advantages direct coal liquefaction

advantages direct coal liquefaction

US7763167B2 - Process for direct coal liquefaction - Google

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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Coal liquefaction - OilfieldWiki

Shenhua, a Chinese coal mining company, decided in 2002 to build a direct liquefaction plant in Inner Mongolia, with barrel capacity of 20 thousand barrels per day (3.2 × 10 ^ 3 m 3 /d). First tests were implemented at the end of 2008. A second and longer test campaign was started in October 2009.

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10.5. Indirect Liquefaction Processes | netl.doe.gov

Direct coal liquefaction requires an external source of hydrogen, which may have to be provided by gasifying additional coal feed and/or the heavy residue produced from the DCL reactor. Many argue that indirect liquefaction with the current state-of-the-art technologies is more competitive than direct liquefaction.

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Process utilizes coal-derived alkylphenols | C&EN Global

The advent of coal liquefaction processes, particularly of the direct variety, has spawned a number of processes to increase yields of desired products from the main process. One such process, called Dynaphen, was described recently at the 1981 annual meeting of the American Institute of Chemical Engineers in New Orleans by Derk T. A. Huibers, manager of new process development for Hydrocarbon ...

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Recent advances in direct coal liquefaction

The growing demand for petroleum, accompanied by the declining petroleum reserves and the concerns over energy security, has intensified the interest in direct coal liquefaction (DCL), particularly in countries such as China which is rich in coal resources, but short of petroleum.

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Kinetic Modeling of Direct Liquefaction of Coal - ERA

Direct coal liquefaction converts solid coal to liquid fuels at high temperature and pressures in the presence or absence of catalyst. One of the advantages of direct liquefaction is that, this process can convert coal to liquid without the need for producing syngas (H2 and CO) as in indirect process and also has higher efficiency than indirect ...

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14 Advantages and Disadvantages of Coal – Vittana.org

Dec 16, 2019 · On the other hand, burning coal can also have significant consequences to local and global environments. Is coal a power resource that we should still be using as a primary source of energy? The answer lies in the advantages and disadvantages of coal for our modern world. Here Are the Advantages of Coal. 1. It is available in an abundant supply.

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Advanced direct coal liquefaction concepts (Technical

@article{osti_6491610, title = {Advanced direct coal liquefaction concepts}, author = {Berger, D. J. and Parker, R. J. and Simpson, P. L.}, abstractNote = {During the first quarter of FY 1993, the Project proceeded close to the Project Plan. The analysis of the feed material has been completed as far as possible. Some unplanned distillation was needed to correct the boiling range of the Black ...

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Effect of Direct Coal Liquefaction Conditions on Coal

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 Bienfait lignite in the temperature range of 350–450 °C, 4 MPa H2, solvent/coal ratio of 2:1, and ...

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US20120080358A1 - Pipeline Crude Oil in Coal Liquefaction

The present disclosure provides methods and systems for coal liquefaction using a pipeline crude oil. A method of obtaining a de-ashed coal extract includes exposing a coal to a pipeline crude oil to form a slurry, elevating the temperature of the slurry to facilitate liquefying the coal and liberating a volatile matter, and separating the insoluble components from the slurry to obtain a de ...

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Recent Advances in Direct Coal Liquefaction

The growing demand for petroleum, accompanied by the declining petroleum reserves and the concerns over energy security, has intensified the interest in direct coal liquefaction (DCL), particularly in countries such as China which is rich in coal resources, but short of petroleum. In addition to a general introduction on the mechanisms and processes of DCL, this paper overviews some recent ...

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Japan’s Coal Liquefaction Technology / Products / Japanest NIPPON

The coal liquefaction technology we introduce here is just that kind of new technology, one that provides an answer to very contemporary needs. In fact, Japan was not first on the uptake of research and development in this field, but in the short time it has been engaged in coal liquefaction and has produced outstanding results, and today ...

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Indirect Coal Liquefaction Processes - EPA

----- -5- Table 1 Product and Capital Costs of Selected Coal Liquefaction Processes(1981 Dollars) Texaco (Bituminous)[2,3] Koppers (Bitum.)[l] Advanced Technology (Bi tuminous)[1,4] Lurgi (Subbit.)[7] Modified Winkler (Lignite)[8] Texaco (Lignite) Lurgi Mobil MTG (Subbit.)[7] Mobil MTG Incremental Cost Fischer Tropsch[7] Product Cost ($/mBtu) Product Mix 100% MeOH* 100% MeOH* 100% MeOH* 47.9% ...

