caa a22 4500 475843673 CHVBK 20180406123907.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1023/A:1027252015190 doi (NATIONALLICENCE)springer-10.1023/A:1027252015190 The role of protons in acid-base type reactions on heteropolyacid catalysts: gas-phase MTBE synthesis on H4SiW12O40 [Elektronische Daten] [A. Bielański, A. Małecka-Lubańska, A. Micek-Ilnicka, J. Poźniczek] Basing on the kinetic and sorption experiments a mechanism of catalytic formation of methyl-tert-butyl ether (MTBE) on H4SiW12O40 was proposed. A reaction intermediate, carbenium ion C4H 9 + , is forming at the catalyst surface from isobutene supplied from gas phase and protons supplied by the solid. Subsequently C4H 9 + reacts with methanol absorbed by the solid heteropolyacid. The model satisfactorily explains the anomalous reaction order with respect to methanol which under the applied conditions is positive at the initial stage of the catalytic process and becomes negative at its steady state. Kluwer Academic Publishers, 2000 MTBE synthesis nationallicence heteropolyacid nationallicence protons nationallicence sorption nationallicence Bielański A. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 1, 30-239, Kraków, Poland aut Małecka-Lubańska A. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 1, 30-239, Kraków, Poland aut Micek-Ilnicka A. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 1, 30-239, Kraków, Poland aut Poźniczek J. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 1, 30-239, Kraków, Poland aut Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 11-12/1-4(2000-04-01), 43-53 1022-5528 11-12:1-4<43 2000 11-12 11244 https://doi.org/10.1023/A:1027252015190 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1027252015190 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Bielański A. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 1, 30-239, Kraków, Poland aut NATIONALLICENCE 700 1- Małecka-Lubańska A. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 1, 30-239, Kraków, Poland aut NATIONALLICENCE 700 1- Micek-Ilnicka A. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 1, 30-239, Kraków, Poland aut NATIONALLICENCE 700 1- Poźniczek J. Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, ul. Niezapominajek 1, 30-239, Kraków, Poland aut NATIONALLICENCE 773 0- Topics in Catalysis Kluwer Academic Publishers-Plenum Publishers 11-12/1-4(2000-04-01), 43-53 1022-5528 11-12:1-4<43 2000 11-12 11244 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer