Processing of coked Pt-Re/γ-Al2O3 catalysts with high-concentration ozone dissolved in supercritical carbon dioxide

The potentialities of low-temperature (50–150°C) regeneration of coked Pt-Re/γ-Al2O3 bimetallic catalysts of reforming with high-concentration ozone dissolved in supercritical carbon dioxide (SC-CO2) are examined. Raman spectroscopy, thermogravimetric, and differential microcalorimetric studies show that solid organic deposit (coke), a by-product of the reforming process, can be partially removed from the mesoporous surface of a coked catalyst by processing with an O3/SC-CO2 mixture without any loss of the active components (Pt, Re). Treatment of coked Pt-Re/γ-Al2O3 catalysts with an O3/SC-CO2 mixture causes changes in the parameters (extent of conversion, selectivity) of the catalytic reforming of n-heptane.