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High temperature ceramic membrane reactors for coal liquid upgrading

Description: In this project we will study a novel process concept, i.e., the use of ceramic membrane reactors in upgrading of coal model compounds and coal derived liquids. In general terms, the USC research team is responsible for constructing and operating the membrane reactor apparatus and for testing various inorganic membranes for the upgrading of coal derived asphaltenes and coal model compounds. The USC effort will involve the principal investigator of this project and two graduate research assistan… more
Date: January 1, 1992
Creator: Tsotsis, T.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Process and analytical studies of enhanced low severity co-processing using selective coal pretreatment

Description: This report describes progress on research during the eleventh quarter of this contract dealing with applications of coal pretreatment techniques in coal/oil co-processing and direct hydroliquefaction. The objectives of the project are to investigate various coal pretreatment techniques and to determine the effect of these pretreatment procedures on the reactivity of the coal. Reactivity enhancement will be evaluated under both direct hydroliquefaction and co-processing conditions. Coal convers… more
Date: 1991-06~
Creator: Baldwin, R. M.; Gaur, S. & Miller, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Particulate behavior in a controlled-profile pulverized coal-fired reactor: A study of coupled turbulent particle dispersion and thermal radiation transport

Description: This report describes recent progress in a fundamental, three-year investigation of the coupled problem of turbulent particle dispersion and thermal radiation transport. The project's objective is to make measurements of particle size, velocity, number density, temperature and wall radiant heat flux in a parametrically-controlled reactor presently existent at Brigham Young University (BYU). Although the study proposed here is primarily designed to provide experimental data not currently availab… more
Date: January 1, 1992
Creator: Queiroz, M. & Webb, B.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The development of an integrated multistage fluid bed retorting process. [KENTORT II process--50-lb/hr]

Description: This report summarizes the progress made on the development of an integrated multistage fluidized bed retorting process (KENTORT II). The KENTORT II process includes integral fluidized bed zone for pyrolysis, gasification, and combustion of the oil shale. The purpose of this program is to design and test the KENTORT II process at the 50-lb/hr scale. The work performed during this year involved projects that will contribute physical and chemical data for the final design of the 50-lb/hr retort. … more
Date: January 1, 1992
Creator: Carter, S.; Vego, A.; Taulbee, D. & Stehn, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The development of precipitated iron catalysts with improved stability

Description: The objective of this program is to identify the chemical principles governing the deactivation of precipitated iron catalysts during Fischer-Tropsch synthesis and to use these chemical principles in the design of catalysts suitable for slurry reactors. The performance targets are 88% CO+H{sub 2} conversion with less than 1% deactivation/day for 1 month and a methane and ethane selectivity of no more than 7% (based on hydrocarbons and oxygenates only) at a space velocity of at least 2 normal li… more
Date: May 6, 1992
Creator: Abrevaya, H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High temperature ceramic membrane reactors for coal liquid upgrading

Description: In this project we well evaluate the performance of Sel-Gel alumina membranes in coal liquid upgrading processes under realistic temperature and pressure conditions and investigate the feasibility of using such membranes in a membrane reactor based coal liquid upgrading process. In addition, the development of novel ceramic membranes with enhanced catalytic activity for coal-liquid upgrading applications, such as carbon-coated alumina membranes, will be also investigated. (VC)
Date: June 19, 1992
Creator: Tsotsis, T.T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The production of fuels and chemicals from food processing wastes using a novel fermenter separator

Description: During 1991, considerable progress was made on the waste utilization project. Two small Wisconsin companies have expressed an interest in promoting and developing the ICRS technology. Pilot plant sites at (1) Hopkinton, IA, for a sweet whey plant, and Beaver Dam WI, for an acid whey site have been under development siting ICRS operations. The Hopkinton, IA site is owned and operated by Permeate Refining Inc., who have built a batch ethanol plant across the street from Swiss Valley Farms cheddar… more
Date: December 1, 1991
Creator: Dale, M.C.; Venkatesh, K.V.; Choi, Hojoon; Moelhman, M.; Saliceti, L.; Okos, M.R. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High temperature catalytic membrane reactors

