caa a22 4500 46325256X CHVBK 20180405153344.0 cr unu---uuuuu 170326e20070101xx s 000 0 eng 10.1007/s10562-006-9005-5 doi (NATIONALLICENCE)springer-10.1007/s10562-006-9005-5 Influence of calcination procedure on the catalytic property of sulfated zirconia [Elektronische Daten] [Xuebing Li, Katsutoshi Nagaoka, Laurent Simon, Roberta Olindo, Johannes Lercher] Calcination parameters, such as atmosphere, duration and catalyst bed depth have a marked influence on the catalytic and spectroscopic properties of sulfated zirconia. Sulfated zirconia calcined in nitrogen or synthetic airflow, in deep bed, exhibited comparable activity in n-butane isomerization at 373K, which suggests that oxygen is not necessary for formation of active sites. Catalysts calcined in shallow bed are catalytically inactive. Thus, the bed depth is concluded to be crucial for the formation of active sites. The samples calcined in shallow bed possessed lower sulfate content and the S=O stretching vibration was located at lower frequency. Calcination in the presence of water vapor also led to lower catalytic activity, sulfate content, and BET area. Extended calcination reduced gradually the activity and the sulfate content, which underlines the labile property of the active sites. A new interpretation of the function of the calcination step is proposed and compared with models described in the literature. Springer Science+Business Media, LLC, 2007 calcination procedure nationallicence catalyst bed depth nationallicence calcination atmosphere nationallicence calcination duration nationallicence sulfated zirconia nationallicence n -butane isomerization nationallicence Li Xuebing Technische Universität München, Lehrstuhl für Technische Chemie II, Lichtenbergstraße 4, 85747, Garching, Germany aut Nagaoka Katsutoshi Technische Universität München, Lehrstuhl für Technische Chemie II, Lichtenbergstraße 4, 85747, Garching, Germany aut Simon Laurent Technische Universität München, Lehrstuhl für Technische Chemie II, Lichtenbergstraße 4, 85747, Garching, Germany aut Olindo Roberta Technische Universität München, Lehrstuhl für Technische Chemie II, Lichtenbergstraße 4, 85747, Garching, Germany aut Lercher Johannes Technische Universität München, Lehrstuhl für Technische Chemie II, Lichtenbergstraße 4, 85747, Garching, Germany aut Catalysis Letters Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 113/1-2(2007-01-01), 34-40 1011-372X 113:1-2<34 2007 113 10562 https://doi.org/10.1007/s10562-006-9005-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10562-006-9005-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Xuebing Technische Universität München, Lehrstuhl für Technische Chemie II, Lichtenbergstraße 4, 85747, Garching, Germany aut NATIONALLICENCE 700 1- Nagaoka Katsutoshi Technische Universität München, Lehrstuhl für Technische Chemie II, Lichtenbergstraße 4, 85747, Garching, Germany aut NATIONALLICENCE 700 1- Simon Laurent Technische Universität München, Lehrstuhl für Technische Chemie II, Lichtenbergstraße 4, 85747, Garching, Germany aut NATIONALLICENCE 700 1- Olindo Roberta Technische Universität München, Lehrstuhl für Technische Chemie II, Lichtenbergstraße 4, 85747, Garching, Germany aut NATIONALLICENCE 700 1- Lercher Johannes Technische Universität München, Lehrstuhl für Technische Chemie II, Lichtenbergstraße 4, 85747, Garching, Germany aut NATIONALLICENCE 773 0- Catalysis Letters Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 113/1-2(2007-01-01), 34-40 1011-372X 113:1-2<34 2007 113 10562 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer