Optimization of non-thermal plasma efficiency in the simultaneous elimination of benzene, toluene, ethyl-benzene, and xylene from polluted airstreams using response surface methodology

Abstract

Treatment with a non-thermal plasma (NTP) is a new and effective technology applied recently for conversion of gases for air pollution control. This research was initiated to optimize the efficient application of the NTP process in benzene, toluene, ethyl-benzene, and xylene (BTEX) removal. The effects of four variables including temperature, initial BTEX concentration, voltage, and flow rate on the BTEX elimination efficiency were investigated using response surface methodology (RSM). The constructed model was evaluated by analysis of variance (ANOVA). The model goodness-of-fit and statistical significance was assessed using determination coefficients (R and R) and the F-test. The results revealed that the R proportion was greater than 0.96 for BTEX removal efficiency. The statistical analysis demonstrated that the BTEX removal efficiency was significantly correlated with the temperature, BTEX concentration, voltage, and flow rate. Voltage was the most influential variable affecting the dependent variable as it exerted a significant effect (p< 0.0001) on the response variable. According to the achieved results, NTP can be applied as a progressive, cost-effective, and practical process for treatment of airstreams polluted with BTEX in conditions of low residence time and high concentrations of pollutants.

Inhibiting the Dealkylation of Basic Arenes during n-Alkane Direct Aromatization Reactions and Understanding the C6 Ring Closure Mechanism

“…The application of this mechanism is also more desirable for the aromatization of n-heptane and noctane compared to n-hexane as benzene is a human carcinogen, thus, toluene and xylenes are preferred. 24 Herein, we demonstrate that a Pt/KMFI catalyst is capable of inhibiting dealkylation and coking mechanisms while increasing C6 ring closure selectivity for C7 and C8 n-alkane aromatization reactions compared to Pt/KL. This effect is pronounced further still by the placement of excess potassium on the catalyst during synthesis.…”

Janus membranes for membrane distillation: Recent advances and challenges

“…Plasma technology is widely used in membrane technology to change the properties of the surface layer to desired property, mostly to prepare surface for adopting of a coating layer [26]. Plasma etching can scratch a very thin layer of the membrane substrate and prepare condition for making interaction with coating layer [99,100].…”

Shear Stress on the Structure Control of a Supported Fly Ash‐Based Catalyst and Its Application in SCR* Denitration

“…SCR (Selective Catalytic Reduction) is the most widely used denitration method. [4] It can make the removal efficiency reach more than 90 %. The basic principle of SCR technology is that the reducing agent (NH 3 ⋅H 2 O) is used to contact the NO X pollutants in the flue gas under the catalysis of the catalyst.…”

“…SCR (Selective Catalytic Reduction) is the most widely used denitration method [4] . It can make the removal efficiency reach more than 90 %.…”