| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 4407536 | Chemosphere | 2016 | 9 Pages |
•Acetone removal was improved using CuO/γ-Al2O3 catalysts in a plasma reactor.•5 wt% CuO/γ-Al2O3 exhibited the best plasma-catalytic performance for the removal of acetone.•Response surface method was used to evaluate the importance of different operating parameters.•The gas flow rate was the most significant factor to determine the removal efficiency of acetone.•The initial concentration of acetone played the most important role in the energy efficiency.
In this work, plasma-catalytic removal of low concentrations of acetone over CuO/γ-Al2O3 catalysts was carried out in a cylindrical dielectric barrier discharge (DBD) reactor. The combination of plasma and the CuO/γ-Al2O3 catalysts significantly enhanced the removal efficiency of acetone compared to the plasma process using the pure γ-Al2O3 support, with the 5.0 wt% CuO/γ-Al2O3 catalyst exhibiting the best acetone removal efficiency of 67.9%. Catalyst characterization was carried out to understand the effect the catalyst properties had on the activity of the CuO/γ-Al2O3 catalysts in the plasma-catalytic reaction. The results indicated that the formation of surface oxygen species on the surface of the catalysts was crucial for the oxidation of acetone in the plasma-catalytic reaction. The effects that various operating parameters (discharge power, flow rate and initial concentration of acetone) and the interactions between these parameters had on the performance of the plasma-catalytic removal of acetone over the 5.0 wt% CuO/γ-Al2O3 catalyst were investigated using central composite design (CCD). The significance of the independent variables and their interactions were evaluated by means of the Analysis of Variance (ANOVA). The results showed that the gas flow rate was the most significant factor affecting the removal efficiency of acetone, whilst the initial concentration of acetone played the most important role in determining the energy efficiency of the plasma-catalytic process.
