caa a22 4500 463252705 CHVBK 20180405153345.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s10562-007-9054-4 doi (NATIONALLICENCE)springer-10.1007/s10562-007-9054-4 A comparative study of gas phase esterification on solid acid catalysts [Elektronische Daten] [Kaewta Suwannakarn, Edgar Lotero, James Goodwin Jr.] For the first time, a comprehensive comparison of the intrinsic activities of solid acid catalysts in terms of turnover frequency (TOF) is reported for the gas-phase esterification of acetic acid with methanol. The catalysts studied included a zeolite (Hβ), two modified zirconias (sulfated zirconia, SZ; and tungstated zirconia, WZ), and an acidic resin-silica composite (Nafion/silica, SAC-13). Activities on a per weight basis decreased in the following order: Hβ ∼ SAC-13 ≫ SZ > WZ at 130°C. However, on a rate-per-site basis (TOF), all catalysts showed comparable activities. The TOF results suggest that the acid sites of these catalysts have similar capacity for effectively catalyzing esterification. All catalysts deactivated to a quasi-steady-state rate with TOS. Regeneration experiments suggested that catalyst deactivation was due mainly to site blockage by carbonaceous deposits. Selective poisoning experiments showed that the reaction predominately took place on Brønsted acid sites. Springer Science+Business Media, LLC, 2007 esterification in the gas-phase nationallicence acetic acid nationallicence Methanol nationallicence Hβ zeolite nationallicence sulfated zirconia nationallicence tungstated zirconia nationallicence Nafion/silica composite nationallicence SAC-13 nationallicence Suwannakarn Kaewta Department of Chemical and Biomolecular Engineering, Clemson University, 29634, Clemson, SC, USA aut Lotero Edgar Department of Chemical and Biomolecular Engineering, Clemson University, 29634, Clemson, SC, USA aut Goodwin Jr. James Department of Chemical and Biomolecular Engineering, Clemson University, 29634, Clemson, SC, USA aut Catalysis Letters Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 114/3-4(2007-04-01), 122-128 1011-372X 114:3-4<122 2007 114 10562 https://doi.org/10.1007/s10562-007-9054-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-007-9054-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Suwannakarn Kaewta Department of Chemical and Biomolecular Engineering, Clemson University, 29634, Clemson, SC, USA aut NATIONALLICENCE 700 1- Lotero Edgar Department of Chemical and Biomolecular Engineering, Clemson University, 29634, Clemson, SC, USA aut NATIONALLICENCE 700 1- Goodwin Jr James Department of Chemical and Biomolecular Engineering, Clemson University, 29634, Clemson, SC, USA aut NATIONALLICENCE 773 0- Catalysis Letters Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 114/3-4(2007-04-01), 122-128 1011-372X 114:3-4<122 2007 114 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer