272 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Desulfurization"  
Results: 1 - 24 next
open access

Electrochemistry of Thiobacillus ferrooxidans reactions with pyrite

Description: The objective of this project is to provide the fundamental information on the mechanisms of bacterial leaching of pyrite. The knowledge of how bacterial leaching of pyrite functions is essential for design and development of a technology for coal cleaning with bacteria. The features of major electrochemical techniques will be examined to find out if any of them can provide a diagnostic information on the mechanisms of related reactions.
Date: January 1, 1992
Creator: Pesic, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Novel Coal Feeder for Production of Low Sulfur Fuel

Description: During the past three months, the coal feeding system has been tested and currently undergoing evaluation at the University of Cincinnati. The system consists primarily of an auger feed tube which is used to both convey and provide desulfurization of a high sulfur coal feedstock. The coal is conveyed at temperatures ranging from 350 to 550{degrees}C and under normal atmospheric pressure. Under these mild processing conditions, the coal partially pyrolizes and emits sulfur in the form of hydroge… more
Date: January 1, 1990
Creator: Khang, S. J. & Keener, T. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Proof of concept testing of an integrated dry injection system for SO sub x /NO sub x control

Description: The objectives of the subscale test program were designed to provide sorbent and additive selection guidance, and, in so doing, supply answers to the questions posed in the preceding section. The objectives are: Identify the best commercial hydrate sorbent and the best enhanced hydrate sorbent from a list of nine types, based upon S0{sub 2} removal at Ca/S=2. Determine the relative effectiveness of sodium sesquicarbonate versus sodium bicarbonate for S0{sub 2} and NO{sub x} control over the tem… more
Date: January 1, 1989
Creator: Helfritch, D.J.; Bortz, S.J. (Research-Cottrell, Inc., Somerville, NJ (United States). Environmental Services and Technologies Div.) & Beittel, R. (Riley Stoker Corp., Worcester, MA (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Anion-exchange resin-based desulfurization process

Description: Under DOE Grant No. FG22-90PC90309, the University of Tennessee Space Institute (UTSI) is contracted to further develop its anion-exchange, resin-based desulfurization concept to desulfurize alkali metal sulfates. From environmental as well as economic viewpoints, it is necessary to remove soluble sulfates from the wastes created by flue gas desulfurization systems. In order to do this economically, a low-cost desulfurization process for spent sorbents is necessary. UTSI's anion-exchange resin-… more
Date: January 1, 1992
Creator: Sheth, A.C.; Strevel, S.D. & Dharmapurikar, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hot gas desulfurization with oxides of zinc, iron, and vanadium

Description: The objective of this study is to develop an improved sorbent which can reduce H{sub 2}S levels up to 1 ppmv or less, which can stabilize zinc, and produce economically recoverable amounts of elemental sulfur during regeneration. For this purpose, the desulfurization performance of sorbents prepared by the addition of various amounts of V{sub 2}O{sub 5} to the zinc ferrite sorbent is investigated.
Date: January 1, 1992
Creator: Akyurtlu, J.F. & Akyurtlu, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

LIFAC Sorbent Injection Desulfurization Demonstration Project

Description: LIFAC combines upper-furnace limestone injection followed by post- furnace humidification in an activation reactor located between the air preheater and the ESP. The process produces a dry and stable waste product that is partially removed from the bottom of the activation reactor and partially removed at the ESP. In November 1990, after a ten (10) month negotiation period, LIFAC NA and the US DOE entered into a Cooperative Agreement for the design, construction, and demonstration of the LIFAC … more
Date: January 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Process for cleaning and removal of sulfur compounds from low Btu gases. Quarterly summary report, October--December 1977

Description: Problems which occurred in the startup of the remodelled process development unit are described. The extraction section of the plant performed well with sulfur recoveries exceeding the design value of 95%. (LTN)
Date: January 1, 1978
Creator: Moore, R. H.; Ham, D. G.; Mitchell, D. H.; Robertus, R. J. & Stegen, G. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Novel Coal Feeder for Production of Low Sulfur Fuel

Description: A novel coal feeding system is currently undergoing testing and evaluation at the University of Cincinnati. The system consists primarily of an auger feed tube which is used to both convey and provide desulfurization of a high sulfur coal feedstock. The coal is conveyed at temperatures ranging from 350 to 550 {degrees}C and under normal atmospheric pressure. Under these mild processing conditions, the coal partially pyrolizes and emits sulfur in the form of hydrogen sulfide while maintaining a … more
Date: January 1, 1990
Creator: Keener, T. C.; Khang, S. J. & Yu, X. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Proof of concept testing of an integrated dry injection system for SO sub x /NO sub x control

Description: The objective of the subscale test program were designed to provide sorbent and additive selection guidance, and, in so doing, supply answers to the questions posed in the preceding section. The objectives are: Identify the best commercial hydrate sorbent and the best enhanced hydrate sorbent from a list of nine types, based upon S0{sub 2} removal at Ca/S=2. Determine the relative effectiveness of sodium sesquicarbonate versus sodium bicarbonate for S0{sub 2} and NO{sub x} control over the temp… more
Date: January 1, 1990
Creator: Helfritch, D.J.; Bortz, S.J. (Research-Cottrell, Inc., Somerville, NJ (United States). Environmental Services and Technologies Div.) & Beittel, R. (Riley Stoker Corp., Worcester, MA (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of the chemical and electrochemical coal cleaning process

Description: Studies concerning the use of flotation as an alternative method of separating liberated mineral matter from chemical/electrochemical coal cleaning (CECC) treated coal were continued using Elkhorn No. 3 coal. The results obtained using different methods of recovering the clean product after CECC treatment showed trends similar to those observed previously with Pittsburgh No. 8 coal. The use of flotation after CECC treatment of the Elkhorn No. 3 coal was found to be more efficient than wet-scree… more
Date: January 1, 1991
Creator: Basilio, C.I. & Yoon, Roe-Hoan.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Regenerative process for desulfurization of high temperature combustion and fuel gases. Quarterly progress report No. 5, April 1--June 30, 1977

Description: The sulfation rate of reagent-grade monocalcium silicate is of the same order of magnitude as that of limestone and higher than that of reagent-grade calcium oxide. It has been confirmed that the sulfated monocalcium silicate is more regenerable than the sulfated lime, i.e., the regeneration rate is higher with the silicate. X-ray diffraction and IR absorption results indicate that silica is chemically bonded to the calcium sulfate in the sulfated calcium silicate. Construction of a micro-pilot… more
Date: January 1, 1977
Creator: Steinberg, M & Yang, R T
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

700, 100, and 20 hp combustion test facility yearly activity report for the period April 1, 1979 to April 1, 1980

Description: Management and Technical Services Co./ General Electric was awarded the contract to operate, modify and maintain the DOE/PETC 700 hp, 100 hp, and 20 hp Combustion Test Facility. These facilities were designed and built by the Department of Energy at Pittsburgh Energy Technology Center and its ultimate success is the responsibility of DOE/PETC. MATSCO/GE will provide support to assist in the goal of successful operation of this pilot plant facility. The primary objective of the DOE/PETC 700 hp a… more
Date: January 1, 1980
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Surface electrochemical control for fine coal and pyrite separation

Description: This technical progress report, prepared in accordance with the reporting requirements of DOE Project No. DE-AC22-89PC89758, covers the work performed from April 1, 1991 to June 30, 1991. The ongoing work includes the characterization of coal pyrites, the floatability evaluation of three typical US coal samples, the flotation behavior of coal pyrites, the electrochemical measurement of the surface properties of coal pyrites, and the characterization of species produced at pyrite surfaces. 6 ref… more
Date: January 1, 1991
Creator: Hu, Weibai; Huang, Qinping; Riley, A.; Zhu, Ximeng; Bodily, D. M.; Liang, Jun et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis of environmental factors affecting technology deployment: a case study

Description: A study was conducted for the Office of Resource Applications, US Department of Energy (DOE), to assess the potential market and possible market penetration of four electric baseload generating technologies employing coal combustion, in three selected geographic areas of the US, within the time frame between the present and the year 1998. The major focus was on quantification of environmental performance of these technologies and relation of environmental performance to environmental constraint… more
Date: January 1, 1979
Creator: Meyers, C D & Pechan, E H
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sulfur and ash reduction potential and selected chemical and physical properties of United States coals. [Contains glossary]

Description: This report presents the washability and comprehensive characterization results of 543 raw coal samples collected from the Eastern Region of the United States. This is the first volume of a three-volume report on the coals of the United States. All the data are presented in six appendices. Statistical techniques and definitions are presented in Appendix A, and a glossary of terms is presented in Appendix B. The complete washability data and an in- depth characterization of each sample are prese… more
Date: January 1, 1990
Creator: Cavallaro, J.A.; Deurbrouck, A.W.; Killmeyer, R.P.; Fuchs, W. (USDOE Pittsburgh Energy Technology Center, PA (USA)) & Jacobsen, P.S. (Burns and Roe Services Corp., Pittsburgh, PA (USA))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reducing the environmental impact on solid wastes from a fluidized-bed combustor

Description: The use of three options for the reduction of the environmental impact of the solid sorbents used to control SO/sub 2/-emission in fluidized-bed coal combustion systems has been experimentally examined. The three options are: (1) the use of chemical reactivity enhancement agents, such as NaCl, (2) the regeneration and reuse of the limestone and (3) the use of synthetic sorbents. The quantity of waste decreases in the order (1) to (3) while the cost increases in the order (1) to (3). Both the us… more
Date: January 1, 1977
Creator: Johnson, I.; Vogel, G. J.; Montagna, J.; Shearer, J.; Snyder, R.; Swift, W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Anion-exchange resin-based desulfurization process