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Novel Use of Residue from Direct Coal Liquefaction Process

Abstract. Direct coal liquefaction residue (DCLR) is, commonly, designed to be used as a feed stock for gasification or combustion. Use of DCLR as a value added product is very important for improving overall economy of direct coal liquefaction processes. This study shows that the DCLR may be used as a pavement asphalt modifier.

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The Coal Liquefaction Plants: Economic Implications and

The Coal Liquefaction Plants: Economic Implications and Impact on the South Africa's Ability to Withstand an Oil Cut-Off Alternative title Notes and Documents - United Nations Centre Against ApartheidNo. 10/85 Author/Creator United Nations Centre against Apartheid; Conlon, Paul Publisher United Nations, New York Date 1985-10-00 Resource ...

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Kinetic Modeling of Direct Liquefaction of... | ERA

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Coal to Liquids (CTL): An Overview

Coal to Liquids Technologies Conversion Technologies: Direct Liquefaction (Bergius Hydrocracking) Indirect (Gasification + Fischer-Tropsch) Liquefaction. Direct Liquefaction - Dormant in the U.S. but being actively pursued in China. The Shenhua project in Inner Mongolia will bring a full scale single train, 20,000 BPD commercial unit

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Coal liquefaction - Liquid Wiki

Dec 24, 2017 · Friedrich Bergius, also a German chemist, invented direct coal liquefaction (DCL) as a way to convert lignite into synthetic oil in 1913. Coal liquefaction became an integral part of the German industry helped to fuel the its military during World War II. Coal liquefaction was an important part of Adolf Hitlers four-year plan of 1936.

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SHORT CONTACT TIME DIRECT COAL LIQUEFACTION USING A NOVEL

scale batch reactor (SCTBR) for coal liquefaction at short contact times (0.01 to 10 minutes or longer). Additional objectives are to study the kinetics of direct coal liquefaction particularly at short reaction times, and to investigate the role of the organic oxygen

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Assessment of slurry pressure letdown valve and slurry

lopment of direct liquefaction technology for converting coal into clean liquids. In processing coal in this mode, the refined product is pro- duced at high pressure and high temperature and later separated into vapor and slurry components by letdown to a low pressure of only a few atmospheres.

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Coal Liquefaction - Dadyburjor - - Major Reference Works

Oct 14, 2011 · Liquefaction can be direct, from the coal itself, or indirect, from synthesis gas (CO and H2) obtained by gasification of the coal. Coal liquefaction incorporates both an increase in the H/C ratio an...

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Coal and Liquid Fuels - Stanford University

direct liquefaction plants at end of WWII •Produced 4 MMT/yr fuels •Met 90% of nation’s needs South Africa •Developed coal liquids industry from 1950s through the mid-1980s •Three coal-to-liquids facilities •Produced 10 MMT/yr fuels at peak •Met 60% of nation’s needs China •Planning a 1 MMT/yr direct liquefaction plant for 2007

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PDF Liquid Fuels from U.S. Coal Graphics FINAL

domestic-based coal-to-liquid fuels in the near future - if we act soon. Producing Liquid Fuels from Coal - Two Approaches Two basic approaches to convert coal to a liquid fuel: • Direct Liquefaction calls for breaking coal down in a solvent at elevated temperature and pressure, followed by interaction with hydrogen gas and a catalyst.

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Catalytic Liquefaction of Coal with Highly Dispersed Fe2S3

The catalysts obtained were used in direct coal liquefaction of a medium volatile bituminous coal (Yerbabuena No 1) from Cundinamarca using a 250 mL Parr reactor at 723 K, and a hydrogen pressure ...

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Coal liquefaction - Infogalactic: the planetary knowledge core

Direct and indirect processes. Specific liquefaction technologies generally fall into two categories: direct (DCL) and indirect liquefaction (ICL) processes.Indirect liquefaction processes generally involve gasification of coal to a mixture of carbon monoxide and hydrogen and then using a process such as Fischer–Tropsch process to convert the syngas mixture into liquid hydrocarbons.

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