Description: Current state-of-the-art inorganic oxide membranes offer the potential of being modified to yield catalytic properties. The resulting modules may be configured to simultaneously induce catalytic reactions with product concentration and separation in a single processing step. Processes utilizing such catalytically active membrane reactors have the potential for dramatically increasing yield reactions which are currently limited by either thermodynamic equilibria, product inhibition, or kinetic s… more
Date: March 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Packed bed reactor treatment of liquid hazardous and mixed wastes

Description: We are developing thermal-based packed bed reactor (PBR) technology as an alternative to incineration for treatment of hazardous organic liquid wastes. The waste streams targeted by this technology are machining fluids contaminated with chlorocarbons and/or chlorofluorocarbons and low levels of plutonium or tritium The PBR offers several distinct advantages including simplistic design, rugged construction, ambient pressure processing, economical operations, as well as ease of scalability and ma… more
Date: January 1, 1992
Creator: Tennant, R.A.; Wantuck, P.J. & Vargas, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Research on the pyrolysis of hardwood in an entrained bed process development unit

Description: An atmospheric flash pyrolysis process, the Georgia Tech Entrained Flow Pyrolysis Process, for the production of liquid biofuels from oak hardwood is described. The development of the process began with bench-scale studies and a conceptual design in the 1978--1981 timeframe. Its development and successful demonstration through research on the pyrolysis of hardwood in an entrained bed process development unit (PDU), in the period of 1982--1989, is presented. Oil yields (dry basis) up to 60% were… more
Date: August 1, 1991
Creator: Kovac, R. J.; Gorton, C. W.; Knight, J. A.; Newman, C. J. & O'Neil, D. J. (Georgia Inst. of Tech., Atlanta, GA (United States). Research Inst.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Full-Scale Demonstration Low-NOx Cell Burner retrofit

Description: The overall objective of the Full-Scale Low-NOx Cell (LNC) Burner Retrofit project is to demonstrate the cost-effective reduction of NOx generated by a large, base-loaded (70% capacity factor or greater), coal-fired utility boiler. Specific objectives include: at least 50% NOx reduction over standard two-nozzle cell burners, without degradation of boiler performance or life; acquire and evaluate emission and boiler performance data before and after the retrofit to determine NOx reduction and im… more
Date: May 24, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Liquid Phase Methanol LaPorte Process Development Unit: Modification Operation, and Support Studies

Description: In April 1987, Air Products started the third and final contract with the US Department of Energy to develop the Liquid Phase Methanol (LPMEOH) process. One of the objectives was to identify alternative commercial catalyst(s) for the process. This objective was strategically important as we want to demonstrate that the LPMEOH process is flexible and not catalyst selection limited. Among three commercially available catalysts evaluated in the lab, the catalyst with a designation of F21/0E75-43 w… more
Date: January 28, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Liquid Phase Methanol LaPorte Process Development Unit: Modification, Operation, and Support Studies

Description: The LPMEOH process was conceived and patented by Chem Systems Inc. in 1975. Initial research and studies on the process focused on two distinct modes of operation. The first was a liquid fluidized mode with relatively large catalyst pellets suspended in a fluidizing liquid, and the second was an entrained (slurry) mode with fine catalyst particles slurried in an inert liquid. The development of both operating modes progressed in parallel from bench scale reactors, through an intermediate scale … more
Date: February 28, 1991
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: 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

A Novel Coal Feeder for Production of Low Sulfur Fuel

Description: A dual-screw feeder was designed and tested for desulfurization of coal. The key parts of this reactor are two screw tubes which independently feed coal and calcined lime, the inner tube acting as a coal pyrolizer and the outer tube acting as a desulfurizer with hot calcined lime pellets or other renewable sorbent pellets. The objective of this project is to study the feasibility of this advanced concept of desulfurization using the coal feeder. In this quarter, the following tasks have been pe… more
Date: January 1, 1992
Creator: Khang, S. J.; Keener, T. & Lin, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Synergistic capture mechanisms for alkali and sulfur species from combustion

