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in creator/contributor: "Cobb, J.T."  
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Addition of devolatilization equations to synthane computerized mathematical model. Quarterly report, September 15--December 15, 1978

Description: Six approaches to devolatilization modeling have been reviewed. Two have been selected for further evaluation: the Vand-type model of Anthony and Howard and the diffusion model of Russel et al. The first of these treats particles under kinetic control only. The second includes some mass transfer control along with kinetic control. Behavior of particles in the SYNTHANE process appears to be in the transition region between kinetic and mass transfer control. Work during the next quarter will focu… more
Date: January 1, 1979
Creator: Cobb, J. T., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal desulfurization in a rotary kiln combustor. Final report, March 15, 1990--July 31, 1991

Description: The purpose of this project was to demonstrate the combustion of coal and coal wastes in a rotary kiln reactor with limestone addition for sulfur control. The rationale for the project was the perception that rotary systems could bring several advantages to combustion of these fuels, and may thus offer an alternative to fluid-bed boilers. Towards this end, an existing wood pyrolysis kiln (the Humphrey Charcoal kiln) was to be suitably refurbished and retrofitted with a specially designed versio… more
Date: September 11, 1992
Creator: Cobb, J. T., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal desulfurization in a rotary kiln combustor. Quarterly report No. 1, April 16, 1990--July 15, 1990

Description: BCR National Laboratory (BCRNL) has initiated a project aimed at evaluating the technical and economic feasibility of using a rotary kiln, suitably modified, to burn Pennsylvania anthracite wastes, co-fired with high-sulfur bituminous coal. Limestone will be injected into the kiln for sulfur control, to determine whether high sulfur capture levels can be achieved with high sorbent utilization. The principal objectives of this work are: (1) to prove the feasibility of burning anthracite refuse, … more
Date: August 15, 1990
Creator: Cobb, J. T., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal desulfurization in a rotary kiln combustor

Description: Several issues that could have an impact on the capability to burn anthracite culm in a rotary bed boiler were identified; specifically, questions were raised concerning the specifications of the anthracite culm itself and some relating to the equipment. The anthracite culm delivered was wet, (with more than 10 percent moisture), and coarser than feed material for fluidized boilers. It was felt that using finer fuel, ensuring that it is largely dry, would aid the combustion of anthracite culm. … more
Date: August 29, 1991
Creator: Cobb, J. T., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Coal desulfurization in a rotary kiln combustor

Description: BCR National Laboratory (BCRNL) has initiated a project aimed at evaluating the technical and economic feasibility of using a rotary kiln, suitably modified, to burn Pennsylvania anthracite wastes, co-fired with high-sulfur bituminous coal. Limestone will be injected into the kiln for sulfur control, to determine whether high sulfur capture levels can be achieved with high sorbent utilization. The principal objectives of this work are: (1) to prove the feasibility of burning anthracite refuse, … more
Date: August 15, 1990
Creator: Cobb, J. T., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Coal desulfurization in a rotary kiln combustor

Description: The purpose of this project was to demonstrate the combustion of coal and coal wastes in a rotary kiln reactor with limestone addition for sulfur control. The rationale for the project was the perception that rotary systems could bring several advantages to combustion of these fuels, and may thus offer an alternative to fluid-bed boilers. Towards this end, an existing wood pyrolysis kiln (the Humphrey Charcoal kiln) was to be suitably refurbished and retrofitted with a specially designed versio… more
Date: September 11, 1992
Creator: Cobb, J. T., Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Stabilization of DOE hazardous wastes with clean-coal technology by-products

Description: The objective of this research is to evaluate both the long term and short term stabilization of DOE metal-containing hazardous wastes with clean coal technology (CCT) by-products. This work builds directly on a currently funded DOE/METC project with the University of Pittsburgh (prime contractor) in conjunction with Mill Service (a centralized waste treater), and Dravo Lime Corporation. Studies fall into two categories: (1) observation of the ability of CCT to stabilize and solidify characteri… more
Date: December 31, 1996
Creator: Neufeld, R.D. & Cobb, J.T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cofiring Wood and Coal to Stoker Boilers in Pittsburgh

