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Rheological properties essential for the atomization of coal water slurries (CWS)

Description: The overall objective of this project is to perform experiments to understand the effect of high shear and extensional properties on the atomization of coal-water slurries (CWS). Several CWS were prepared and their low shear rheological properties (i.e. rheology as a function of concentration, constant shear and, additive type, stability and slip effect) performed. The stability was determined using a settling column to study the shift in mass of the CWS as a function of time. Low shear testing… more
Date: January 1, 1992
Creator: Ohene, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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[Roles of Additives and Surface Control in Slurry Atomization]

Description: Our experimental results clearly demonstrate that the shape of particles with aspect ratio close to unity dictates the relative suspension viscosity. Suspensions of irregularly shaped particles have higher relative viscosities than suspensions of spherical particles at same volume fractions, in agreement with the reported results at high shear conditions. The relative viscosity of a Newtonian suspension is in excellent agreement with that predicted by the Krieger/Dougherty rigid sphere model us… more
Date: January 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pelletizing/reslurrying as a means of distributing and firing clean coal

Description: The objective of this study is to develop technology that permits the practical and economic preparation, storage, handling, and transportation of coal pellets, which can be formulated into Coal-Water Fuels (CWFs) suitable for firing in small- and medium-size commercial and industrial boilers, furnaces, and engines.
Date: September 20, 1991
Creator: Conkle, H. N.; Raghavan, J. K.; Smit, F. J. & Jha, M. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mulled coal: A beneficiated coal form for use as a fuel or fuel intermediate

Description: Energy International is developing a technology that will create a staged formulation with the first coal form (Mulled Coal) that can be stored, transported, and pumped. Just prior to combustion, the Mulled Coal (MC) is modified to provide the properties needed for proper atomization. This concept is an alternative to the expensive and energy intensive thermal drying processing of fine coal wetcakes. The material is suitable for both direct feed use in conventional and fluid bed combustors as w… more
Date: May 1, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pelletizing/reslurrying as a means of distributing and firing clean coal

Description: The objective of this study is to develop technology that permits the practical and economic preparation, storage, handling, and transportation of coal pellets, which can be reslurried into Coal water fuels (CWF) suitable for firing in small- and medium-size commercial and industrial boilers, furnaces, and engines. The project includes preparing coal pellets and capsules from wet filter cake that can be economically stored, handled, transported, and reslurried into a CWF that can be suitably at… more
Date: November 21, 1991
Creator: Conkle, H. N.; Raghavan, J. K.; Smit, F. J. & Jha, M. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of a Vortexing Combustor (VC) for space/water heating applications (proof-of-concept model development)

Description: This in the third quarterly technical progress report for DE-AI2287PC79660 covering the period between 1 May and 31 July 1988. During this reporting period, the firing test of Dry Ultrafine Coal (DUC) in the 0.15 MB/H exploratory model has continued. Sufficient experience and insight have been accumulated to help finalize the design of the 0.6 MB/H experimental model. Fabrication of the 0.6 MB/H model in 33% complete. A Coal-Water Fuel (CWF) loop for firing tests and an apparatus for testing CW… more
Date: September 1, 1988
Creator: Fu, T. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Correlation of stability/rheology relationship with coal: Properties and chemical additives

Description: Coal-water slurries have the potential of a near term replacement for fuel oil. In order to gain the fundamental understanding of the preparation and handling of coal-water slurries, experiments were performed to identify the relationship between the coal content of a given coal-water slurry and its physical and chemical properties. The objectives of this program were: Investigate the relationship between the chemical and physical properties of coal and the rheology of coal-water slurry Define … more
Date: February 19, 1992
Creator: Ohene, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Laser Velocimeter Measurements of Multiphase Flow of Solids

Description: A unique refractive index matched facility for studying solid-liquid multiphase flow has been developed. The refractive index matching of the solid and the liquid allows the use of non-intrusive Laser Doppler Velocimetry (LDV) to measure the solid and the liquid velocities. These measurements will be useful in developing a better understanding of solid-liquid flows, especially solid-liquid and solid-solid interactions. Silica gel and 50% sodium iodide solution in water (refractive index {approx… more
Date: January 1, 1989
Creator: Kadambi, J. R.; Chen, R. C. & Bhunia, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of a vortexing combustor (VC) for space/water heating applications (proof-of-concept model development)

