Abstract
Macromolecule polyvinylpyrrolidone (PVP)-immobilized Pt nanoclusters supported on HBeta, HY, NaY and SiO 2 catalysts (signed as PVP-Pt/S) prepared by the alcohol–water reduction method are examined for their catalytic performance in the two step conversion of methane to higher hydrocarbons and compared with corresponding supported Pt catalysts (noted as Pt/S) prepared by the general incipient wetness impregnation method. The nature of the support affects the formation of C 2 + hydrocarbons, by influencing the electronic state of Pt in catalysts Pt/S. The C 2 + hydrocarbon amounts of methane conversion on PVP-Pt/S catalysts do not depend greatly on the supports and but binding energy of supported Pt clusters. Compared with the Pt/S catalysts, PVP-Pt/S catalysts have such characteristics as: (1) a well-dispersed and uniform particle size which can be controlled by adjusting the added amount of PVP; (2) a diminished interaction between the metal particle and support. This class of catalyst, therefore, may be expected to study the effect of particle size upon the catalytic activity and selectivity. The catalytic results combined with TEM over PVP-Pt/HBeta with various ratios of PVP to platinum show that the activity of catalysts increases for methane conversion with decrease of particle size, and the distributions of C 2+ products vary in favour of the heavier hydrocarbons as the particle size increase.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
