원문정보
초록
영어
Carbon monoxide (CO) is one of the most common and widely distributed poisonous air pollutants. Oxidation of it to CO2 is an important process. Mixed metal oxides, cobalt oxide and zinc oxide with varying mole ratios were synthesized by co-precepitation technique. The synthesized materials were characterized by powder X-ray diffraction (XRD) for detection of crystalline phases, Fourier Transform Infrared Spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) technique, Scanning electron microscopy (SEM) for morphology, diffuse reflectance ultraviolet-visible (DRS-UV-vis) to understand the oxidation state and coordination number of metal ions in solid samples. The XRD patterns carried the peaks pertaining to Co3O4 phase along with the crystalline wurtzite phase of ZnO in the mixed oxide catalyst. The CO oxidation performance of the synthesized catalyst was tested and the results revealed that the catalyst containing equal mole ratio of both the metal oxides exhibited high activity at low temperature of 70° C, while others showed the maximum conversion at 120 ° C. Presence of zinc oxide lowers the oxidation temperature. Hence cobalt oxide- zinc oxide catalyst is considered as one of the better choice of catalyst system for CO oxidation.
목차
1. Introduction
2. Experimental
2.1. Materials
2.2. Methods
2.3. Catalyst Characterization
2.4. CO conversion experiments
3. Results and Discussion
3.1. Characterization
3.2. CO oxidation
4. Conclusions
Acknowledgements
References