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Development Of Enhanced Sulfur Rejection Processes Final Technical Progress Report Third Quarter 8 Quarterly Report July 1 September 30 1994
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Book Synopsis Development of Enhanced Sulfur Rejection Processes. Final Technical Progress Report, Third Quarter (8. Quarterly Report), July 1--September 30, 1994 by :
Download or read book Development of Enhanced Sulfur Rejection Processes. Final Technical Progress Report, Third Quarter (8. Quarterly Report), July 1--September 30, 1994 written by and published by . This book was released on 1996 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pyrite becomes hydrophobic upon superficial oxidation and floats without a collector. The flotation begins to occur at potentials above the stable potentials identified by the chronoamperometry experiments conducted with freshly fractured pyrite. This finding suggests that iron polysulfide, formed during the initial stages of oxidation, is responsible for the flotation. The collectorless flotation is suppressed above the potential where the mineral is aggressively oxidized, forming iron hydroxide and soluble sulfoxy species. The collectorless flotation is less significant at pH 9.2 than at pH 4.6, possibly due to the formation of iron hydroxide. At pH 9.2, the collectorless flotation increases in the presence of EDTA and hydrocarbon oil. The collectorless flotation of pyrite can be suppressed by galvanically coupling the mineral with reactive metals such as aluminum, manganese, and zinc. This effectively prevents the mineral from oxidation. The microflotation tests conducted with mono-sized pyrite samples show that the collectorless flotation can be suppressed effectively in the presence of metal powders. Bench-scale flotation experiments conducted using Denver laboratory flotation cell and a 2-inch diameter Microcel flotation column, also demonstrates that the collectorless flotation can be suppressed in the presence of the reactive metals. It has been established that the most important parameters determining the effectiveness of suppressing pyrite flotation by the galvanic coupling technique are the surface area of the galvanic contractors and the solids concentration of the slurry during conditioning.
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 Development of Enhanced Sulfur Rejection Processes. Final Technical Progress Report, July 1-September 30, 1993 by :
Download or read book Development of Enhanced Sulfur Rejection Processes. Final Technical Progress Report, July 1-September 30, 1993 written by and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Enhanced Sulfur Rejection Processes. Final Technical Progress Report, Fifth Quarter, October 1-December 31,1993 by :
Download or read book Development of Enhanced Sulfur Rejection Processes. Final Technical Progress Report, Fifth Quarter, October 1-December 31,1993 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 Development of Enhanced Sulfur Rejection Processes. Third Quarterly Technical Progress Report, April 1, 1993--June 31, 1993 by :
Download or read book Development of Enhanced Sulfur Rejection Processes. Third Quarterly Technical Progress Report, April 1, 1993--June 31, 1993 written by and published by . This book was released on 1993 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conclusions: Release analyses of Pittsburgh No. 8 and Illinois No. 6 coals show that the -28 mesh size fraction is fine enough to liberate ash and pyrite. Galvanic coupling with sacrificial anodes such as zinc, manganese and aluminum can effectively lower the potential of pyrite. This effect is more significant at pH 4.6 than at pH 9.2. The most negative pyrite potential is achieved when the surface area ratio of anode to pyrite is approximately 4:1. When coupled with pyrite at pH 9.2, the zinc anode exhibited unique potential vs time behavior which is different from that observed with manganese and aluminum. This is believed to be related to the build- up and break-down of zinc hydroxides on the surface. Voltammograms of pyrite at pH 9.2 and 4.6 demonstrated that pyrite surfaces can be significantly changed by galvanic coupling with sacrificial anodes. In flotation tests, metal powders were used as galvanic contactors to reduce the potential and depress pyrite. The potenial may be low enough to remove sulfur species from the surface. Stirred solutions are preferred for the removal of oxidized sulfur species by galvanic coupling; oxygen in solution must to be depleted prior to the addition of sacrificial anodes to effectively lower the pyrite potential. Microflotation studies show that zinc, manganese and iron all depress pyrite. Zinc appears to be the most effective, followed by manganese and then iron. Voltammetry studies indicated that coupling pyrite with zinc, manganese and aluminum reduces and desorbs hydrophobic sulfur products on the surface of pyrite.
