286 Matching Results

Search Results

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

Development of BEACON technology. Quarterly report, April-June 1982

Description: The BEACON process involves the catalytic deposition of a highly reactive form of carbon from a gas stream which contains carbon monoxide. The carbon-depleted gas is combusted with air to produce power, and the carbon is reacted with steam to produce methane or hydrogen. Experiments were continued this quarter with the objective of improving the carbon deposition efficiency using a Paraho retort off-gas mixture. Analysis has shown that the use of the Paraho off-gas to make hydrogen would be att… more
Date: March 1, 1983
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of improved iron Fischer-Tropsch catalysts

Description: The objective of proposed research is development of catalysts with enhanced slurry phase activity and better selectivity to fuel range products, through a more detailed understanding and systematic studies of the effects of pretreatment procedures and promoters/binders (silica) on catalyst performance.
Date: July 19, 1991
Creator: Bukur, D.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Binding and catalytic reduction of NO by transition metal aluminosilicates

Description: The objective of this research is to provide the scientific understanding of processes that actively and selectively reduce NO in dilute exhaust streams, as well as in concentrated streams, to N{sub 2}. Experimental studies of NO chemistry in transition metal-containing aluminosilicate catalysts are being carried out with the aim of determining the chemical rules for NO reduction on non-precious metals. The catalyst supports chosen for this investigation are A and Y zeolites, mordenite, and mon… more
Date: September 1, 1991
Creator: Klier, Kamil; Herman, Richard G. & Hou, Shaolie
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of improved iron Fischer-Tropsch catalysts

Description: The objective of proposed research is development of catalysts with enhanced slurry phase activity and better selectivity to fuel range products, through a more detailed understanding and systematic studies of the effects of pretreatment procedures and promoters/binders (silica) on catalyst performance.
Date: October 28, 1991
Creator: Bukur, D.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of improved iron Fischer-Tropsch catalysts

Description: The objective of proposed research is development of catalysts with enhanced slurry phase activity and better selectivity to fuel range products, through a more detailed understanding and systematic studies of the effects of pretreatment procedures and promoters/binders (silica) on catalyst performance.
Date: January 10, 1992
Creator: Bukur, D.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Probe molecule studies: Active species in alcohol synthesis

Description: The goal of this research is to develop a better understanding of the mechanisms of formation of alcohols and other oxygenates from syngas over supported catalysts. Different probe molecules are planned to add in situ during the reaction to help delineate reaction path ways and identify reaction intermediate species. The key of our study is to investigate how the species generated by these probe molecules interact with surface species present during oxygenate formation. CO hydrogenation reactio… more
Date: July 1, 1991
Creator: Blackmond, D.G. & Wender, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mixed Alcohol Synthesis Catalyst Screening 2007 Progress Report

Description: Pacific Northwest National Laboratory (PNNL) and National Renewable Energy Laboratory (NREL) are researching the feasibility of producing mixed alcohols from biomass-derived synthesis gas (syngas). PNNL is obtaining commercially available mixed alcohol or preparing promising mixed-alcohol catalysts and screening them in a laboratory-scale reactor system. The most promising catalysts are provided to NREL for testing using a slipstream from a pilot-scale biomass gasifier. After a review of the li… more
Date: November 1, 2007
Creator: Gerber, Mark A.; White, J. F.; Gray, Michel J. & Stevens, Don J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

SYNTHESIS AND CHARACTERIZATION OF CARBON AEROGEL NANOCOMPOSITES CONTAINING DOUBLE-WALLED CARBON NANOTUBES

Description: Carbon aerogels (CAs) are novel mesoporous materials with applications such as electrode materials for super capacitors and rechargeable batteries, adsorbents and advanced catalyst supports. To expand the potential application for these unique materials, recent efforts have focused on the design of CA composites with the goal of modifying the structure, conductivity or catalytic activity of the aerogel. Carbon nanotubes (CNTs) possess a number of intrinsic properties that make them promising ma… more
Date: March 11, 2008
Creator: Worsley, M A; Satcher, J H & Baumann, T F
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Conversion of Hydrogen Sulfide in Coal Gases to Liquid Elemental Sulfur with Monolithic Catalysts

Description: Removal of hydrogen sulfide (H{sub 2}S) from coal gasifier gas and sulfur recovery are key steps in the development of Department of Energy's (DOE's) advanced power plants that produce electric power and clean transportation fuels with coal and natural gas. These plants will require highly clean coal gas with H{sub 2}S below 1 ppmv and negligible amounts of trace contaminants such as hydrogen chloride, ammonia, alkali, heavy metals, and particulate. The conventional method of sulfur removal and… more
Date: September 30, 2007
Creator: Kwon, K. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preparation and evaluation of electrocatalysts for phosphoric-acid fuel cells. Final technical report, May 1, 1978-December 31, 1979

