Production of hydrogen from methanol over Cu/ZnO catalysts promoted by ZrO2 and Al2O3
2003 (English)In: Journal of Catalysis, ISSN 0021-9517, E-ISSN 1090-2694, Vol. 219, no 2, 389-403 p.Article in journal (Refereed) Published
Production of H-2 from methanol by steam reforming, partial oxidation, or a combination thereof was studied over Cu/ZnO-based catalysts. The catalysts were characterized by a variety of techniques, including N2O chemisorption, X-ray photoelectron spectroscopy, X-ray diffraction, and temperature-programmed reduction/oxidation. The influence of feed composition, reaction temperature, and catalyst formulation on H-2 production rate, product distribution, and catalyst lifetime was investigated. Distinct differences between the processes were observed with respect to catalyst behavior. ZrO2-containing catalysts, especially Cu/ZnO/ZrO2/Al2O3, exhibit the best performance in the steam reforming reaction. During partial oxidation, however, a binary Cu/ZnO catalyst exhibits the lowest light-off temperature and the lowest level of CO by-product. The redox properties of the catalyst appear to play a key role in determining the pathway for H-2 production. In particular. the extent of methanol and/or H-2 combustion at differential O-2 conversion is strongly dependent on the ease of copper oxidation in the catalyst.
Place, publisher, year, edition, pages
2003. Vol. 219, no 2, 389-403 p.
fuel cell, methanol steam reforming, methanol oxidation (partial), Cu/ZnO/ZrO2/Al2O3 catalyst, characterization, N2O chemsorption, TPR/TPC, XPS, ray photoelectron-spectroscopy, fuel-cell applications, copper-based, catalysts, partial oxidation, absorption-spectroscopy, selective, production, reforming reaction, cuznal(zr)-oxide catalysts, surface, characterization, oxide catalysts
IdentifiersURN: urn:nbn:se:kth:diva-22877DOI: 10.1016/s0021-9517(03)00221-5ISI: 000185830900014OAI: oai:DiVA.org:kth-22877DiVA: diva2:341575
QC 201005252010-08-102010-08-10Bibliographically approved