Research On High Efficient Catalytic Preparation For Ventilation Air Methane High Efficient Utilization

Ventilation Air Methane (VAM) has plenty of methane in lean concentration. Catalytic combustion is more potential technology for use of VAM. This paper studies the preparation of new type catalysts, carries on the correlation theory and experimental study for VAM using catalyst development. Novel porous alumina with extensive surface area and specific morphology and structure was synthesized by sol-gel method. Preparation of a new type of precious metals of Pd/Al2O3and non-precious metal compound, Cu-Mn/Al2O3monolithic catalysts with both mesoporores and micrometer-scale macropores by thermal adsorption method and dipping method was realized using the as-synthesized porous alumina as the carrier and Ce, Zr and La as the additives. The probe experiment evaluation of the catalyst catalytic oxidation activity carried out. And its physicochemical properties as well as methane combustion catalytic activity was characterized. Growth rule was researched through the physicochemical properties characterization of co-catalytic and active components. Methane catalytic oxidation active influence law and mechanism of this carrier, co-catalytic and active component was concluded. When the CH4volume fraction was1%, the reaction gas space velocity was6000h-1, the ignition temperatures of2%Pd/Al2O3and0.5MCu-Mn/Al2O3monolithic catalyst were227℃and314℃respectively.