Description: The prime objective of the University of Pittsburgh's overall wood/coal cofiring program is the successful introduction of commercial cofiring of urban wood wastes into the stoker boilers of western Pennsylvania. Central to this objective is the demonstration test at the Pittsburgh Brewing Company. In this test the project team is working to show that two commercially-available clean wood wastes - tub-ground pallet waste and chipped clearance wood - can be included in the fuel fed daily to an i… more
Date: July 1, 1997
Creator: Cobb, J. T., Jr. & Elder, W. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Coal conversion processes. Quarterly report, December 13, 1983-March 12, 1984

Description: Experimental work is continuing on four separate projects related to coal conversion processes. The direct digital control of exothermic multiphase reactions is being studied in an experimental adiabatic flow reactor. The existence of two stable steady states for the Fischer-Tropsch reaction network at the same temperature and feed condition has been verified and quantified. Various absorbents for SO/sub 2/ and NO/sub X/ are being studied. The absorption of NO/sub 2/ by methanol and N-cyclohexy… more
Date: May 1, 1984
Creator: Cobb, J. T., Jr.; Biloen, P.; Holder, G. D.; Klinzing, G. E. & Tierney, J. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Treatment of metal-laden hazardous wastes with advanced clean coal technology by-products. Quarterly report, June 30--September 30, 1996

Description: During the fourth quarter of Phase 2, work continued on evaluating treatment of the seventh residue of Phase 1, conducting scholarly work, preparing for field work, preparing and delivering presentations, and making additional outside contacts. The work consisted of further testing of the solidification of the seventh hazardous waste--the sandblast residue from paint removal in a building--and examining the microstructure of the products of solidification. There were two treated waste mixtures … more
Date: December 31, 1996
Creator: Cobb, J. T.; Neufeld, R. D. & Blachere, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Treatment of metal-laden hazardous wastes with advanced clean coal technology by-products. Quarterly report, March 30, 1996--June 30, 1996

Description: Progress is described on the use of by-products form clean coal technologies for the treatment of hazardous wastes. During the third quarter of Phase 2, work continued on evaluating Phase 1 samples (including evaluation of a seventh waste), conducting scholarly work, preparing for field work, preparing and delivering presentations, and making additional outside contacts.
Date: April 1, 1998
Creator: Cobb, J. T., Jr.; Neufeld, R. D. & Blachere, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mathematical modeling of the synthane gasifier for non-caking coals

Description: A mathematical model based on IGT kinetics has been developed to simulate the gasification of coal in the Synthane gasifier. Two computer codes have been prepared that incorporate this model. The first, called the analytical code, has been designed primarily to evaluate model parameters from runs on the 4-inch Synthane PDU gasifier. The second, called the predictive code, has been designed to predict temperatures for the zones within the model as well as the effluent products from a stipulation… more
Date: November 1, 1980
Creator: Pukanic, G.W.; Cobb, J.T.; Haynes, W.P.; McMichael, W.J.; Strakey, J.P.; Schehl, R.R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Treatment of metal-laden hazardous wastes with advanced clean coal technology by-products. Quarterly report, September 30--December 30, 1996

Description: This report describes the activities of the project team during the reporting period. The principal work has focused upon microscopic evaluation of sandblast residue treated with two by-products, completing scholarly work, seeking a subcontractor to replace Mill Service, Inc. (MSI) for the field work of Phase 2, preparing and giving a poster, and making and responding to several outside contacts. The main part of this report is found in an appendix entitled, ``Chemistry and microstructure of sa… more
Date: December 31, 1997
Creator: Cobb, J. T., Jr.; Neufeld, R. D.; Blachere, J. R.; Clifford, B. V.; Pritts, J. & Bender, C. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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