Removal of dilute binary and tertiary gas mixture of acetaldehyde, ammonia and trimethyl amine in nitrogen using electron-attachment reactor at high temperature

Abstract

To investigate the effect of temperature on the removal of acetaldehyde, ammonia and trimethyl amine gases from N2 using electron attachment reactor. The target gases are malodorous gaseous components emitted at high temperature from a crematory furnace. Since the emitted gases from a crematory furnace consist of CO2, O2 and water vapor, the factors investigated are percentage of coexisting CO2, O2 and the concentration of water vapor in the N2 gas stream. To understand the effect between the target gases, the experiments are carried out both for the separate removal of target gases and the simultaneous removal of 2 and 3 target gases. The experimental results reveal that, it is found that the presence of carbon dioxide does significantly affect the removal efficiency. The higher the CO2 concentration is employed, the higher the removal efficiency become, the presence of oxygen enhances the removal efficiency of the target gases both in the separate removal of target gases and the simultaneous removal of 2 and 3 target gases. The presence of water vapor enhances the removal efficiency of the target gases from N2 at low temperature but slightly retards it at high temperature. The presence of CO2 in nitrogen, oxygen and water vapor mixture has adverse effect on the removal efficiency. The effects between the target gases on the simultaneous removal of 2 and 3 target gases are investigated. It is found that in the case of the simultaneous removal of 3 target gases, the number of acetaldehyde, ammonia and trimethyl amine gas molecules captured by an electron are higher than in the case of simultaneous removal of these 2 target gases. Furthermore, the application of two independently operated corona-discharge reactors in series is shown to have a good and promise for enhancing the removal efficiency and minimizing the generation of byproducts. It is found that the effluent O3 and NOx are removed completely. On the other hand, CO increases, current increases.