Description: The overall objective of this electrocatalysis program was to define the feasibility of lowering the electrocatalyst cost and to increase the electrocatalyst activity in phosphoric acid fuel cells to improve the commercial viability of fuel cells for producing electric power. Highly dispersed platinum was placed on carbon supports. These catalysts were characterized for both the platinum surface areas and crystallite sizes. For a given carbon impregnation technique with the noble metal salt, a … more
Date: January 1, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High-temperature fuel cell research and development. Final technical status report, June 1977-September 1978

Description: An initial survey of the literature produced a list of ceramic materials with properties which made them potential candidates for use in molten-carbonate fuel cell tiles or electrodes. Seven of the materials in the original list were dropped from consideration because of unfavorable thermodynamic properties; four materials were set aside because of high cost, lack of availability, or fabrication difficulties. Thirteen compositions were tested statically at 1000 K in a Li/sub 2/CO/sub 3/-K/sub 2… more
Date: October 15, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Investigation of Sulfur-Tolerant Catalysts for Selective Synthesis of Hydrocarbon Liquids From Coal-Derived Gases. Annual Technical Progress Report, September 19, 1980-September 18, 1981

Description: During the past contract year, considerable progress was made in characterization and activity/selectivity testing of iron and cobalt catalysts. Preparation of boride promoted cobalt and iron catalysts was refined and nearly completed. H/sub 2/ and CO adsorption and oxygen titration measurements were performed on a number of supported and unsupported catalysts, especially several boride promoted cobalt and iron catalysts. Activity/selectivity tests of 3 and 15% Fe/SiO/sub 2/ and Co/SiO/sub 2/ a… more
Date: October 31, 1981
Creator: Bartholomew, C. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Revolutionary systems for catalytic combustion and diesel catalytic particulate traps.

Description: This report is a summary of an LDRD project completed for the development of materials and structures conducive to advancing the state of the art for catalyst supports and diesel particulate traps. An ancillary development for bio-medical bone scaffolding was also realized. Traditionally, a low-pressure drop catalyst support, such as a ceramic honeycomb monolith, is used for catalytic reactions that require high flow rates of gases at high-temperatures. A drawback to the traditional honeycomb m… more
Date: December 1, 2004
Creator: Stuecker, John Nicholas; Witze, Peter O.; Ferrizz, Robert Matthew; Cesarano, Joseph, III & Miller, James Edward
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

LDRD final report on new homogeneous and supported oligomerization catalysts (LDRD 42461).

Description: The overall purpose of this LDRD is multifold. First, we are interested in preparing new homogeneous catalysts that can be used in the oligomerization of ethylene and in understanding commercially important systems better. Second, we are interested in attempting to support these new homogeneous catalysts in the pores of nano- or mesoporous materials in order to force new and unusual distributions of a-olefins to be formed during the oligomerization. Thus the overall purpose is to try to prepare… more
Date: November 1, 2004
Creator: Hascall, Anthony G. & Kemp, Richard Alan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Properties of supported metal catalysts. Progress report, April 1--June 30, 1979. [Al/sub 2/O/sub 3/-supported Pt]

Description: The preparation and characterization of supported platinum catalysts has been extended to a series of alumina-supported catalysts similar to the previously investigated platinum--silica series. Characterization has been carried out via hydrogen chemisorption, hydrogen--oxygen titration, hydrogenolysis of methylcyclopropane and deuterium exchange with cyclopentane. In all, some twenty catalysts, with platinum percentage exposed ranging from 4.1 to 103% have been prepared and characterized. As wa… more
Date: March 1, 1979
Creator: Burwell, Jr, R L; Butt, J B & Cohen, J B
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Applications of synchrotron radiation to Chemical Engineering Science: Workshop report

Description: This report contains extended abstracts that summarize presentations made at the Workshop on Applications of Synchrotron Radiation to Chemical Engineering Science held at Argonne National Laboratory (ANL), Argonne, IL, on April 22--23, 1991. The talks emphasized the application of techniques involving absorption fluorescence, diffraction, and reflection of synchrotron x-rays, with a focus on problems in applied chemistry and chemical engineering, as well as on the use of x-rays in topographic, … more
Date: July 1, 1991
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Model catalytic oxidation studies using supported monometallic and heterobimetallic oxides

