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Studies Of Supported Metal Catalysts Progress Report September 1 1980 August 31 1981
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Book Synopsis Studies of Supported Metal Catalysts. Progress Report, September 1, 1980-August 31, 1981 by :
Download or read book Studies of Supported Metal Catalysts. Progress Report, September 1, 1980-August 31, 1981 written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: During this period research has been carried out on five separate catalyst systems. The effect of zinc ions on the interaction between cobalt and .gamma.-Al/sub 2/O/sub 3/ has been studied. Work on the oxidic Mo/Al/sub 2/O/sub 3/ system has been published and studies have been extended to the sulfided catalysts. The first phase of work on the Co/Mo/Al/sub 2/O/sub 3/ system has been completed. Work on W/Al/sub 2/O/sub 3/ catalysts has begun and the oxidic system has been studied in some detail. Work continues on metal-support interactions in supported nickel catalysts. An electron spectroscopy (ESCA) study has been completed and work is continuing on correlation of the ESCA results with measurements like temperature programmed desorption (TPD) and temperature programmed reduction (TPRd).
Book Synopsis Studies of Supported Metal Catalysts. Progress Report, September 1, 1979-August 31, 1980 by :
Download or read book Studies of Supported Metal Catalysts. Progress Report, September 1, 1979-August 31, 1980 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Research was carried out on four separate catalyst systems: Co-Al/sub 2/O/sub 3/; Mo-Al/sub 2/O/sub 3/; Co/Mo/Al/sub 2/O/sub 3/; and Ni. Work was completed on the interactions between cobalt and .gamma.-Al/sub 2/O/sub 3/. Work was begun on the combined Co/Mo/Al/sub 2/O/sub 3/ system. A separate study is in progress on support interactions between nickel and a variety of supports; particular emphasis has been on the effect of preparation method.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1985 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1983 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Download or read book Fossil Energy Update written by and published by . This book was released on 1981 with total page 886 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index: Keyword A-L by :
Download or read book Government Reports Annual Index: Keyword A-L written by and published by . This book was released on 1987 with total page 1060 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1981 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1984-03 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Properties of Supported Metal Catalysts. Progress Report, 1 Apr 1980-1 March 1981 by :
Download or read book Properties of Supported Metal Catalysts. Progress Report, 1 Apr 1980-1 March 1981 written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The set of Pd/SiO2 catalysts described in Report COO-4254-3 has been further characterized by in-situ, controlled atmosphere x-ray diffraction studies. In-situ reaction studies have also been conducted for methylcyclopropane hydrogenolysis and the formation of palladium hydride has been detected for the first time during a catalytic reaction. Isotopic exchange between cyclopentane and deuterium has been investigated for the series. This reaction is structure sensitive with the turnover number increasing monotonically with percentage metal exposed. Selectivity for exchange is also structure sensitive, with the ratio of d10/d5 steadily declining with increasing percentage exposed. Similar behavior has been found for the hydrogenation of propylene, although the patterns of structure sensitivity differ. The mean square amplitude of vibration of the Pt atoms (measured with x-rays) has been obtained in situ in different gas environments; it has been found to increase with increasing temperature of H2 reduction during pretreatment. For low percent Pt exposed in these catalysts, it was found that Pt changes form with increasing temperature of hydrogen reduction during pretreatment. The volume fraction determined from the area of the diffraction peak decreases appreciably. An examination of the Pt fluourescent x-rays however, shows that the Pt is still present.
Book Synopsis Interference Problems on Wing-fuselage Combinations in Inviscid, Incompressible Flow by : Aeronautical Research Council (Great Britain)
Download or read book Interference Problems on Wing-fuselage Combinations in Inviscid, Incompressible Flow written by Aeronautical Research Council (Great Britain) and published by . This book was released on 1974 with total page 1212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book INIS Atomindex written by and published by . This book was released on 1983 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Environmental Pollution & Control by :
Download or read book Environmental Pollution & Control written by and published by . This book was released on 1982 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy written by and published by . This book was released on 1983 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).
Book Synopsis Investigation of Dispersed Iron Alloy Catalysts in the Carbon Monoxide-hydrogen Synthesis Reaction. Progress Report, August 1, 1980-July 31, 1981 by :
Download or read book Investigation of Dispersed Iron Alloy Catalysts in the Carbon Monoxide-hydrogen Synthesis Reaction. Progress Report, August 1, 1980-July 31, 1981 written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The past year has seen completion of two major tasks in the research program: (1) a detailed study of the characterization of particle size in supported .cap alpha.-Fe2O3 and related characterizations of the reduced metal with silica gel support; (2) a reaction study of a series of silica supported Fe-Ni, Fe-Co, Fe-Cu, Fe-K and the corresponding pure metals. Synthesis activity and selectivity were particular objectives of this work, and a particular correlation of the conversion dependence of selectivity and water-gas shift activity was observed. We feel this to be an important finding: the catalysts which are good water-gas shift catalysts are the ones which are inhibited during the synthesis. A mechanism of product inhibition by water formation has been proposed to explain the conversion dependence of selectivity.
Book Synopsis Support Effects Studied on Model Supported Catalysts. Progress Report, April 1, 1991--March 31, 1992 by :
Download or read book Support Effects Studied on Model Supported Catalysts. Progress Report, April 1, 1991--March 31, 1992 written by and published by . This book was released on 1991 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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?-Al2O3(0001). Samples were prepared by vapor deposition of Pt onto flat substrates in ultra high vacuum, and metal coverages were measured using a quartz-crystal, film thickness monitor; the structure and CO adsorption properties of Pt films vapor deposited onto a ZrO2(100) crystal; the deposition of Rh on a ZrO2(100) crystal; The absorption of NO on Pt particles supported on CeO2,?-Al2O3(0001), and the Zn- and O-polar surfaces of ZnO(0001). We have investigated supported oxides in order to understand the acidic properties that have been reported for monolayer oxides. Our first studies were of amorphous, silicalumina catalysts. Finally, we have also begun to prepare model supported oxides in order to be able to used spectroscopic methods to characterize the sites formed on these materials. Our first studies were of niobia deposition on oxidized Al films and on an?-Al2O3(0001) crystal.
Book Synopsis Polymer-based Catalysts. Progress Report, July 1, 1980-June 30, 1981 by :
Download or read book Polymer-based Catalysts. Progress Report, July 1, 1980-June 30, 1981 written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Research carried out under this contract period has centered around the following: (1) developing methods for probing active site mobility, macroenvironment, microenvironment and efficiency of triphase catalysts, (2) preparing and evaluating a variety of polyether-based triphase catalysts, (3) synthesizing key monomers from which sequestered ligands are to be prepared, and (4) demonstrating the synthetic utility of simple poly(acrylamide) gels as solid phase cosolvents.
Book Synopsis Properties of Supported Metal Catalysts. Progress Report, April 1--June 30, 1979. [Al2O3-supported Pt]. by :
Download or read book Properties of Supported Metal Catalysts. Progress Report, April 1--June 30, 1979. [Al2O3-supported Pt]. written by and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 was the case for the silica supported platinum, the specific conditions of catalyst pretreatment have been found to affect substantially the structure sensitive behavior in all cases. In addition, the thermal conditions employed in catalyst preparation affect the nature of structure sensitive behavior, which was not the case for Pt/SiO2. Substantial effort has been devoted to the development of a suitable system for making x-ray measurements in controlled atmospheres. Several of the Pt/SiO2 catalysts have been investigated in hydrogen atmospheres, with the curious result that the apparent loading of metal detected in hydrogen is lower than that determined in air (which agreed with the value determined in preparation).
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