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Mechanisms and optimization of coal combustion. Quarterly progress report

Description: During the past quarter, protocols for pyrolysis and combustion experiments were developed. The performance of the new control algorithms was evaluated, particularly for the rapid pyrolysis experiments where heating rates ranging from 100 to 1,000 C/s were achieved. Finally, a new digital image analysis procedure was developed to detect and quantify thermal ignitions of burning coal or char particles.
Date: December 31, 1997
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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COMBUSTION CHARACTERIZATION OF COAL-WATER SLURRY FUEL PREPARED FROM PLANT COAL AND RECOVERED COAL FINES

Description: In the process of coal cleaning operations, a significant amount of coal is washed away as waste into the ponds. Clearly, such a large quantity of dumped coal fines has a detrimental effect on the environment. This investigation presents in innovative approach to recover and utilize waste coal fines from the preparation plant effluent streams and tailing ponds. Due to the large moisture content of the recovered coal fines, this study is focused on the utilization of coal fines in the coal-water… more
Date: July 1, 1997
Creator: Masudi, Houshang
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fluid Dynamics of Pressurized, Entrained Coal Gasifiers

Description: Pressurized, entrained gasification is a promising new technology for the clean and efficient combustion of coal. Its principle is to operate a coal gasifier at a high inlet gas velocity to increase the inflow of reactants, and at an elevated pressure to raise the overall efficiency of the process. Unfortunately, because of the extraordinary difficulties involved in performing measurements in hot, pressurized, high-velocity pilot plants, its fluid dynamics are largely unknown. Thus the designer… more
Date: March 31, 1997
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Task 3.0 - Advanced Power Systems Subtask 3.18 - Ash Behavior in Power Systems

Description: Ash behavior in power systems can have a significant impact on the design and performance of advanced power systems. The Energy & Environmental Research Center (EERC) has focused significant effort on ash behavior in conventional power systems that can be applied to advanced power systems. This initiative focuses on filling gaps in the understanding of fundamental mechanisms of ash behavior that has relevance to commercial application and marketable products. This program develops methods and m… more
Date: July 1, 1997
Creator: Zygarlicke, Christopher J. & McCollor, Donald P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Second Generation Advanced Reburning for High Efficiency N0x Control

Description: Energy and Environmental Research Corporation is developing a family of high efficiency and low cost NO{sub x} control technologies for coal fired utility boilers based on Advanced Reburning (AR), a synergistic integration of basic reburning with injection of an N-agent. In conventional AR, injection of the reburn fuel is followed by simultaneous N-agent and overfire air injection. The second generation AR systems incorporate several components which can be used in different combinations. These… more
Date: December 31, 1997
Creator: Zamansky, Vladimir M.; Maly, Peter, M.; Sheldon, Mark; Seeker, W. Randall & Folsom, Blair A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Integrated demonstration of molten salt oxidation with salt recycle for mixed waste treatment

Description: Molten Salt Oxidation (MSO) is a thermal, nonflame process that has the inherent capability of completely destroying organic constituents of mixed wastes, hazardous wastes, and energetic materials while retaining inorganic and radioactive constituents in the salt. For this reason, MSO is considered a promising alternative to incineration for the treatment of a variety of organic wastes. Lawrence Livermore National Laboratory (LLNL) has prepared a facility and constructed an integrated pilot-sca… more
Date: November 1, 1997
Creator: Hsu, P.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Millisecond Burning of Confined Energetic Materials During Cookoff

Description: The response of a system containing an energetic material (EM) to an abnormal thermal environment is termed cookoff. To predict the violence of reaction of confined energetic materials during cookoff requires a description of the relevant physical processes that occur on time scales Ranging from days to submicroseconds. The time-to-ignition can be characterized accurately using heat transfer with chemistry and quasistatic mechanics. After ignition the energetic material deflagrates on a millise… more
Date: November 1, 1997
Creator: Schmitt, R. G. & Baer, T. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Bioenergy From Willow. 1995 Annual Report, November 1987--December 1995

Description: Experiments were established at Tully, New York, by the State University of New York College of Environmental Science and Forestry, in cooperation with the University of Toronto and the Ontario Ministry of Natural Resources, to assess the potential of willows for wood biomass production. Specific objectives included determining the effects of clone type, fertilization, spacing, cutting cycle, and irrigation on biomass production. Production was high, with willow clone SV1 yielding nearly 32 ove… more
Date: July 1, 1997
Creator: White, E. H. & Abrahamson, L. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Structure-Based Predictive Model for Coal Char Combustion Quarterly Technical Progress Report: October - December 1996

