Preparation, characterization and deactivation studies of Co–Mo/γ–Al2O3 deoxidizing catalyst Original Research Article

A deoxidizing catalyst was prepared in this paper. Several characterization techniques (XRD, SEM–EDS, TEM, TPD and TPR) were used to study its structure and properties. A normal pressure micro-reactor was built to study its deoxidizing performance. Results show that when inlet O2 concentration was 0.1%, space velocity was 3000–12 000 h−1 and operation temperature was above 80 °C, the outlet residual O2 can be as low as 1.0 × 10−6 (v/v). 300 h continuous operation shows that its deoxidizing activity was stable. Through comparison of the deoxidizing activities for fresh and deactivated catalyst and by simulating the water vapor contents in system, the mechanism of deactivation and reactivation was studied.