The kinetics of the reaction between steam and spent activated carbon (from sucrose deposition) was studied at 1003 to 1123 K and 1 atm pressure. At these conditions some virgin carbon, upon which the sucrose was originally adsorbed, was also gasified. Rates of oxidation were essentially the same for spent and virgin activated carbon.The kinetics data fit a Langmuir-Hinshelwood equation, originallv proposed for gasification of other types of carbon, with an activation energy of 2.3 x lo5 J/mol.Surface area and pore volume measurements indicated that the adsorption capacity of the original carbon could be completely restored by thermal regeneration followed by reaction with steam. However, some activated carbon is lost implying that there would be an optimum extent of steam gasification in a cyclical adsorption-regeneration process.Kinetics studies are reported in Part I1 for the reaction between steam and carbon remaining after spent activated carbon has been thermally regenerated. The samples used were those dried by method B (drying at 393-403 K for three days, see Part I) and then thermally regenerated with helium in the TGA equipment at a rate of temperature increase of 0.3
Ws.When the temperature obtained a desired level (between K Chlhara and I Mats", are on leave from the Univer-lty of Tokyo 0001-1541-81.4374 0220-$2 "The American Institute of Chemical E n w e e r \ .