Coal can be readily transformed into liquid hydrocarbons via FT synthesis. In this process, coal is gasified to syngas, but this sort of syngas is H 2 deficient as it contains a low H 2 /CO ratio () [16,17], which is unqualified for the demand of FT
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Although there are a number of different demonstrated process routes for production of liquid fuels from solid feedstocks like coal ( direct coal liquefaction), the most important methods have based on production of syngas from gasification of coal, which is converted to liquid hydrocarbons or alcohol for use as fuel or fuel refining feedstock.
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The FischerTropsch process produces a broad spectrum of straight chain paraffinic hydrocarbons that require upgrading to produce diesel fuel, lube feedstock and paraffinic naphtha for petrochemical applications. In contrast, MTG selectively converts methanol to one simple product: a very low sulfur, low benzene high quality gasoline.
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Depending on the gasification technology employed, significant quantities of water (H 2 O), CO 2, and methane (CH 4) can be present in the synthesis gas as well as several minor and trace components (Higman and van der Burgt, 2003).Under the substoichiometricreducing conditions of the gasifier, most of the fuel's sulfur converts to hydrogen sulfide (H 2 S), but some (310%) also converts to ...
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For more than half a century, FischerTropsch synthesis (FTS) of liquid hydrocarbons was a technology of great potential for the indirect liquefaction of solid or gaseous carbonbased energy ...
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Publication date: January 01, 1993. Coal, "the black rock that burns," is the subject of song, story, and legend. The earliest literature citation of coal (combustible bodies, some of which by inference must be coal) is credited to Aristotle in his treatise "Meteorology," which may date near the middle of the fourth century ...
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4: CoaltoLiquids (CTL) Like GTL, coaltoliquids (CTL) fuels are produced by isolating the hydrocarbons in existing fossil fuels and converting them to a form of synthetic fuel that can be used in existing vehicles' engines. Manufacturers use two methods to make that conversion.
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Coal rank through vitrinite reflectance can be used to determine the potential of a coal seam for producing hydrocarbons. ... The liquid yield and the nature of solid residue from coals of constant coal rank condition is ... Kaneko T, Tsuruya S (2004) Hypercoal process to produce the ashfree coal. Fuel Process Technol 85:947967. ...
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The most important process of this group is the HCoal process, developed by Hydrocarbon Research, Inc. (HRI) as an outgrowth of previous work on the hydrogenation of petroleum fractions. ... Filtration is the solidliquid separation technique of choice in the British Coal Liquid Solvent Extraction (LSE) process. In comparison to other solid ...
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Alternative liquid hydrocarbon fuels can be obtained from various feedstocks, ranging from solids to gases. CoaltoLiquids (CTL) is a technology based on the liquefaction of coal using three basic approaches; pyrolysis, direct coal liquefaction (DCL) and indirect coal liquefaction (ICL) [6]. GastoLiquids (GTL) and Biomassto
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Describe the process to convert coal to liquids hydrocarbons using direct process. Provide appropriate equations, if any, and describe the process conditions, where applicable. Provide ONE (1) advantage and ONE (1) disadvantage of this process over indirect process. [8 marks] b. State and describe briefly ONE (1) process to remove H2O from ...
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Coal, gas, liquid hydrocarbons, hydrogen, wind, solar photovoltaic, and thermal can all be used in the right circumstances and combinations. ... Combustion of these tars is used to provide heat for the torrefaction process. The solid torrefied residue is a semichar not a char because it still contains relatively large quantities of oxygen and ...
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The hydrogenation of bituminous coal produces liquid hydrocarbons which have a number of uses in many processes. ... they normally start combustion on catching fire where as in solid fuels excess air is required for the process of combustion. Pulverised coal does not require excess air for combustion. ... Determination of Calorific Value of ...
