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Reactivity Of Target Compounds For Chemical Coal Desulfurization Technical Report March 1 1994 May 31 1994
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Book Synopsis Reactivity of Target Compounds for Chemical Coal Desulfurization. Technical Report, March 1, 1994--May 31, 1994 by :
Download or read book Reactivity of Target Compounds for Chemical Coal Desulfurization. Technical Report, March 1, 1994--May 31, 1994 written by and published by . This book was released on 1994 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project seeks to identify representative organosulfur compounds which are removed by known coal desulfurization reactions. Demineralized coals are solvent extracted and the extracts fractionated to concentrate organosulfur compounds for analysis by Gas Chromatography/Mass Spectroscopy. After sulfur compounds are characterized, the parent extracts are subjected to reactions previously shown to reduce the organic sulfur content of Illinois coals, fractionated and again analyzed for organosulfur content to determine if the identified compounds reacted during the chemical treatment. The original coal also will be subjected to chemical desulfurization, extraction, fractionation and analysis in order to correlate changes in organic sulfur content of the coal with reactions of specific sulfur compounds. These compounds can thus be reliably considered as target molecules for the next generation of desulfurization processes. Work during this quarter has shown that fractionation and chromatography of pyridine extracts to isolate suitable samples for GC/MS analysis, although time-consuming, appears to be better than direct toluene extraction in terms of providing a representative set of compounds for analysis. The toluene soluble fractions prepared by this route contain aromatic sulfur compounds and O, N, S-containing hetrocycles. A set of these compounds has been identified and their fate following desulfurization of the parent coal extracts is under investigation. Previously studied desulfurization reactions using the single electron transfer reagent, K/THF/naphthalene, and the reactive nickel boride reagent have been repeated and analyzed by GC/MS. SET and nickel boride reactions of the THF soluble portions of pyridine coal are currently in progress.
Book Synopsis Reactivity of Target Compounds for Chemical Coal Desulfurization. Final Technical Report, September 1, 1993--August 31, 1994 by :
Download or read book Reactivity of Target Compounds for Chemical Coal Desulfurization. Final Technical Report, September 1, 1993--August 31, 1994 written by and published by . This book was released on 1994 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reactivity of Target Compounds for Chemical Coal Desulfurization. Technical Report, 1 December 1993--28 February 1994 by :
Download or read book Reactivity of Target Compounds for Chemical Coal Desulfurization. Technical Report, 1 December 1993--28 February 1994 written by and published by . This book was released on 1994 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project seeks to identify representative organosulfur compounds which are removed by coal desulfurization reactions. Demineralized coals from the Illinois Basin Coal Sample Program are solvent extracted and the extracts fractionated to separate and concentrate organosulfur compounds for analysis by Gas Chromatography/Mass Spectroscopy. After sulfur compounds are characterized, the parent extracts will be subjected to reactions previously shown to reduce the organic sulfur content of Illinois coals, fractionated and again analyzed for organosulfur content to determine which compounds reacted during the chemical treatment. The original coal will be subjected to chemical desulfurization, extraction, fractionation and analysis in order to correlate changes in organic sulfur content of the coal with reactions of specific sulfur compounds. These compounds can thus be reliably considered as target molecules for the next generation of desulfurization processes. During this quarter, work continued on developing efficient methods to isolate and analyze sulfur-rich coal extract fractions by GC/MS. Since only relatively non-polar compounds can be analyzed, pyridine extracts must be fractionated. Direct extraction of several coals with toluene is quicker but did not give as much toluene soluble material as fractionation of pyridine extracts and is thus not suitable for preparation of representative analytical samples. The authors observe that most IBC sample program coals contain elemental sulfur due to oxidation of pyrite. There is less elemental sulfur in IBC-101 than in other Herrin coals. This coal was washed in a preparation plant to reduce pyrite concentration. Since elemental sulfur slowly reacts to produce organosulfur compounds in coal during storage or handling, this suggests that early removal of pyrite can reduce formation of these hard to remove compounds.
