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sulfur removal from coal with supercritical fluid treatment

Ethanol - wikizero

Etymology Ethanol is the systematic name defined by the International Union of Pure and Applied Chemistry (IUPAC) for a compound consisting of an alkyl group with two carbon atoms

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Upgrading of Heavy Crude Oil in Supercritical Aqueous Fluid in The ...

supercritical aqueous fluid, which makes it possible to significantly reduce the content of sulfur and resinous asphaltene compounds in products, and to increase the yield of light fuel fractions. The possibility of reducing the temperature of upgrading of heavy crude oil due to the presence of active charcoal in the reaction medium is shown.

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Supercritical Water Treatment of Refractory Gold Ores

Supercritical water alters the structure of common sulfide minerals by partially removing sulfur from the mineral structure. This discovery has been applied to the treatment of pyritic gold ores to improve precious metal recovery without generating or utilizing environmentally sensitive products such as SO2, chlorine, or cyanide.

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OUARTERLY PROGRESS REP 0 RT FOR COAL PROCESSING - UNT Digital Library

The goal of this work is to design benign solventlcosolvent systems for reactions which will achieve optimum desulfurization andor denitrogenation in the pre-treatment of coal or coal liquids. Supercritical fluids present excellent opportunities for the pre-treatment of coal, hence we shall utilize supercritical fluids as a reaction medium.

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Supercritical Water Desulfurization of Organic Sulfides Is Consistent ...

Sulfur Abstract Supercritical water desulfurization (SCWDS) has potential as a technique for removing sulfur from feedstocks such as heavy oil and bitumen. However, a fundamental understanding of SCWDS (such as the underlying chemical mechanisms, relative rates of desulfurization, and the role of SCW and hydrocarbons) is limited.

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Critical and supercritical cleaning of hydrocarbon-containing materials ...

Extraction of organic sulfur from coal by use of supercritical fluids: 1992-01-14: Lee et al. 44/624: 4824570: Apparatus for the extraction of constituents by a supercritical fluid or pressurized liquid: 1989-04-25: Bethuel et al. 210/511: 4434028: Apparatus for removing organic contaminants from inorganic-rich mineral solids: 1984-02-28: Eppig ...

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Green Energy Database Update

. Green Energy Database Research. Home Upload Filetbl View Filetbl Update Category1tbl Update Category2tbl Update Category3tbl Update TreeView Update Gallery Link

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Extraction of Low Rank Coal with Sub- and Supercritical Water

And the sulfur removal in liquid effluents is much greater than that in gas effluents. Higher water density causes higher conversion due to promotion of hydrolysis in coal extraction. ... Sulfur Removal from Coal with Supercritical Fluid Treatment PARK J. H. Korean J. Chem. Eng. 24, 314-318, 2007 ... Liquefaction of Coal Using Supercritical ...

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Utility systems - processdesign - Northwestern University

This results in removal of 90-98% of SO 2 and and acid gases (Clean Coal Technologies). Dry Scrubbers. Dry scrubber blow powdered adsorbents into a vessel with gases and then after it has captured the SO 2 and acid gases it is separated from gas using a fabric filter. These systems remove 90-93% of the contaminants (Clean Coal Technologies ...

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Supercritical Water Oxidation for Environmentally Friendly Treatment of ...

Abstract. Supercritical water oxidation is a promising, environment-friendly technology to efficiently deal with a wide variety of organic wastes such as wastewaters, industrial and municipal sludge, etc. As for the two key problems, i.e., corrosion and salt plugging, generally encountered in supercritical water oxidation plants, this chapter ...

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Clean Coal Technologies For Power Generation | PDF - Scribd

P. Jayarama Reddy Clean Coal Technologies for Power Generation Clean Coal Technologies for Power Generation This page intentionally left blank This page intentionally left blank Clean Coal Technologies for Power Generation P. Jayarama Reddy Independent Energy Consultant, Hyderabad, India Cover illustration: Avedre Power Station, Denmark. CRC Press/Balkema is an imprint of theTaylor & Francis ...

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water_requirements by Administrador ENERGYRAD -

An added benefit of cooling the flue gas to remove water is the potential to remove vapor phase sulfur trioxide/sulfuric acid, and to utilize the rejected sensible and latent heat in the boiler or ...

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Quarterly Progress Report Supercritical Fluid Reactions for Coal Processing

Supercritical fluids present excellent opportunities for the pre-treatment of coal, hence we shall utilize supercritical fluids as a reaction medium. A SCF exists in a single phase just above the critical temperature at elevated pressures.

