Zhu Xinbo, Tu Xin, Mei Danhua, Zheng Chenghang, Zhou Jinsong, Gao Xiang, Luo Zhongyang, Ni Mingjiang, Cen Kefa
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, PR China.
Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, UK.
Chemosphere. 2016 Jul;155:9-17. doi: 10.1016/j.chemosphere.2016.03.114. Epub 2016 Apr 16.
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.
在本工作中，在圆柱形介质阻挡放电（DBD）反应器中进行了CuO/γ-Al2O3催化剂上低浓度丙酮的等离子体催化去除。与使用纯γ-Al2O3载体的等离子体过程相比，等离子体与CuO/γ-Al2O3催化剂的结合显著提高了丙酮的去除效率，其中5.0 wt% CuO/γ-Al2O3催化剂表现出最佳的丙酮去除效率，为67.9%。进行了催化剂表征，以了解催化剂性能对等离子体催化反应中CuO/γ-Al2O3催化剂活性的影响。结果表明，催化剂表面形成的表面氧物种对于等离子体催化反应中丙酮的氧化至关重要。使用中心复合设计（CCD）研究了各种操作参数（放电功率、流速和丙酮初始浓度）以及这些参数之间的相互作用对5.0 wt% CuO/γ-Al2O3催化剂上丙酮等离子体催化去除性能的影响。通过方差分析（ANOVA）评估了自变量及其相互作用的显著性。结果表明，气体流速是影响丙酮去除效率的最显著因素，而丙酮初始浓度在决定等离子体催化过程的能量效率方面起着最重要的作用。
