The Performance Investigation For The Removel Of Formaldehyde And Application Analysis On Trombe Wall Over Photo/thermalcatalysts

People have payed more and more attentions on indoor pollution problem nowadays.Formladehyde is a typiacl kind of indoor contaminants.Based on two advaced catalytic technologies of solar photocatalytic oxidation technology and solar driven thermal catalytic oxidation technology,this thesis proposes a novel solar system that combined solar catalytic oxidation technology and Trombe wall.Based on the complexity of work conditions in Trombe wall applied in real indoor environment,this thesis conducted the preliminary works about the mutli-factor kinetic in photocatalytic type Trombe wall,which could provide the theoretical basis for the study of the novel Trombe wall.Firstly,this thesis deduce the four-factor kinetic expression based on the mechanism of photocatalytic oxidation of formaldehyde.Then the experiments of photocatalytic oxidation of formaldehyde over ceramic fiber paper-TiO2 film were conducted.The experiments parameters were chosen as follows:HCHO concentrations:150?900 ppb;humidities:0.20?0.90 RH;UV light intensities:0.20?0.90 mW/cm2;temperatures:15.0?45.0?.The dependence of photocatalytic reaction rate on four factors were investigated.We fitted four-factor kinetic model with the experimental results.The fitting degree and root mean square deviation were 97.11%and 7.24%,respectively.Futhermore,we compared the consistency between the fitting kinetic expressing and the theoretically deduced kintic expression.In addition,we conducted the exprerimental investigation of thermalcatalytic type Trombe wall.The catalysts MnOx-CeO2 were prepared by the co-coprecipitation method.We built experimental testing platform of air purification-type Trombe Wall system using formaldehyde gas as model pollutant.A full-day experiment was conducted to investigate the air heating performance and formaldehyde degradation performance.Results showed that the air purification-type Trombe Wall had excellent space heaing and air purification performance and huge potential in the field of energy and environment in Hefei.The instantaneous air heating efficiency and formaldehyde degradation efficiency were in the range of 0.10?0.40 and 0.30?0.60,respectively.And the daily air heating efficiency was 0.21 and the daily generated total volume of fresh air was 284 m3/(m2 day).