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ADVANCED COAL-FIRED POWER CYCLES - University of Minnesota

The Allam Cycle is any supercritical CO₂Brayton cycle that: - Is oxy-fueled and direct-fired. - Recuperates turbine exhaust. - Uses a heat source in addition to the turbine exhaust. - Utilizes turbine temp >800°C (1000°‒1200°C optimal) - Inlet >80 bar (200‒400 bar optimal). THE ALLAM CYCLE IS BEING ACTIVELY COMMERCIALIZED, Coal-Fired Development,

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United States Patent Application: 0080155899

1) A method for pretreating feedstock for gasification comprising: combining a coal based feedstock stream and supercritical carbon dioxide stream within a pretreatment system to provide a treated feedstock stream; passing at least a portion of the treated feedstock stream to a gasifier to produce a synthesis gas stream comprising less than 50% by volume carbon dioxide, at least 5% by volume ...

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Guide to Supercritical Fluid Extraction Methods in 2022

Supercritical fluid extraction methods CO2 extraction process The raw materials are loaded into the extractor after a series of pretreatments such as impurity removal, crushing, or rolling. The system is filled with a supercritical fluid and pressurized. Under the action of SCF, the soluble components enter the SCF phase.

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Coal Power Impacts, Technology, and Policy: Connecting the Dots

The demand for electricity—closely linked to human, social, and economic development—is expected to rise significantly in the coming decades, especially in developing countries. Coal power currently is, and is expected to remain, an important part of the global electric power mix with much of the future growth again in developing countries. At the same time, coal-based power generation ...

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Desulfurization of Morupule Coal with Subcritical Aqueous Ethanol ...

Supercritical fluids have, also been used for coal desulfurization and early work reported, the removal of both inorganic and organic sulfur compounds, from coal at temperatures above 350°C.[21-23] A systematic method for desulfurization through extraction, with a mixture of ethanol and water in varying proportions at,

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Effects of Hydrothermal Modification on Sulfur Release of Low-Quality ...

In this paper, the effects of hydrothermal modification on sulfur-containing pollutants, such as sulfur dioxide (SO2) and carbonyl sulfide (COS), during coal pyrolysis and combustion, have been investigated. Three typical Chinese low-quality coals, Zhundong, Yimin, and Zhaotong coal (ZT), have been treated by hydrothermal modification at final modification temperatures of 200 °C, 250 °C, and ...

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10.1016/j.fuel.2009.05.020 | DeepDyve

Petroleum vacuum residue consists mainly of hydrocarbons with boiling points above 524 °C, and contains much higher portions of asphaltene and resinous components as well as much higher concentrations of heterocyclic species (sulfur and nitrogen) and metals (vanadium and nickel), compared with the conventional crude oils.

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Soil Remediation by Agglomeration with Petroleum Coke

The agglomerated fine coke and contaminant oil will be floated and removed leaving an oil-free soil. Our studies to date using fine coal have shown this method capable of treating soils saturated with heavy hydrocarbons (crude oil) with oil recoveries as high as 99.9%. The coal and oil were recovered as a high grade fuel.

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Supercritical Carbon Dioxide Circulated EGS Combined with IGCC in New ...

•Sulfur impregnated activated carbon •90-95% removal efficiency, Mercury Removal, •Two-stage Selexol process •99.7% H, 2, S removal capacity •90.3% CO, 2removal at 99.5% purity, Acid Gas Removal, •95% sulfur removal from H, 2, S stream •Tailgas (H, 2,, CO, 2, ) sent back to AGR, Claus Process Plant, Main Components of Gas Cleanup, 18,

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US20030125225A1 - Supercritical fluid cleaning of ... - Google

Chemical formulations and methods for removing unwanted material, such as unexposed photoresist, metal oxides, CMP residue, and the like, from semiconductor wafers or other substrates. The formulations utilize a supercritical fluid-based cleaning composition, which may further include (I) co-solvent(s), (II) surfactant(s), (III) chelating agent(s), and/or (IV) chemical reactant(s).

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CF Technologies, Inc. | SBIR.gov

Supercritical Fluid Extraction of High Value Materials from Coal using CO2. ... Targeted Removal of Sulfur from Brown Grease Feedstocks. ... Coversion of waste water treatment plant fats oils and greases "brown grease" into bio diesel using supercitical fluids and robust catalyst processes./ Same as LOI on headers

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Sci-Hub - hkvisa

Sci-Hub. A research paper is a special publication written by scientists to be read by other researchers. Papers are primary sources neccessary for research - for example, they contain detailed description of new results and experiments. At this time the widest possible distribution of research papers, as well as of other scientific or ...

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National Emission Standards for Hazardous Air Pollutants From Coal- and ...

For example, coal cleaning tends to remove at least some of all the trace metals. EPA also concluded that PM controls tend to effectively remove the trace metals (excluding Hg). The Utility Study also found that flue gas desulfurization (FGD) units were less effective at removing trace metals and exhibited more variability in removal of those ...

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ecoinvent

market for SOx retained, in hard coal flue gas desulfurisation market for sewage sludge, dried market for spent anion exchange resin from potable water production

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Marine/Maritime Bio and Renewable/Sustainable Fuel (SMF) - Page 8 ...

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McDermott - NET Power Delivers Electricity to Grid in Major ...

NET Power's technology combusts natural gas with oxygen, instead of air, and uses supercritical carbon dioxide as a working fluid to drive a turbine instead of steam. NET Power does not produce any nitrogen oxides (NO X ), sulfur oxides (SO X ) or particulate pollution, and the remaining CO 2 is pipeline-quality to either be safely stored in ...

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Sulfur Transformation Characteristics and Mechanisms during

Meng et al. studied sulfur transformation in coal during SCW process at temperature 350 to 550 °C and affirmed H2S was the main gaseous sulfur product.20 However, the temperature was relatively lower than 700 °C for coal complete gasification,21 and the sulfur transformation characteristics above 550 °C were not explored.

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Chapter 14 Boilers - Pearson

Continuous blowdown is the constant removal of a small quantity of boiler water from the steam drum to remove suspended solids and salts that could concentrate in the steam drum. Intermittent (or bottoms) blowdown is the occasional opening of a valve on the bottom of the mud drum to remove solids that have settled. Economizer

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US Patent for Cellulose ester compositions derived from recycled ...

A process for preparing a recycle cellulose ester and a recycle cellulose ester composition and articles made with such recycle cellulose esters comprising at least one cellulose ester having at least one substituent on an anhydroglucose unit (AU) derived from recycled plastic content syngas are provided. The recycled plastic content syngas can be obtained by gasifying feedstocks containing a ...

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ecoinvent - ecoinvent

market for SOx retained, in hard coal flue gas desulfurisation market for sewage sludge, dried market for spent anion exchange resin from potable water production

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Graphene-like MoS2 containing adsorbents for Hg0 capture at coal-fired ...

Abstract. This research focuses on the development of a novel graphene-like MoS2 containing adsorbent for the control of mercury emissions at coal-fired power stations in order to meet the ever-tightening environmental regulations. It was found that the adsorbent loaded with 5wt% Mo demonstrated the best performance in Hg0 capture at low ...

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Total Acid Number Reduction of Naphthenic Acids Using Supercritical ...

TAN removal from NAs using SCF follows first order kinetics on TAN removal. ILs can reduce acidity of heavy oil either forming zwitterionic species or building cage structure around NAs through specific chemical bonds. Thus, non-catalytic SCF- and ILs-based TAN reduction process can open a new window to reduce acidity of heavy oils. Keywords,

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Supercritical fluid extraction of coal: Technical progress report ...

(2) The softening and reactivity of coal at temperatures of about 700/sup 0/F and above. Indeed, the liquefaction of coal by direct reaction with hydrogen and a solvent is carried out in the temperature range of 700 to 850/sup 0/F. All three forms of sulfur (sulfatic, pyritic and organic) are found to be removed by steam.

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Hydrogen from biomass - JSTOR

biomass and coal catalytic gasification for the production of hydrogen and methane10,11. A brief experimental effort is described to demonstrate that the pilot-scale research on hydrogen-production by catalytic coal gasification can be extended to wood. The results show that the coal tech nology is fully transferable to wood, subject to minor

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Carbon dioxide - Wikipedia

Carbon dioxide was the first gas to be described as a discrete substance. In about 1640, the Flemish chemist Jan Baptist van Helmont observed that when he burned charcoal in a closed vessel, the mass of the resulting ash was much less than that of the original charcoal. His interpretation was that the rest of the charcoal had been transmuted into an invisible substance he termed a "gas" or ...

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660 mw supercritical boiler - SlideShare

24. 39 OXYGENATED TREATMENT OF FEED WATER Dosing of oxygen (O2) or Hydrogen peroxide (H2O2) in to feed water system. Concentration in the range of 50 to 300 µg/L. Formation of a thin, tightly adherent ferric oxide (FeOOH) hydrate layer. This layer is much more dense and tight than that of Magnetite layer.

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Granular and powdered activated carbon. Medical search. Frequent questions

Chemicals and Drugs 66. Carbon Carbon Dioxide Carbon Monoxide Nanotubes, Carbon Carbon Isotopes Carbon Tetrachloride Carbon Disulfide Carbon Radioisotopes Nitrogen Soot Carboxyhemoglobin Soil Culture Media Acetates Graphite Carbon Compounds, Inorganic Glucose Oxygen Methane Heme Oxygenase (Decyclizing) Alkanes Bacterial Proteins Carbonates Aldehyde Oxidoreductases Fatty Acids Glycerol Organic ...

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