Aqueous-phase catalytic hydrogenation of organic acids and their mixtures

    Research output: ResearchConference contribution

    Abstract

    Biomass-based organic acids are attractive feedstocks for chemicals production because they are available in quantity and can undergo a variety of reactions to form useful products. The Ru/C-catalyzed hydrogenation reactions of lactic acid and propionic acid in aqueous solution were performed in a laboratory-scale stirred batch reactor. Kinetic data were collected at 343-423 K, hydrogen pressure (3.4-10.3 MPa) and acid feed concentration (0.05-5 M). The adsorption and reduction of individual acids, acid mixtures, and combinations of acids with their alcohol products on fully reduced catalyst were studied. The acid conversion rates were not limited by mass-transport resistances over the reaction conditions studied. A Langmuir-Hinshelwood kinetic model was presented in which lactic acid and propionic acid compete for one type of surface catalytic site and hydrogen dissociatively adsorbs on a second type of site. The research provides insight into the catalytic reaction mechanism and forms the basis for further investigation of the organic acids hydrogenation. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 10/30/2005-11/4/2005).

    LanguageEnglish (US)
    Title of host publicationAIChE Annual Meeting Conference Proceedings
    PublisherAmerican Institute of Chemical Engineers
    Volume2005
    ISBN (Print)0816909962, 9780816909964
    StatePublished - 2005
    Event05AIChE: 2005 AIChE Annual Meeting and Fall Showcase - Cincinnati, OH, United States
    Duration: Oct 30 2005Nov 4 2005

    Other

    Other05AIChE: 2005 AIChE Annual Meeting and Fall Showcase
    CountryUnited States
    CityCincinnati, OH
    Period10/30/0511/4/05

    Profile

    Organic acids
    Hydrogenation
    Acids
    Propionic acid
    Lactic acid
    Hydrogen
    Kinetics
    Batch reactors
    Feedstocks
    Biomass
    Alcohols
    Mass transfer
    Adsorption
    Catalysts

    ASJC Scopus subject areas

    • Energy(all)

    Cite this

    Chen, Y., Miller, D. J., & Jackson, J. E. (2005). Aqueous-phase catalytic hydrogenation of organic acids and their mixtures. In AIChE Annual Meeting Conference Proceedings (Vol. 2005). American Institute of Chemical Engineers.

    Aqueous-phase catalytic hydrogenation of organic acids and their mixtures. / Chen, Yuqing; Miller, Dennis J.; Jackson, James E.

    AIChE Annual Meeting Conference Proceedings. Vol. 2005 American Institute of Chemical Engineers, 2005.

    Research output: ResearchConference contribution

    Chen, Y, Miller, DJ & Jackson, JE 2005, Aqueous-phase catalytic hydrogenation of organic acids and their mixtures. in AIChE Annual Meeting Conference Proceedings. vol. 2005, American Institute of Chemical Engineers, 05AIChE: 2005 AIChE Annual Meeting and Fall Showcase, Cincinnati, OH, United States, 10/30/05.
    Chen Y, Miller DJ, Jackson JE. Aqueous-phase catalytic hydrogenation of organic acids and their mixtures. In AIChE Annual Meeting Conference Proceedings. Vol. 2005. American Institute of Chemical Engineers. 2005.
    Chen, Yuqing ; Miller, Dennis J. ; Jackson, James E./ Aqueous-phase catalytic hydrogenation of organic acids and their mixtures. AIChE Annual Meeting Conference Proceedings. Vol. 2005 American Institute of Chemical Engineers, 2005.
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    N2 - Biomass-based organic acids are attractive feedstocks for chemicals production because they are available in quantity and can undergo a variety of reactions to form useful products. The Ru/C-catalyzed hydrogenation reactions of lactic acid and propionic acid in aqueous solution were performed in a laboratory-scale stirred batch reactor. Kinetic data were collected at 343-423 K, hydrogen pressure (3.4-10.3 MPa) and acid feed concentration (0.05-5 M). The adsorption and reduction of individual acids, acid mixtures, and combinations of acids with their alcohol products on fully reduced catalyst were studied. The acid conversion rates were not limited by mass-transport resistances over the reaction conditions studied. A Langmuir-Hinshelwood kinetic model was presented in which lactic acid and propionic acid compete for one type of surface catalytic site and hydrogen dissociatively adsorbs on a second type of site. The research provides insight into the catalytic reaction mechanism and forms the basis for further investigation of the organic acids hydrogenation. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 10/30/2005-11/4/2005).

    AB - Biomass-based organic acids are attractive feedstocks for chemicals production because they are available in quantity and can undergo a variety of reactions to form useful products. The Ru/C-catalyzed hydrogenation reactions of lactic acid and propionic acid in aqueous solution were performed in a laboratory-scale stirred batch reactor. Kinetic data were collected at 343-423 K, hydrogen pressure (3.4-10.3 MPa) and acid feed concentration (0.05-5 M). The adsorption and reduction of individual acids, acid mixtures, and combinations of acids with their alcohol products on fully reduced catalyst were studied. The acid conversion rates were not limited by mass-transport resistances over the reaction conditions studied. A Langmuir-Hinshelwood kinetic model was presented in which lactic acid and propionic acid compete for one type of surface catalytic site and hydrogen dissociatively adsorbs on a second type of site. The research provides insight into the catalytic reaction mechanism and forms the basis for further investigation of the organic acids hydrogenation. This is an abstract of a paper presented at the AIChE Annual Meeting and Fall Showcase (Cincinnati, OH 10/30/2005-11/4/2005).

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