Description: This research program is directed toward a more fundamental understanding of the effects of catalyst composition and structure on the catalytic properties of metal oxides. Metal oxide catalysts play an important role in many reactions bearing on the chemical aspects of energy processes. Metal oxides are the catalysts for water-gas shift reactions, methanol and higher alcohol synthesis, isosynthesis, selective catalytic reduction of nitric oxides, and oxidation of hydrocarbons. A key limitation … more
Date: February 3, 1992
Creator: Ekerdt, J. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A facility for using cluster research to study environmental problems

Description: This report begins by describing the general application of cluster based research to environmental chemistry and the development of a Cluster Structure and Dynamics Research Facility (CSDRF). Next, four important areas of cluster research are described in more detail, including how they can impact environmental problems. These are: surface-supported clusters, water and contaminant interactions, time-resolved dynamic studies in clusters, and cluster structures and reactions. These facilities an… more
Date: November 1, 1991
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Preparation and evaluation of advanced electro-catalysts for phosphoric acid fuel cells. Eighth quarterly report, October-December 1981. [Platinum]

Description: In the development of new and highly efficient porous electrocatalysts, two cooperative phenomena are required. The first is an increase in the electrocatalytic activity of the catalyst particle, and the second is the availability of that electrocatalyst particle for the electrochemical reaction. These two processes interact with each other in such a way that improvements in the electrochemical activity must be coupled with improvements in the availability of the electrocatalyst for reaction. S… more
Date: December 31, 1981
Creator: Stonehart, P.; Baris, J.; Hochmuth, J. & Pagliaro, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Support effects studied on model supported catalysts

Description: We are studying model catalysts in which the active phase is deposited onto flat oxide substrates in order to understand how a catalyst is affected by its support. We have examined the following growth and stability of titania overlayers which had been vapor deposited onto a Rh foil; the growth of Pt films on ZnO(0001)Zn and O(0001)O and compared the results to those obtained for Pt on {alpha}-Al{sub 2}O{sub 3}(0001). Samples were prepared by vapor deposition of Pt onto flat substrates in ultra… more
Date: November 1, 1991
Creator: Gorte, R.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chemical interactions in multimetal/zeolite catalysts

Description: For Pt/NaY catalysts our analysis of the mechanism of metal particle formation has enabled us to produce at will samples which contain either the majority of the Pt particles in supercages, without filling these cages completely, or the Pt particles bulge into neighboring cages. The catalytic selectivity is distinctly different for these preparations, in the former case molecules can enter a supercage which is partially filled by the Pt cluster, in the second case adsorption takes place through… more
Date: February 7, 1992
Creator: Sachtler, W.M.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Improved Fischer-Tropsch catalysts for indirect coal liquefaction

Description: The Fischer-Tropsch synthesis (FTS)reaction is the established technology for the production of liquid fuels from coal by an indirect route using coal-derived syngas (CO + H{sub 2}). Modern FTS catalysts are potassium- and copper-promoted iron preparations. These catalysts exhibit moderate activity with carbon monoxide-rich feedstocks such as the syngas produced by advanced coal gasification processes. However, the relatively large yields of by-product methane and high-molecular-weight hydrocar… more
Date: February 1, 1989
Creator: Wilson, R. B., Jr.; Tong, G. T.; Chan, Y. W.; Huang, H. W. & McCarty, J. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thin film battery/fuel cell power generating system. Final report, Task E-4, April 1976-April 1978

Description: A two-year researth program to design and demonstrate the technical feasibility of a high-temperature solid-electrolyte fuel cell is described in detail. A rare-earth chromite, in particular, La /sub 95/Mg /sub 05/Cr /sub 75/Al /sub 25/0/sub 3/ was identified, synthesized by RF-sputtering tested for resistivity, thermal expansion and inertness in contact with yttria-stabilized zirconia, and was found promising as a candidate interconnection material. Films of these interconnection materials hav… more
Date: March 31, 1978
Creator: Feduska, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Direct conversion of methane to C sub 2 's and liquid fuels

Description: The objectives of the project are to discover and evaluate novel catalytic systems for the conversion of methane or by-product light hydrocarbon gases either indirectly (through intermediate light gases rich in C{sub 2}'s) or directly to liquid hydrocarbon fuels, and to evaluate, from an engineering perspective, different conceptualized schemes. The approach is to carry out catalyst testing on several specific classes of potential catalysts for the conversion of methane selectively to C{sub 2} … more
Date: March 12, 1990
Creator: Warren, B. K.; Campbell, K. D.; Matherne, J. L. & Kinkade, N. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen