Abstract
The degradation of low concentrations of acetaldehyde while using a non-thermal plasma (NTP)/catalyst hybrid reactor system was investigated while using humidified air at ambient temperature. A series of highly active manganese-impregnated natural zeolite (Mn/NZ) catalysts were synthesized by the incipient wetness method using sonication. The Mn/NZ catalysts were analyzed by Brunauer-Emmett-Teller surface area measurements and X-ray photoelectron spectroscopy. The Mn/NZ catalyst located at the downstream of a dc corona was used for the decomposition of ozone and acetaldehyde. The decomposition efficiency of ozone and acetaldehyde was increased significantly using the Mn/NZ catalyst with NTP. Among the various types of Mn/NZ catalysts with different Mn contents, the 10 wt.% Mn/NZ catalyst under the NTP resulted the highest ozone and acetaldehyde removal efficiency, almost 100% within 5 min. Moreover, this high efficiency was maintained for 15 h. The main reason for the high catalytic activity and stability was attributed to the high dispersion of Mn on the NZ made by the appropriate impregnation method using sonication. This system is expected to be efficient to decompose a wide range of volatile organic compounds with low concentrations.
Highlights
The increase in volatile organic compounds (VOCs) has become an important environmental issue worldwide, because VOCs are typically odorous substances that can cause discomfort and have an adverse impact on human health [1,2]
Postremoval plasma reaction of the catalyst used. These results that the non-thermal plasma (NTP) process is essential for the removal of increase the was overall efficiency the suggest removal of essential acetaldehyde andremoval ozone. These results suggest that thefor process is for the of acetaldehyde and the acetaldehyde and the additional use of the 10 wt.% Mn-impregnated natural zeolite (Mn/natural zeolite (NZ)) catalyst as a post plasma reaction can additional use of the 10 wt.% Mn/NZ catalyst as a post plasma reaction can increase the overall increase the overall efficiency for the removal of acetaldehyde and ozone
The Mn-impregnated natural zeolite (Mn/NZ) was prepared, and the removal efficiencies of ozone and acetaldehyde were evaluated under a humidified atmosphere
Summary
The increase in volatile organic compounds (VOCs) has become an important environmental issue worldwide, because VOCs are typically odorous substances that can cause discomfort and have an adverse impact on human health [1,2]. VOCs that are emitted from food waste are considered to be a severe problem in Korea, and the government has been trying to reduce the levels of VOCs to improve health and quality of life. Acetaldehyde is one of the main odorous components generated during food waste decomposition, and it is generally difficult to degrade than other components. Various methods, including adsorption [3,4,5,6,7], thermal and catalytic oxidation [8], and photo-catalysis [9,10], have been applied for the removal of high concentrations of VOCs in air. Alternative technologies need to be developed to overcome the limitations of conventional methods, which cannot be applied effectively for the removal of low concentrations of VOCs
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