Book Synopsis Reactivity of Target Compounds for Chemical Coal Desulfurization. Quarterly Technical Report, September 1, 1993--November 30, 1993 by :
Download or read book Reactivity of Target Compounds for Chemical Coal Desulfurization. Quarterly Technical Report, September 1, 1993--November 30, 1993 written by and published by . This book was released on 1993 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project seeks to determine the identity of representative organosulfur compounds removed by coal desulfurization reactions. Demineralized coals from the Illinois Basin Coal Sample Program are solvent extracted and the extracts fractionated to separate and concentrate the organosulfur compounds for analysis by Gas Chromatography/Mass Spectroscopy. After the sulfur compounds are characterized, the parent extracts will be subjected to reactions previously shown to reduce the organic sulfur content of Illinois coals. The treated extracts will be fractionated and analyzed for organosulfur content by the same method to determine which compounds reacted during the chemical treatment. Finally, the original coal will be subjected to chemical desulfurization, extraction, fractionation and analysis in order to correlate changes in organic sulfur content of the coal with reactions of specific sulfur compounds. These compounds can thus be reliably considered as target molecules for the next generation of desulfurization processes. Work during this quarter included studies to increase the amount of soluble material extracted from coal by several solvents and development of standard chromatographic methods for fractionation and analysis of soluble coal fractions. Pyridine solubility of several coals is enhanced by removal of mineral matter prior to extraction. The effect is modest (12% relative increase) for Illinois No. 6 coal and greater for lower rank coal. Ultrasound and swelling agents cause a large increase in pyridine solubility. Although toluene extracts much less material from Illinois coals than pyridine, removal of mineral matter prior to extraction causes a relatively larger increase in extraction yield (60 - 80% relative increase). Expected aromatic sulfur compounds such as dibenzothiophene have been detected by GC/MS analysis of non-polar fractions of Illinois No. 6 extracts and several oxidized thiophenes were detected in extracts of weathered IBC-105 coal.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1995 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reactivity of Target Compounds for Chemical Coal Desulfurization by : David H. Buchanan
Download or read book Reactivity of Target Compounds for Chemical Coal Desulfurization written by David H. Buchanan and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reactivity of Target Compounds for Chemical Coal Desulfurization by :
Download or read book Reactivity of Target Compounds for Chemical Coal Desulfurization written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1995 with total page 1686 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Book Synopsis Protocols for the Selective Cleavage of Carbon-sulfur Bonds in Coal. [Quarterly] Technical Report, March 1, 1993--May 31, 1993 by :
Download or read book Protocols for the Selective Cleavage of Carbon-sulfur Bonds in Coal. [Quarterly] Technical Report, March 1, 1993--May 31, 1993 written by and published by . This book was released on 1993 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical reactions that result in carbon-sulfur bond cleavage are an essential aspect of any protocol designed to remove organic sulfur from coal. Planned in the second year of our project ''Protocols for the Selective Cleavage of Carbon-Sulfur Bonds in Coal'' are investigations of reactions in which organic sulfur-containing coal model compounds are subjected to different conditions of temperature, solvent mixtures and radiation. other investigations that will result in analyses of the likelihood of C-S bond cleavages resulting from various oxidative processes will also be undertaken. Summarized in this quarterly report are results of our investigations of the following topics: (a) desulfurization of coal model sulfones and sulfides; (b) photolytic desulfurization of coal; (c) differential scanning calorimetric experiments on photooxidized coal; and (d) discussions on C-S bond strengths in radical cations.
Book Synopsis Production and Use of Activated Char for Combined SO2/NO3 Removal. Technical Report, March 1, 1994--May 31, 1994 by :
Download or read book Production and Use of Activated Char for Combined SO2/NO3 Removal. Technical Report, March 1, 1994--May 31, 1994 written by and published by . This book was released on 1994 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Carbon adsorbents have been shown to remove sulfur oxides from flue gas, and also serve as a catalyst for reduction of nitrogen oxides at temperatures between 80 and 150°C. The overall objective of this project is to determine whether Illinois coal is a suitable feedstock for the production of activated char which could be used as a catalyst for combined SO2/NO3 removal, and to evaluate the potential application of the products in flue gas cleanup. Key production variables will be identified to help design and engineer activated char with the proper pore structure and surface chemistry to enable the development of an effective SO2/NO3 removal catalyst. The ISGS agreed to provide 500 pounds of activated char to STEAG for tests in a demonstration unit to clean flue gas from a U.S. waste incinerator. The STEAG process requires an activated char with a N2 BET surface area
Book Synopsis Protocols for the Selective Cleavage of Carbon-sulfur Bonds in Coal. Final Technical Report, September 1, 1992--December 31, 1993 by :
Download or read book Protocols for the Selective Cleavage of Carbon-sulfur Bonds in Coal. Final Technical Report, September 1, 1992--December 31, 1993 written by and published by . This book was released on 1993 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of research pertaining to chemical reactions that aim to selectively cleave C-S bonds in model compounds as well as Illinois coal are summarized. Chemical reactions that result in carbon-sulfur bond cleavage are an essential aspect of any protocol designed to remove organic sulfur from coal. In the second year of the project ''Protocols for the Selective Cleavage of Carbon-Sulfur Bonds in Coal'' investigations of reactions in which organic sulfur-containing coal model compounds are subjected to different conditions of temperature, solvent mixtures, reagents, and radiation have been completed. A series of reactions have been undertaken in which physically cleaned Illinois coal has been subjected to many of the same reaction conditions that were shown, via the use of model sulfides, to result in substantial C-S bond cleavage and or sulfur oxidation. Therefore, summarized in this final report are results of the investigations of the photooxidation reactions of coal model sulfones and sulfides; the photolytic desulfurization of coal; and various other topics, including a summary of endeavors aimed at initiating C-S bond cleavage reactions using oxidation/chlorination/desulfurization protocols, and various tellurium reagents.
