Deactivation of TS-1 catalyst for one-step production of phenol by oxidation of benzene with hydrogen peroxide

The catalytic performances of TS-1 catalyst for one-step production of phenol by oxidation of benzene with peroxide hydrogen were studied,the results indicate that TS-1 has high activity in the early stages of reaction but easy to inactivation.XRD,SEM,micro-structural analysis and TG-DTA were used for the study on the fresh catalysts and deactivated catalysts.The results show that the framework structure of deactivated catalyst do not change,crystal form,grains and particle size do not vary obviously either.the deactivated catalyst appeared weight loss around the temperature of 320 ℃.The deactivated catalysts can be reactivated by calcinations this indicates that deactivation caused by catalyst coking of by-produces is temporary instead of permanent.