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 Development of Enhanced Sulfur Rejection Processes by :
Download or read book Development of Enhanced Sulfur Rejection Processes written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bench-scale Demonstration of Hot-gas Desulfurization Technology. Quarterly Technical Progress Report, July 1, 1994-September 30, 1994 by :
Download or read book Bench-scale Demonstration of Hot-gas Desulfurization Technology. Quarterly Technical Progress Report, July 1, 1994-September 30, 1994 written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improved Secondary Recovery Demonstration for the Sooner Unit. 3rd Quarter Technical Report, Calendar Year 1994, June 1, 1994 - September 30, 1994 by :
Download or read book Improved Secondary Recovery Demonstration for the Sooner Unit. 3rd Quarter Technical Report, Calendar Year 1994, June 1, 1994 - September 30, 1994 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 Production of Elemental Sulfur from H2S and CO2 Derived from a Coal Desulfurization Process. Quarterly Technical Process Report, April 1, 1994--June 30, 1994 by :
Download or read book Production of Elemental Sulfur from H2S and CO2 Derived from a Coal Desulfurization Process. Quarterly Technical Process Report, April 1, 1994--June 30, 1994 written by and published by . This book was released on 1994 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the third quarter of this project, by using the apparatus previously setup for preparation of catalysts, the CoO-MoO3-Al2O3 catalyst was prepared and the thermal stability of the catalyst was tested. Efforts were made on the calibration and the programming of the two column GC of a Perkin Elmer Gas Chromatograph. Column A was used for detecting sulfur related substances such as H2S, COS and CS2, and column B was for CO, CH4 and H2. All of the GC standard curves were obtained. Non-catalytic experiments were carried out by using the packed bed reactor system with blank, filled only with quartz wool and Al2O3 support for future reference. A modified new reactor was designed to quickly quench the reaction and to prohibit the occurrence of re-equilibration of reaction products. Further thermodynamic analyses for the reaction of H2S and CO, were performed using the Stanjan method.
Book Synopsis Standard & Poor's Stock Reports by :
Download or read book Standard & Poor's Stock Reports written by and published by . This book was released on 2004-07 with total page 1554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Climate Change 2007 by : Intergovernmental Panel on Climate Change. Working Group 2
Download or read book Climate Change 2007 written by Intergovernmental Panel on Climate Change. Working Group 2 and published by . This book was released on 2007 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The New York Times Index written by and published by . This book was released on 2002 with total page 2236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Onsite Wastewater Treatment Systems Manual by :
Download or read book Onsite Wastewater Treatment Systems Manual written by and published by . This book was released on 2002 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This manual contains overview information on treatment technologies, installation practices, and past performance."--Introduction.
Author :U.S. Global Change Research Program Publisher :Cambridge University Press ISBN 13 :0521144078 Total Pages :193 pages Book Rating :4.5/5 (211 download)
Book Synopsis Global Climate Change Impacts in the United States by : U.S. Global Change Research Program
Download or read book Global Climate Change Impacts in the United States written by U.S. Global Change Research Program and published by Cambridge University Press. This book was released on 2009-08-24 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summarizes the science of climate change and impacts on the United States, for the public and policymakers.
Book Synopsis Advances in Fingerprint Technology by : Ashim K. Datta
Download or read book Advances in Fingerprint Technology written by Ashim K. Datta and published by CRC Press. This book was released on 2001-06-15 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fingerprints constitute one of the most important categories of physical evidence, and it is among the few that can be truly individualized. During the last two decades, many new and exciting developments have taken place in the field of fingerprint science, particularly in the realm of methods for developing latent prints and in the growth of imag
