Salāmat-i kār-i Īrān (Sep 2018)
The utilization of Non-Thermal Plasma technology in carbon monoxide removal using propane gas
Abstract
Background and aims: In recent years, non- thermal plasma could has yield desirable and successful results, in spite of some challenges and limitations. In particular, in emission control of mobile and stationary sources. CO pollutant, which is emitted from various emission sources is a toxic gas and employee exposure at indoor and outdoor workplaces is one of the main world challenges. The approach of present study is to investigate the key performance parameters of non- thermal plasma in CO treatment efficiency by considering of techno- economic considerations at reactor design. Methods: A coaxial reactor composed of two inner (quartz) and outer (pyrex) tubes as dielectric material, tungsten electrode as cathode and copper foil as anode material has been used. In this study, we have investigated the parameters of temperature, space time, reductant gas, and current intensity of power supply voltage on removal efficiency of the pollutant. Sample size and sampling methods are determined based on the experimental design (i,e,. in two and four level) and ASTM D5835 standard method, Respectively. Data analysis has been done by SPSS software (version 22). Results: The mean conversion of 28- 29% for carbon monoxide is achieved under optimum conditions by temperature of 110 oC, propane to carbon monoxide ratio of 0.05 and SIE of 1000- 1400 j/l. This is one of the main results of present research and suitable primary alternatives at future researches to utilize non- thermal plasma technology. Conclusion: In this study, the key parameters of space time and temperature have been shown significant effect on removal efficiency of pollutant. While, due to molecular- chemical structure of CO gas and complexity of participation during redox reactions in NTP reactor, the presence and concentration of propane gas has no significance effect on treatment efficiency. So, consideration of relevant parameters of electron density, gas mixture properties, and geometric characteristics in designing step could play key role in optimization of temperature conditions and pollutant space time.
