Design of Stable Catalysts for Methane-Carbon Dioxide Reforming

Abstract

PtZrO2 is an active and stable catalyst for methane- carbon dioxide reforming reaction. The reaction between CO2 and CH4 to yield synthesis gas might proceed vie two different pethways. At high temperatures (>1075K) CO2 can be dissociated on Pt to CO and absorbed oxygen. Methane can be dissociated to H2 and carbon at temperatures above 755K. Recombination of the absorbed oxygen and carbon yields a second CO molecule. At low temperatures i.r. studies of CO2 absoption on PtZrO2 showed that CO was formed and in addition carbonates were formed on the support. A linear relatioship between the activity and the Pt-ZrO2 perimiter length indicates that the support might be important for activating carbon dioxide and subsequent reaction with carbon.