Indian Institute of Technology Delhi
Support Effects in CH4 Partial Oxidation over Ni-based Catalysts
Dr. Anna Maria Venezia
ISMN-CNR, Via Ugo La Malfa 153, 90146 Palermo, Italy, email: firstname.lastname@example.org
Date: November 28th 2017 (Tuesday)
Time: 11 AM
Venue: Committee Room, Chemistry Department, 6th Floor
The seminar will deal with the catalytic partial oxidation of methane (CPOM) considered as one of the most cost and energy efficient process for the indirect transformation of methane into valuable chemicals trough the production of the syngas, a mixture of H2 and CO. For such process Ni catalysts are suitable especially in terms of cost and reaction efficiency. The catalytic behavior of two specific Ni catalysts, prepared by microwave assisted co-precipitation on pure silica and on Ce-doped silica, will be presented. The catalytic CH4 partial oxidation reaction was performed at 1 atm in a temperature range of 400–800 °C using diluted feed gas mixture with CH4/O2 = 2 and gas hourly space velocity of 60,000 ml g−1 h−1. The two catalysts exhibited quite different catalytic behaviors. In particular, the temperature at which the reaction initiated revealed to be rather crucial. Temperature surface reaction with O2 and with pure CH4 and XPS, XRD and TGA characterization analyses of the fresh and spent catalysts allowed to explain the results in terms of structural changes induced by the reaction atmosphere.
All are cordially invited to attend.