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Monday, July 27, 2020 | History

1 edition of Reactor test project for chemical removal of pyritic sulfur from coal found in the catalog.

Reactor test project for chemical removal of pyritic sulfur from coal

Reactor test project for chemical removal of pyritic sulfur from coal

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Published by The Office, Available to the public through the National Technical Information Service in Washington, D.C, Springfield, Va .
Written in English

    Subjects:
  • Coal -- Desulfurization.,
  • Coal -- Desulfurization -- Pilot plants.

  • Edition Notes

    Statementby R.A. Meyers ... [et al.] ; prepared for U.S. Environmental Protection Agency, Office of Research and Development.
    SeriesInteragency energy/environment R&D program report -- EPA-600/7-79-013 a, EPA-600/7-79-013 b., Research reporting series -- EPA-600/7-79-013 a, EPA-600/7-79-013 b.
    ContributionsMeyers, Robert A. 1936-, United States. Environmental Protection Agency. Office of Research and Development., Industrial Environmental Research Laboratory (Research Triangle Park, N.C.)
    The Physical Object
    Pagination2 v. :
    ID Numbers
    Open LibraryOL17822948M

    Direct coal liquefaction has been studied and practiced since the s. It was used in Germany during World War II to produce synthetic fuels when there was no oil allowed into the country. Since then, it has been studied in the United States and many different technologies have been investigated. Since the US is rich in coal resources, this is one way to be energy by: A stirred reactor combustion system was developed to gather information on the mechanisms of ignition and flame propagation of coal dust under conditions similar to those found in coal dust explosion flames. Experiments have been carried out using pulverized bituminous coal.

      When coal is burned, the sulfur present in coal is converted to sulfur dioxide (SO2), which is responsible for the acid rain phenomenon. S(s) + O2(g) → SO2(g) If kg of S are reacted with oxygen, calculate the volume of SO2 gas (in mL) formed at . than 98% of sulfur in coal that is converted into commercial products. On the other hand, the Wabash River Coal Gasification Repowering Project was the first full-size commercial gasification combined cycle plant built in the U.S., located outside West Terre Haute, IN. The plant started full operations in November The plant isFile Size: KB.

    The chemical reactions of gasification can progress to different extents depending on the gasification conditions (like temperature and pressure) and the feedstock used. Combustion reactions take place in a gasification process, but, in comparison with conventional combustion which uses a stoichiometric excess of oxidant, gasification typically uses one-fifth to one-third of the theoretical. sulfur coals is inadequate and is expected to remain so. By shifting available low-sulfur coal to plants not meeting primary standards from plants which could burn higher sulfur coal and still meet the primary standards, some improvement in ambient air quality could be achieved. It is estimated that a shift of as much as 36 million tons could.


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Reactor test project for chemical removal of pyritic sulfur from coal Download PDF EPUB FB2

EPA/a January Reactor Test Project for Chemical Removal of Pyritic Sulfur from Coal; Volume I. Final Report by R.A. Meyers, M.J. Santy, W.D Hart, L.C. McClanathan, and R.A. Orsini TRW, Defense and Space Systems Group One Space Park Redondo Beach, California Contract No.

Program Element No. EHB EPA Project Officer: Lewis D. Tamny Industrial. Get this from a library. Reactor test project for chemical removal of pyritic sulfur from coal.

[Robert A Meyers; United States. Environmental Protection Agency. Office of Research and Development.; Industrial Environmental Research Laboratory (Research Triangle Park, N.C.);]. SPONSORING AGENCY CODE EPA//13 i6. SUPPLEMENTARY NOTES JERL-RTP project officer is Lewis D.

Tamny, Mail D / ABSTRACT The report gives results of an evaluation of the initial performance of the Reactor Test Unit (RTU) for chemical removal of pyritic sulfur from an Appalachian coal.

Coal structure, chemical desulfurization of coal, and chemistry of desulfurization reactions are discussed. Criteria for successful chemical desulfurization processes are set forth.

Various pyritic sulfur removal processes are discussed. These include use of metal ion oxidants, oxygen in aqueous solution, and caustic leaching. The removal of pyritic sulfur from coal employing thiobacillus ferrooxidans in a packed column reactor.

Authors. David M. Tillet, School of Chemical Engineering, Georgia Institute of Technology, Atlanta, Georgia Microbial desulphurization of coal containing pyritic sulphur in a continuously operated bench scale coal slurry reactor. The removal of pyritic sulphur from a Mexican sub-bituminous coal in different solutions was investigated.

The effects of type and concentration of reagents used and the presence of ozone as. Finely divided coal or solid coal derivatives containing pyrite are reacted with a ferric ion solution; FeCl3 is particularly suitable. The ferric ion is reduced to ferrous ion and free sulfur is formed. The solution is then filtered from the coal which is then washed and heat dried under low pressure.