Description: The first quarter of this project was used to carry out a detailed planning process to coordinate the various aspects of this collaborative effort. A workshop was held at Brown University on December 4, 1996, attended by all project participants and key visitors, in which presentations were given by the principal investigators on their respective subtasks. The planning process culminated in the completion of a comprehensive document submitted to DOE / FETC under separate cover. Following the pl… more
Date: March 28, 1997
Creator: Hurt, R.; Calo, J.; Essenhigh, R.; Hadad, C. & Stanley, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Structure-Based Predictive Model for Coal Char Combustion Quarterly Technical Progress Report: April - June 1997

Description: During the third quarter of this project, progress was made on both major technical tasks. Progress was made in the chemistry department at OSU on the calculation of thermodynamic properties for a number of model organic compounds. Modelling work was carried out at Brown to adapt a thermodynamic model of carbonaceous mesophase formation, originally applied to pitch carbonization, to the prediction of coke texture in coal combustion. This latter work makes use of the FG-DVC model of coal pyrolys… more
Date: September 24, 1997
Creator: Hurt, R.; Colo, J.; Essenhigh, R.; Hadad, C. & Stanley, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Structure-Based Predictive Model for Coal Char Combustion Quarterly Technical Progress Report: January - March 1997

Description: During the second quarter of this project, progress was made on both major technical tasks. Three parallel efforts were initiated on the modeling of carbon structural evolution. Structural ordering during carbonization was studied by a numerical simulation scheme proposed by Alan Kerstein involving molecular weight growth and rotational mobility. Work was also initiated to adapt a model of carbonaceous mesophase formation, originally developed under parallel NSF funding, to the prediction of co… more
Date: June 25, 1997
Creator: Hurt, R.; Calo, J.; Essenhigh, R.; Hadad, C. & Stanley, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of Accelerants and Fire Debris Using Aroma Detection Technology

Description: The purpose of this work was to investigate the utility of electronic aroma detection technologies for the detection and identification of accelerant residues in suspected arson debris. Through the analysis of known accelerant residues, a trained neural network was developed for classifying suspected arson samples. Three unknown fire debris samples were classified using this neural network. The item corresponding to diesel fuel was correctly identified every time. For the other two items, wide … more
Date: January 17, 1997
Creator: Barshick, S. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dilute Oxygen Combustion Phase I Final Report

Description: A novel burner, in which fuel (natural gas) and oxidant (oxygen or air) are separately injected into a furnace, shows promise for achieving very low nitrogen oxide(s) (NOx) emissions for commercial furnace applications. The dilute oxygen combustion (DOC) burner achieves very low NOx through in-furnace dilution of the oxidant stream prior to combustion, resulting in low flame temperatures, thus inhibiting thermal NOx production. The results of a fundamental and applied research effort on the dev… more
Date: October 31, 1997
Creator: Ryan, H.M.; Riley, M.F. & Kobayashi, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High Temperature Electrochemical Polishing of H{sub 2}S from Coal Gasification Process Streams. Quarterly Progress Report, April 1, 1996--June 30, 1996

Description: Coal may be used to generate electrical energy by any of several processes, most of which involve combustion or gasification. Combustion in a coal-fired boiler and power generation using a steam-cycle is the conventional conversion method; however total energy conversion efficiencies for this type of process are only slightly over 30%. Integration of a gas-cycle in the process (combined cycle) may increase the total conversion efficiency to 40%. Conversion processes based on gasification offer … more
Date: December 31, 1997
Creator: Winnick, Jack
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Biomass power for rural development. Quarterly report, January 1, 1997--April 1, 1997

Description: The following information summarizes the major areas of project activities accomplished during the last quarter. Activities addressing conversion technology have been geared towards gathering information and drawing comparisons to specific project need. Of major benefit was the trip taken to Denmark by Project Manager, Edward Woolsey. The first section of this report provides an overview of his experiences and findings. As a follow up to this trip, representatives from Iowa State University and… more
Date: May 1, 1997
Creator: Cooper, James T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of Technologies for a High Efficiency, Very Low Emission, Diesel Engine for Light Trucks and Sport Utility Vehicles