Description: This is the second Technical Progress Report for DE-AI22-87PC79660 covering the period 1 February to 30 April 1988. Our main effort during this reporting period is to use the 0.15 MB/H exploratory vortexing combustor hot model as a tool to develop information leading toward the proof-of-concept model design. This 0.15 MB/H model has been operational and performs satisfactorily in firing ultrafine coal. To date, about 50 hours of running time has been logged and about 500 pounds of ultrafine coa… more
Date: June 1, 1988
Creator: Fu, T. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development and testing of a commercial-scale coal-fired combustion system, Phase 3

Description: Within the commercial sector, oil and natural gas are the predominant fuels used to meet the space-heating needs of schools, office buildings, apartment complexes, and other similar structures. In general, these buildings require firing rates of 1 to 10 million Btu/hr. The objective of this program is to demonstrate the technical and economic viability of a coal-fired combustion system for this sector. The commercial-scale coal-water slurry (CWS)-fired space heating system will be a scale-up of… more
Date: March 1, 1991
Creator: Litka, A. F. & Breault, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of a Vortex Combustor (VC) for space/water heating applications (proof-of-concept model development)

Description: Based on the results and experience gained from the exploratory model tests, a 0.6 MB/H experimental model has been designed and the construction is nearly complete. This model incorporates a variable (cooling surface area) center heat removal unit and flexible air flow rate and velocity controls. It is also readily convertible to an outside heat removal arrangement for capacity increase. Suitable instrumentation will be installed obtaining quantitative data for finalizing the design of the pro… more
Date: January 1, 1989
Creator: Fu, T. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characteristics of American coals in relation to their conversion into clean energy fuels. Quarterly technical progress report, July--September 1976. [15 refs]

Description: Under Facet I, 158 coal samples have been added to the Penn State/ERDA Sample Bank. Sixty-nine sets of analytical data and one characterized coal sample were provided upon request to other agencies. Facet IV-A research on reactor development and operation shows that the gasification zone of a fuel bed is not diffusionally controlled. Pyrolysis of pulverized coal occurs under essentially isothermal conditions within the laminar flow furnace. Methanol densities of chars, work on which has recentl… more
Date: December 1, 1976
Creator: Spackman, W.; Davis, A.; Walker, P. L.; Lovell, H. L.; Essenhigh, R. H.; Vastola, F. J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of calcium magnesium acetate on the combustion of Coal-Water Slurry

Description: The general objective of the project is to investigate the combustion behavior of single and multiple Coal-Water Slurry particles burning at high temperature environments. Both uncatalyzed as well as catalyzed CWS drops with Calcium Magnesium Acetate (CMA) catalyst will be investigated. Emphasis will also be given in the effects of CMA on the sulfur capture during combustion.
Date: January 1, 1990
Creator: Levendis, Y. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Gasifier feed - Tailor-made from Illinois coals

Description: The main purpose of this project is to produce a feedstock from preparation plant fines from an Illinois coal that is ideal for a slurry fed, slagging, entrained-flow coal gasifier. The high sulfur content and high Btu value of Illinois coals are particularly advantageous in such a gasifier; preliminary calculations indicate that the increased cost of removing sulfur from the gas from a high sulfur coal is more than offset by the increased revenue from the sale of the elemental sulfur; addition… more
Date: January 1, 1992
Creator: Ehrlinger, H. P., III; Lytle, J.; Frost, R. R.; Lizzio, A.; Kohlenberger, L. & Brewer, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Industrial and utility applications coal-oil mixture data index. [Oil-fired systems]

Description: The seriousness of the present and projected national energy picture dictated the adoption of several approaches by the Department of Energy (DOE) to develop alternate fuel sources as a means of curtailing our present dependence on imported oil. One approach, which offers near term potential for reducing the domestic consumption rate of natural gas and oil, is the application of coal-oil mixture (COM) combustion technology. The idea of burning coal and oil in the form of a mixture has been arou… more
Date: May 1, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Integrated low emission cleanup system for direct coal-fueled turbines (electrostatic agglomeration)

Description: The objective of this contract is to investigate the removal of So{sub x} and particulate matter from direct coal-fired combustion gas streams at high temperature and high pressure conditions. This investigation will be accomplished through a bench-scale testing and evaluation program employing sorbent mixed with a coal-water slurry for So{sub x} removal, and an innovative particulate control concept. The particulate control device utilizes electrostatic agglomeration followed by a high efficie… more
Date: February 1, 1992
Creator: Quimby, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Integrated low emission cleanup system for direct coal-fueled turbines (electrostatic agglomeration)

