Investigation of hybrid plasma-catalytic removal of acetone over CuO/γ-Al2O3 catalysts using response surface method.
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.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, PR China.
Xinbo
X
Zhu
Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, UK. Electronic address: xin.tu@liverpool.ac.uk.
Xin
X
Tu
Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, UK.
Danhua
D
Mei
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, PR China.
Chenghang
C
Zheng
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, PR China.
Jinsong
J
Zhou
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, PR China. Electronic address: xgao1@zju.edu.cn.
Xiang
X
Gao
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, PR China.
Zhongyang
Z
Luo
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, PR China.
Mingjiang
M
Ni
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, PR China.
Kefa
K
Cen
D000096:Acetone / Q000737:chemistry*; D000392:Air Movements; D000537:Aluminum Oxide / Q000737:chemistry*; D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D010084:Oxidation-Reduction; D058626:Plasma Gases / Q000032:analysis
D058626:Plasma Gases; D000096:Acetone; D003300:Copper; D000537:Aluminum Oxide; C030973:cupric oxide
Acetone removal; CuO/γ-Al(2)O(3); Dielectric barrier discharge; Plasma-catalysis; Response surface method