Description: An aerosol reactor system has been designed and constructed for the systematic study of the mechanisms governing the possible synergistic capture of sulfur oxide and alkalis with aluminosilicates and lime (CaO). Actual particle dynamics found in coal combustor systems can be simulated, mass balances can be closed, and the system conditions are well controlled. The collection of hot reactive aerosol flows is performed utilizing an isokinetic probe.
Date: January 10, 1992
Creator: Peterson, T.W.; Shadman, F.; Wendt, J.O.L. & Olsen, E.
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: This report presents the results of fundamental mass transfer testing for in-duct removal of SO{sub 2}. Following this initial part of an experimental program, it became clear that the amount of initial moisture on the sorbent strongly affected the extent of Ca(OH){sub 2} conversion. Novel techniques aimed at increasing sorbent utilization were investigated and are described. Major novel technique investigated and reported on here was the reaction with SO{sub 2} of sorbents with initial free mo… 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
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Pyrite thermochemistry, ash agglomeration, and char fragmentation during pulverized coal combustion

Description: The objective of the present work is to introduce an experimental program that will eventually lead to time-resolved iron ash composition over the technological operating domain. The preceding literature survey suggests two important stipulations on any such experimental program. The first stipulation is that good control must be established over the operating conditions, to accurately quantify their effects. The other is that data must be obtained rapidly, to thoroughly cover the important ope… more
Date: October 1, 1991
Creator: Akan-Etuk, A.; Diaz, R. & Niksa, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fundamental quantitative analysis of microbial activity in aquifer bioreclamation

Description: Research continued on aquifer bioreclamation. The project has four primary areas: (1) biodegradation of poorly soluble organic contaminants, (2) dual-limitation kinetics of electron donors and acceptors, (3) two-dimensional modeling of biofilm reactions in nonhomogeneous porous media, and (4) biologically induced clogging in porous media. For each area, this report gives a brief summary of the first year's progress, report this quarter's progress in detail, and indicate plans for future work. 2… more
Date: January 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A novel coal feeder for production of low sulfur fuel

Description: In this project, a dual-screw feeder was designed for desulfurization of coal. The key parts of this reactor are two screw tubes which are used to feed coal and calcined lime particles separately, the inner tube acting as a coal pyrolyzer and the outer tube acting as a desulfurizer with hot calcined lime pellets or other renewable sorbent pellets. The objective of this project is to study the feasibility of an advanced concept of desulfurization in the coal feeder. (VC)
Date: January 1, 1991
Creator: Lin, L.; Khang, S. J. & Keener, T. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The application of time-resolved luminescence spectroscopy to a remote uranyl sensor

Description: Time resolved luminescence spectroscopy is an effective method for the determination of a wide range of uranyl concentrations in aqueous samples. We have applied this technique to the development of a remote sensing device using fiber optic cables coupled with a micro flow cell in order to probe for uranyl in aqueous samples. This sensor incorporates a Nafion membrane through which UO{sub 2}{sup 2+} can diffuse in to a reaction/analysis chamber which holds phosphoric acid, a reagent which enhan… more
Date: January 1, 1991
Creator: Varineau, P. T.; Duesing, R. & Wangen, L. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Market enhancement of shale oil: The native products extraction technology

Description: The overall objective of this work was to assess the feasibility of enhancing shale oil commercialization through SO/NPX technology. Specific objectives were: (1) To determine the properties and characteristics of fractions isolable from shale oil utilizing separation sequences which are based on thermodynamic considerations; (2) To identify product streams of market value for promising technology development; (3)To conduct technology development studies leading to a shale oil extraction and pr… more
Date: October 1, 1991
Creator: Bunger, J.W. (Bunger (James W.) and Associates, Inc., Salt Lake City, UT (United States)) & DuBow, J.B. (Utah Univ., Salt Lake City, UT (United States))
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design of generic coal conversion facilities: Process release---Refining and upgrading

Description: The refinery and upgrade process development unit (PDU) is designed to upgrade liquid hydrocarbon products from the direct and indirect liquefaction PDU's to transportation fuels. The refinery will comprise of the following reactor systems: (a) Hydrotreating (b) Hydrocracking (c) Reforming. The three reactor systems will share common feed preparation, product separation and fractionation sections. The refinery is being designed to operate independently of the other PDU's. The use of common feed… more
Date: September 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design of generic coal conversion facilities: Production of oxygenates from synthesis gas---A technology review

Description: This report concentrates on the production of oxygenates from coal via gasification and indirect liquefaction. At the present the majority of oxygenate synthesis programs are at laboratory scale. Exceptions include commercial and demonstration scale plants for methanol and higher alcohols production, and ethers such as MTBE. Research and development work has concentrated on elucidating the fundamental transport and kinetic limitations governing various reactor configurations. But of equal or gr… more
Date: October 1, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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