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The FischerTropsch CoaltoLiquids Approach Overview of the Process A highly simplified schematic of the FT CTL process is shown in Figure The process begins with the gasification of coal, which consists of reacting coal with steam and oxygen at elevated temperatures (1,000 to 1,500 degrees Celsius) and moderate pres
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Coal liquefaction is a process of converting coal into liquid hydrocarbons: liquid fuels and process is often known as "Coal to X" or "Carbon to X", where X can be many different hydrocarbonbased products. However, the most common process chain is "Coal to Liquid Fuels" (CTL).
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The product contains gases, liquids, and a solid residue of coal minerals and carbon. To make the product usable as transportation fuels, it must first be refined, and the solid residue must be separated [15]. ... pyrolysis is the oldest method of extracting liquid hydrocarbons from the coal at a high temperature (950°C), but the liquid fuel ...
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The abundant oxygen crosslinking structures in POP3 prevented the condensation of aromatic hydrocarbons (below 500 °C) and the occurrence of a distinct liquidphase transition, which resulted in a solidstate carbonization process and the formation of a more amorphous texture of the resulting carbon product.
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The key to the catalytic process is the construction of a highly efficient tandem catalyst PtMo 2 C/C + Ru/C, which can directly convert CO and H 2 O in aqueous phase to liquid hydrocarbons with ...
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The process typically uses the technique of heating under pressure (up to 470°C, 200 bar) and hydrogenation where hydrogen is added to a coalwater slurry. The slurry increases the H/C ratio to a crude oil level and removes impurities such as sulfur, nitrogen, and oxygen.
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The indirect route is composed of 2 steps: First, coal is gasified with steam and oxygen to produce a synthesis gas (syngas), which is then cleaned to rid of dust, tar, and acid gases. The second step reacts the synthesis gas with a catalyst in the FischerTropsch process, which converts the syngas into a range of hydrocarbon fuels such as ...
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Coal Carbonization. In carbonization process, coal is heated, and both gaseous and liquid products are driven off leaving the char or coke as solid residue. Carbonization process is classified as high (temperature > 1650 F), low (T < 1350ºF) and medium (T between 1350 and 1650 F) temperature based on their uses . Hightemperature carbonization ...
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obtained from gasification of coal to hydrocarbon liquids. Because the coal is first gasified before conversion to liquid fuels, the FischerTropsch (FT) process for CTL is known as a type of indirect coal liquefaction (ICL). ICL is a completely different approach from DCL for providing liquid fuels from coal. ICL
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For the most highly developed processes, coal conversion can be as high as 90% on a mineral ash free basis, with a C 5+ distillate yield up to 75% and hydrogen consumption of 57%wt. When an external catalyst is used, it is typically some combination of cobalt, nickel, and molybdenum on a solid acid support such as silicaalumina [].DCL process concepts have been based on a variety of ...
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BtL is produced in a fourstepprocess: 1. Gasification to produce raw syngas: C X H y O z + AOa CO + H 2 + CO 2. Exact reactions are multifold, any sulphur becomes H 2 S and COS. 2. Syngas conditioning to achieve correct gas quality: CO + H 2 O CO 2 + H 2. and removal of CO 2, and any H 2 S and COS.
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Four general methods are used for liquefaction: (1) pyrolysis and hydrocarbonization (coal is heated in the absence of air or in a stream of hydrogen), (2) solvent extraction (coal hydrocarbons are selectively dissolved and hydrogen is added to produce the desired liquids), (3) catalytic liquefaction ( hydrogenation takes place in the presence ...
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This process breaks down the coal into liquid hydrocarbons. Step 3/3 2. Indirect coal liquefaction: This method involves gasifying coal to produce a synthesis gas (syngas) which is then converted into liquid hydrocarbons through a process called FischerTropsch synthesis. So, the answer to the question is coal liquefaction.
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Solid hydrocarbons Cleanly converting coal, petroleum coke and biomass into highvalue products and power. Air Products' gasification process converts coal, petcoke and biomass into highvalue products. Demand for coal is increasing because of the world's growing appetite for energy. However, depletion of the highestquality deposits and ...
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A material supplier from Belgium would like to produce limestone powder for his custome...
India is rich in various mineral resources and it is an important mineral processing market
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