Book Synopsis Protocols for the Selective Cleavage of Carbon-sulfur Bonds in Coal. Interim Final Technical Report, September 1, 1992--August 31, 1993 by :
Download or read book Protocols for the Selective Cleavage of Carbon-sulfur Bonds in Coal. Interim Final Technical Report, September 1, 1992--August 31, 1993 written by and published by . This book was released on 1993 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents results of research pertaining to chemical reactions that aim to selectively cleave C-S bonds in model compounds as well as Illinois coal. Chemical reactions that result in carbon-sulfur bond cleavage are an essential aspect of any protocol designed to remove organic sulfur from coal. In the second year of the project {open_quotes}Protocols for the Selective Cleavage of Carbon-Sulfur Bonds in Coal, the author has completed investigations of reactions in which organic sulfur-containing coal model compounds are subjected to different conditions of temperature, solvent mixtures, reagents, and radiation. He has also undertaken a series of reactions in which physically cleaned Illinois coal has been subjected to many of the same reaction conditions that were shown, via the use of model sulfides, to result in substantial C-S bond cleavage and or sulfur oxidation. Therefore, summarized in this interim final report are results of the investigations of the photooxidation reactions of coal model sulfones and sulfides; the photolytic desulfurization of coal; and various other topics, including a summary of the endeavors aimed at initiating C-S bond cleavage reactions using oxidation/chlorination/desulfurization protocols, and various tellurium reagents. Important experiments remain to be completed on this project; therefore, efforts in these areas will continue through the end of calendar year 1993.
Book Synopsis Nitrogen oxides (NOx) why and how they are controlled by :
Download or read book Nitrogen oxides (NOx) why and how they are controlled written by and published by DIANE Publishing. This book was released on 1999 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Protocols for the Selective Cleavage of Carbon-sulfur Bonds in Coal. Technical Report, December 1, 1992--February 28, 1993 by :
Download or read book Protocols for the Selective Cleavage of Carbon-sulfur Bonds in Coal. Technical Report, December 1, 1992--February 28, 1993 written by and published by . This book was released on 1993 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chemical reactions that result in carbon-sulfur bond cleavage are an essential aspect of any protocol designed to remove organic sulfur from coal. Planned in the second year of our project Protocols for the Selective Cleavage of Carbon-Sulfur Bonds in Coal are investigations of reactions in which organic sulfur-containing coal model compounds are subjected to different conditions of temperature, solvent mixtures and radiation. Other investigations that will result in analyses of the likelihood of C-S bond cleavages resulting from various oxidative processes will also be undertaken. Summarized in this quarterly report are results of our investigations of the following topics: (a) desulfurization of coal model sulfones; (b) desulfurization of coal model sulfides; (c) photooxidation of organic sulfides; and (d) photolytic desulfurization of coal.
Download or read book לאה'קה הנערה מפלאנטש written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Molecular Biological Enhancement of Coal Biodesulfurization. Final Technical Report, September 1, 1993--August 31, 1994 by :
Download or read book Molecular Biological Enhancement of Coal Biodesulfurization. Final Technical Report, September 1, 1993--August 31, 1994 written by and published by . This book was released on 1994 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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