Description: The objective of this contract is to investigate the removal of SO[sub x] and particulate matter from direct coal-fired combustion gas streams at high temperature and high pressure conditions. This investigation will be accomplished through a bench-scale testing and evaluation program employing sorbent mixed with a coal-water slurry for SO[sub x] removal, and an innovative particulate control concept. The particulate control device utilizes electrostatic agglomeration followed by a high efficie… more
Date: May 1, 1992
Creator: Quimby, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Abrasive wear by coal-fueled diesel engine and related particles

Description: The development of commercially viable diesel engines that operate directly on pulverized coal-fuels will require solution to the problem of severe abrasive wear. The purpose of the work described in this report was to investigate the nature of the abrasive wear problem. Analytical studies were carried out to determine the characteristics of the coal-fuel and associated combustion particles responsible for abrasion. Laboratory pinon-disk wear tests were conducted on oil-particle mixtures to det… more
Date: September 1, 1992
Creator: Ives, L. K. (National Inst. of Standards and Technology, Gaithersburg, MD (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Commercialization of coal-fired diesel engines for cogeneration and non-utility power markets

Description: The primary objective of this METC project is to established practical, durable components compatible with clean coal slurry fuel and capable of low emissions. The components will be integrated into a coal power system for a 100-hr proof-of-concept test. The goal of this program is to advance the stationary coal-fueled diesel engine to the next plateau of technological readiness, and thus provide the springboard to commercialization.
Date: January 1, 1992
Creator: Wilson, R. P.; Rao, K.; Benedek, K. R.; Itse, D.; Parkinson, J.; Kimberley, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pelletizing/reslurrying as a means of distributing and firing clean coal

Description: Battelle-Columbus and Amax Research Development conducted a program to develop a process to transport, handle, store, and utilize ultra-fine, ultra-clean (UFUC) coals. The primary objective was to devise a cost-effective method, based on conventional pelletization techniques, to transform the sludge-like filter cake produced in advanced flotation cleaning processes into a product which could be used like lump coal. A secondary objective was the production of a pellet which could be readily conv… more
Date: September 29, 1992
Creator: Conkle, H. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development and testing of a commercial-scale coal-fired combustion system, Phase 3

Description: Within the commercial sector, oil and natural gas are the predominant fuels used to meet the space-heating needs of schools, office buildings, apartment complexes, and other similar structures. In general, these buildings require firing rates of 1 to 10 million Btu/hr. The objective of this program is to demonstrate the technical and economic viability of a coal-fired combustion system for this sector. The commercial-scale coal-water slurry (CWS)-fired space heating system will be a scale-up of… more
Date: January 1, 1992
Creator: Litka, A. F.; Breault, R. W. & Balsavich, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synthesis of octane enhancers during slurry-phase Fischer-Tropsch

Description: The objective of this project is to investigate three possible routes to the formation of ethers, in particular methyl tert-butyl ether (MTBE), during slurry phase Fischer-Tropsch reaction. The three reaction schemes to be investigated are: Addition of isobutylene during the formation of methanol and/or higher alcohols directly from CO and H{sub 2} during slurry-phase Fischer-Tropsch. Addition of isobutylene to FT liquid products including alcohols in a slurry-phase reactor containing an MTBE o… more
Date: June 10, 1992
Creator: Marcelin, G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Pelletizing/reslurrying as a means of distributing and firing clean coal

Description: Work in this quarter focused on completing (1) the final batch of pilot-scale disk pellets, (2) storage, handling, and transportation evaluation, (3) pellet reslurrying and atomization studies, and (4) cost estimation for pellet and slurry production. Disk pelletization of Elkhorn coal was completed this quarter. Pellets were approximately 1/2- to 3/4-in. in diameter. Pellets, after thermal curing were strong and durable and exceeded the pellet acceptance criteria. Storage and handling tests in… more
Date: June 9, 1992
Creator: Conkle, H. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

PETC fuel rheology laboratory

Description: This document summarizes the results of investigations into the rheological properties of alternate fuel mixtures, such as coal-oil mixtures, coal-water mixtures, and coal-alcohol mixtures. Primary emphasis in this paper is placed on the procedures and techniques used to evaluate alternate slurry fuels in the rheology laboratory at PETC through the spring of 1983. Sophisticated, bench-scale equipment was used to examine viscometric properties and to make settling velocity measurements. Examples… more
Date: August 1, 1984
Creator: Ekmann, A. C. & Ekmann, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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