Evaluation of Pd-based catalysts and the influence of operating conditions for autothermal reforming of dimethyl ether
2007 (English)In: Applied Catalysis B: Environmental, ISSN 0926-3373, E-ISSN 1873-3883, Vol. 76, 41-49 p.Article in journal (Refereed) Published
A series of different Pd-based catalysts supported on ceramic monoliths were synthesized and tested in a screening study for autothermal reforming of dimethyl ether (DME). Alumina-supported Pd was shown to be very active for this reaction at temperatures between 350 and 400 degrees C. Adding Zn to Pd/gamma-Al2O3 decreased the activity of decomposition reactions leading to better reforming activity, and resulting in high selectivity to carbon dioxide. Pd-Zn/gamma-Al2O3 was further evaluated in a parameter study varying oxygen-to-DME ratio, steam-to-DME ratio and temperature. The effect on the reformer performance of changing the operating conditions is discussed. The Pd-Zn/gamma-Al2O3 catalyst generated carbon monoxide concentrations below 5%, and hydrogen concentrations close to 50%. The catalyst performance was significantly improved by preconditioning in hydrogen. Results from a first round of catalyst characterization studies suggest that Pd-Zn species are formed on the alumina support following reduction
Place, publisher, year, edition, pages
2007. Vol. 76, 41-49 p.
hydrogen; autothermal reforming; dimethyl ether; auxiliary power unit
IdentifiersURN: urn:nbn:se:kth:diva-10022DOI: 10.1016/j.apcatb.2007.05.011ISI: 000250799700006ScopusID: 2-s2.0-34948843511OAI: oai:DiVA.org:kth-10022DiVA: diva2:201356
QC 201008042009-03-042009-03-042010-12-06Bibliographically approved