacuum Gas Oil (HVGO) Ash Reject Direct Coal Liquefaction Plants
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The second way to utilize solvents for coal processing is the liquefaction process. A large variety of studies in the literature have investigated the liquefaction processes of diverse types of ...
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