KIT | KIT-Bibliothek | Impressum | Datenschutz

Direct dehydrogenation of methanol to formaldehyde over ZnO–SiO2 -based catalysts

Chowdhury, Ankur Ghosh 1; Arnold, Ulrich 1; Garbev, Krassimir ORCID iD icon 2; Bender, Michael; Sauer, Jörg ORCID iD icon 1
1 Institut für Katalyseforschung und -technologie (IKFT), Karlsruher Institut für Technologie (KIT)
2 Institut für Technische Chemie (ITC), Karlsruher Institut für Technologie (KIT)

Abstract:

Direct dehydrogenation of methanol to formaldehyde and hydrogen is a “dream reaction” requiring
catalysts, which are not only active in this highly endothermic reaction but also stable under harsh reaction
conditions. Previous reports showed that materials with Zn2SiO4 exhibit a relatively high activity along with
considerable long-time stability. However, neither detailed information on the physicochemical properties
of such zinc silicates nor information on deactivation mechanisms was provided and discussed. In this
study, the Zn : Si ratio has been varied to obtain different phases of zinc silicate and to investigate their
specific activities in the methanol dehydrogenation reaction. Amorphous ZnO and SiO2, as well as
crystalline phases of zinc oxide and zinc silicate, viz. α-Zn2SiO4 and β-Zn2SiO4, were present in almost all
materials in different concentrations. The β-Zn2SiO4 phase was found to be relatively unstable in methanol
dehydrogenation similar to ZnO, which is readily reduced to metallic Zn. Since detailed material
characterization was not reported in studies before, the catalytic role of different phases present in zinc
... mehr

Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Institut für Technische Chemie (ITC)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 27.08.2024
Sprache Englisch
Identifikator ISSN: 2044-4753, 2044-4761
KITopen-ID: 1000173693
HGF-Programm 38.03.02 (POF IV, LK 01) Power-based Fuels and Chemicals
Weitere HGF-Programme 38.05.02 (POF IV, LK 01) Metals and Minerals Cycle
Erschienen in Catalysis Science and Technology
Verlag Royal Society of Chemistry (RSC)
Band 14
Heft 17
Seiten 4958–4967
Vorab online veröffentlicht am 11.07.2024
Nachgewiesen in OpenAlex
Dimensions
Web of Science
Scopus

Verlagsausgabe §
DOI: 10.5445/IR/1000173693
Veröffentlicht am 26.08.2024
Seitenaufrufe: 65
seit 26.08.2024
Downloads: 34
seit 27.08.2024
Cover der Publikation
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page