Alumina supported La, Co oxides and LaCoO3 perovskite: preparation and catalytic SO2 reduction by CO

The addition of rare earth oxide La₂O₃ with variable valences to Co₃O₄ formed a mixture of complex oxide-La₂O₃ CO₂O₃/AI₂O₃. This complex can be used as the catalyst for the reduction of SO₂ by CO. In the fixed-bed flow reactor, experiments were investigated for studying the activation process of this catalyst and effect factors such as activation temperature and space velocity on the activation reactions under the following conditions: composition of the gas mixture nCO: nSO₂=2:1, balancing with N₂ and flow rate 120 ml/min. The microscopic structure, catalytic specific surface, change of structure are analyzed and characterized by SEM, BET, XRD. Desulfurization behaviors were investigated for La₂O₃ CO₂O₃/AI₂O₃ in this paper.