Description: Cummins Inc., in partnership with the Department of Energy, has developed technology for a new highly efficient, very low emission, diesel engine for light trucks and sport utility vehicles. This work began in April 1997, and started with very aggressive goals for vehicles in the 5751 to 8500 pound GCW weight class. The primary program goals were as follows: (1) EMISSIONS NOx = 0.50 g/mi PM = 0.05 g/mi CO = 2.8 g/mi NMHC = 0.07 g/mi California decided to issue new and even tougher LEV II light … more
Date: December 1, 1997
Creator: Stang, John H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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FUNCTIONALLY GRADED ALUMINA/MULLITE COATINGS FOR PROTECTION OF SILICON CARBIDE CERAMIC COMPONENTS FROM CORROSION

Description: The main objective of this research project is the formulation of processes that can be used to prepare compositionally graded alumina/mullite coatings for protection from corrosion of silicon carbide components (monolithic or composite) used or proposed to be used in coal utilization systems (e.g., combustion chamber liners, heat exchanger tubes, particulate removal filters, and turbine components) and other energy-related applications. Mullite will be employed as the inner (base) layer and th… more
Date: October 1, 1997
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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TIDD PFBC Demonstration Project. Second quarterly report, 1994

Description: Major activities during this period include: (1) The unit operated for 1529 hours on coal, bringing the grand total for coal fire through the end of the quarter to 7847 hours. (2) During the quarter, the Tidd Plant set a new record for its longest continuous run on coal; 1079 hours, surpassing its previous record of 740 hours set in June-July of 1992. (3) The unit availability for the first half of 1994 was 54.7%. (4) There were four gas turbine starts, eight bed preheater starts, and six opera… more
Date: July 1, 1997
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experiments and Computational Modeling of Pulverized Coal Ignition

Description: Under typical conditions of pulverized coal combustion, which is characterized by fines particles heated at very high rates, there is currently a lack of certainty regarding the ignition mechanism of bituminous and lower rank coals. It is unclear whether ignition occurs first at the particle oxygen interface (heterogeneous ignition) or if it occurs in the gas phase due to ignition of the devolatilization products (homogeneous ignition). Furthermore, there have been no previous studies aimed at … more
Date: May 1, 1997
Creator: Chen, J. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Kinetics and Mechanisms of NO(x) - Char Reduction

Description: The emission of nitrogen oxides from combustion of coal remains a problem of considerable interest, whether the concern is with acid rain, stratospheric ozone chemistry, or greenhouse gases. Whereas earlier the concern was focused mainly on NO (as a primary combustion product) and to a lesser extent N0{sub 2} (since it is mainly a secondary product of combustion, e.g. see ref. 1), in recent years the emissions of N{sub 2}0 have also captured considerable attention, particularly in the context o… more
Date: September 1, 1997
Creator: Suuberg, E.M.; Lilly, W.D. & Aarna, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nonequilibrium sulfur capture and retention in an air cooled slagging coal combustor

Description: Calcium oxide injected in a slagging combustor react with the sulfur from coal combustion to form sulfur bearing particles, which are deposited on the liquid slag layer on the combustor wall. Due to the low solubility of sulfur in slag, it must be drained from the combustor to limit sulfur gas re-evolution. Analysis indicated that slag mass flow rates in excess of 400 lb/hr should limit sulfur re- evolution. The objective of this 36 month project was to perform a series of 16 one day tests to d… more
Date: August 13, 1997
Creator: Zauderer, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Computational Modeling and Experimental Studies on NO(x) Reduction Under Pulverized Coal Combustion Conditions

Description: During this quarter efforts were made to conduct reburning experiments with coal. Our efforts met with partial success but there arose persistent problems with the operation of the coal feeder. This entire quarter has been the most challenging time for the research team in terms of solving the problems and carrying out the intended experiments. Discussed below are some of the results as well as challenges. We hope to overcome the problems in due time. At the writing of this report, some parts o… more
Date: September 1, 1997
Creator: Kumpaty, S. K.; Subramanian, K. & Hodges, T. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Computational Modeling and Experimental Studies on NO(x) Reduction Under Pulveerized Coal Combustion Conditions. Quarterly technical progress report, July 1 - September 30, 1997

Description: Several experiments were conducted during this quarter to study the NO{sub x} reduction effectiveness of lignite coal, activated carbon and catalytic sites such as calcium sulfide and calcium carbide. While some of the coals/chemicals could be fed easily, some needed the mixing with silica gel to result in a uniform flow through the feeder. Several trial runs were performed to ensure proper feeding of the material before conducting the actual experiment to record NO{sub x} reduction. The experi… more
Date: December 31, 1997
Creator: Kumpaty, S. K.; Subramanian, K.; Darboe, A. & Kumpati, S. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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