Description: Under the current grant (FG22-90PC90309), the University of Tennessee Space Institute (UTSI) will carry out the necessary bench scale experiments to further develop it anion-exchange, resin-based desulfurization concept to desulfurize alkali metal sulfates. In particular, it is planned to screen commercially available resins and then carry out process optimization work with three selected resins. Further optimization of the resin regeneration step as well as evaluation of the effect of various … more
Date: January 1, 1991
Creator: Sheth, A.C. & Strevel, S.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes

Description: Removal of sulfur dioxide (SO{sub 2}) from the flue gas of coal- burning power plants can be achieved by duct spray drying using calcium hydroxide (Ca(OH){sub 2}) slurries. A primary objective of this research was to discover the aspects of mass transfer into Ca(OH){sub 2} slurries which limit SO{sub 2} absorption. A bench- scale stirred tank reactor with a flat gas/liquid interface was used to simulate SO{sub 2} absorption in a slurry droplet. The absorption rate of SO{sub 2} from gas concentr… more
Date: January 29, 1992
Creator: Jozewicz, W. (Acurex Corp., Research Triangle Park, NC (United States). Environmental Systems Div.) & Rochelle, G.T. (Texas Univ., Austin, TX (United States). Dept. of Chemical Engineering)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Regenerative Process for Desulfurization of High Temperature Combustion and Fuel Gases. Quarterly Progress Report No. 6, July 1--September 30, 1977

Description: The Brookhaven Regeneration Process, which comprises reacting the sulfated limestone with fly ash from a FBC in a solid-solid contacting kiln-type reactor, has been shown to be more promising than other processes currently under development. Much improvement can be made by optimizing the operating conditions which are primarily: gas flow rate, degree of agitation (rpm), additives (both solids and gases, e.g. steam), types of carbon, etc. TGA kinetic studies also showed promising results. Cyclic… more
Date: January 1, 1977
Creator: Yang, R. T.; Albanese, A. S.; Chen, J. M.; Farber, G.; Kainz, F. B.; Pruzansky, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Permitting and solid waste management issues for the Bailly Station wet limestone Advanced Flue Gas Desulfurization (AFGD) system

Description: Pure Air (a general partnership between Air Products and Chemicals, Inc., and Mitsubishi Heavy Industries America, Inc.). is constructing a wet limestone co-current advanced flue gas desulfurization (AFGD) system that has technological and commercial advantages over conventional FGD systems in the United States. The AFGD system is being installed at the Northern Indiana Public Service Company's Bailly Generating Station near Gary, Indiana. The AFGD system is scheduled to be operational by the S… more
Date: January 1, 1991
Creator: Bolinsky, F.T. (Pure Air, Allentown, PA (United States)); Ross, J. (Northern Indiana Public Service Co., Hammond, IN (United States)); Dennis, D.S. (United Engineers and Constructors, Inc., Denver, CO (United States). Stearns-Roger Div.) & Huston, J.S. (Environmental Alternatives, Inc., Warren NJ (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Theoretical approach for enhanced mass transfer effects in-duct flue gas desulfurization processes

Description: Bench-scale and pilot-scale experiments have been conducted to measure the mass transfer and kinetic rates at simulated duct injection conditions. Section 2 describes the tank reactor test results. The stirred tank reactor was used to study absorption of SO{sub 2} into saturated Ca(OH){sub 2} solutions with varied ionic strengths. The results of current experiments were compared with previous tests using saturated Ca(OH){sub 2} solution and 0.1 M CaCl{sub 2}. Section 3 summarizes the status of … more
Date: January 18, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling of Integrated Environmental Control Systems for Coal-Fired Power Plants Quarterly Report: November-December 1987

Description: This is the first quarterly report of DOE/PETC Contract No. DE-AC22-87PC79864, entitled, Modeling of Integrated Environmental Control Systems for Coal-Fired Power Plants.'' Refining, creating, and documenting of computer models concerning coal/flue gas cleaning and desulfurization are discussed. (VC)
Date: January 1, 1988
Creator: Rubin, E. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Applications of Micellar Enzymology to Clean Coal Technology

Description: This project is designed to develop methods for pre-combustion coal remediation by implementing recent advances in enzyme biochemistry. The novel approach of this study is incorporation of hydrophilic oxidative enzymes in reverse micelles in an organic solvent. Enzymes from commercial sources or microbial extracts are being investigated for their capacity to remove organic sulfur from coal by oxidation of the sulfur groups, splitting of C-S bonds and loss of sulfur as sulfuric acid Dibenzothiop… more
Date: January 20, 1990
Creator: Walsh, C. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen