Isobutanol-methanol mixtures from synthesis gas. Quarterly technical progress report, October 1, 1996--December 30, 1996

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A series of MgO-based Cu catalysts have been prepared by coprecipitating the corresponding metal nitrates with a mixed solution of potassium carbonate and potassium hydroxide. The bulk composition of the catalyst has been measured by atomic absorption (AA) analysis and the Cu dispersion has been determined by N{sub 2}O titration at 363 K. Kinetic studies of ethanol coupling reactions on Cu{sub 0.5}Mg{sub 5}CeO{sub x} and 1.0 wt % K-Cu{sub 0.5}Mg{sub 5}CeO{sub x} catalyst indicates that at similar steady-state acetaldehyde concentrations, the presence of K increases the rates of base-catalyzed aldol coupling reactions to acetone and butyraldehyde. Aldol coupling chain growth ... continued below

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40 p.

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Creator: Unknown. March 1, 1997.

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A series of MgO-based Cu catalysts have been prepared by coprecipitating the corresponding metal nitrates with a mixed solution of potassium carbonate and potassium hydroxide. The bulk composition of the catalyst has been measured by atomic absorption (AA) analysis and the Cu dispersion has been determined by N{sub 2}O titration at 363 K. Kinetic studies of ethanol coupling reactions on Cu{sub 0.5}Mg{sub 5}CeO{sub x} and 1.0 wt % K-Cu{sub 0.5}Mg{sub 5}CeO{sub x} catalyst indicates that at similar steady-state acetaldehyde concentrations, the presence of K increases the rates of base-catalyzed aldol coupling reactions to acetone and butyraldehyde. Aldol coupling chain growth reaction rates on 1.2 wt % K-Cu{sub 7.5}Mg{sub 5}CeO{sub x} are higher than on 1.0 wt % K-Cu{sub 0.5}Mg{sub 5}CeO{sub x} even though basic site densities are similar on both samples, suggesting that Cu metal sites are also involved in rate-determining steps required for condensation reactions. Cu appears to enhance the desorption of H{sub 2} via the migration of H species from basic to Cu sites and makes the basic sites available for subsequent C-H bond activation steps. Addition of CO{sub 2} decreases the rate of base-catalyzed chain growth reaction to acetone, but does not affect the rate of ethanol dehydrogenation reaction on Cu metal sites

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40 p.

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OSTI as DE98004748

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  • Other Information: PBD: 1 Mar 1997

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  • Other: DE98004748
  • Report No.: DOE/PC/94066--T9
  • Grant Number: AC22-94PC94066
  • DOI: 10.2172/589252 | External Link
  • Office of Scientific & Technical Information Report Number: 589252
  • Archival Resource Key: ark:/67531/metadc691604

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  • March 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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Isobutanol-methanol mixtures from synthesis gas. Quarterly technical progress report, October 1, 1996--December 30, 1996, report, March 1, 1997; California. (digital.library.unt.edu/ark:/67531/metadc691604/: accessed December 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.