Most of the free sulfur is volatized from the coal due to the heat drying; additional free Cited by: This test method provides for a separation of coal-associated sulfur into two commonly recognized forms: pyritic and sulfate. Organic sulfur is calculated by difference. Results obtained by the test method are used to serve a number of interests, including the evaluation of coal preparation and processing operations designed to reduce coal.

The removal of pyritic sulfur from a Turkish lignite in aqueous suspension by nitric acid was investigated. The effects of particle size (−60, − and − mesh), reaction time (0–10 s), nitric acid concentration (5–30 wt.%), temperature (25– °C) and speed of stirring (–20 s −1) were pyritic sulfur was quantitatively removed at boiling temperature Cited by: @article{osti_, title = {The use of ethanol to remove sulfur from coal.

Final report, September December ; Revision}, author = {Savage, R L and Lazarov, L K and Prudich, M E and Lange, C A and Kumar, N}, abstractNote = {The initial technical goal in the project was to develop a chemical method for the cost effective removal of both inorganic and organic sulfur from Ohio coals.

Abstract. The chemical structure of coal macerals is usually characterized by the presence of inorganic and organic sulfur. Inorganic sulfur consists mostly of iron sulfides, the so-called “pyritic sulfur,” whereas organic sulfur is covalently bound to the carbon atoms of the coal by: SULFUR REMOVAL FROM COAL BENEFICIATION WASTES.

and the degree of pyritic sulfur removaland % respectively. A dual-screw. Maximum ash, pyritic sulfur and sulfate sulfur rejections was obtained at particle size of − mm and oil dosage of g/t.

Percent of ash, pyritic sulfur and sulfate sulfur in coal could be reduced to minimum values of %, %, %, by: 9. Enhancement of microbial removal of pyritic sulfur from coal using concentrated cell suspension of T. ferrooxidans and an external carbon dioxide supply.

Kargi F(1). Author information: (1)Department of Chemical Engineering and Biotechnology Research Center Cited by: Many of these modern processes belong to an energy generation family called clean coal technologies (CCT).

When coal is burned to produce energy, its chemical makeup is changed and sulfur is released. To avoid environmental problems with the sulfur, coal companies and power plants take measures to remove it before, during and after burning. Abstract. Most coal requires some preparation before use.

Preparation may range from simply crushing to provide a size consist suitable for certain types of boilers to extensive size reduction and cleaning to remove sulfur and ash-forming mineral by: Biological attack of pyrite is a potential method of reducing pyritic sulphur in coal.

Integration of such attacks with microwave pretreatment can enhance the efficiency of the process. Alternatively, processes such as oil-agglomeration can be coupled with the biological attack to obtain higher rates of pyritic sulphur by: 1. Finely divided coal or coal derivatives, containing pyrite, are reacted with sulfurous acid (the oxidizing agent); if desired, HCl may also be used to improve the reaction efficiency to remove pyritic sulfur from coal as shown by the following equations: Primary: Oxidation - reduction 4 FeS 2 (pyrite) +3SO 2 + 12 HCl 4 FeCl 3 + 11S + 6 H 2 O Secondary: Oxidation - reduction 4 FeCl 3 + FeS 2.

It was found that there were some kinds of sulfur-oxidizing bacteria in the acidic mine water, and these bacteria could promote the dissolution behavior of heavy metals in the mining smelting waste slags. In this paper we collected a bacterium sample form a mining-water of an abandoned pyrite mine in the southwest of China and named it as FJ : Shao Jian Zhang, Dong Wei Li, Dou Li, Zhi Rong Liang.

Read "Biological removal of sulphur and ash from fine-grained high pyritic sulphur coals using a mixed culture of mesophilic microorganisms, Fuel" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Magnetic desulfurization is an attractive physical method of coal cleaning which has been studied for a quarter century. High‐frequency selective heating of coal to convert nonmagnetic pyrite to moderately magnetic pyrrhotite has been suggested to enhance separation.

Despite predicted feasibility, some successes have only recently been attained. We report on the use of Mössbauer Cited by:   The coal mining industry has long used separation methods employing dense media for the reduction of pyrite content of coal.

U.S. Pat. No. 3, describes a process which uses aqueous ferric sulfate or chloride to oxidize pyritic sulfur in coal to .Method of removal of sulfur from coal and petroleum products W. H. Calkins, “The Chemical Forms of Sulfur in Coal: A Review,” Fuel, 73, () Month N/A.

Chemical methods for removing sulfur from coal currently being developed include oxidation (e.g., using oxygen, air, ferric sulfate, chlorine, nitrogen oxides.