Reaction kinetic study of nonthermal plasma continuous degradation of acetone in a closed-loop reactor

Insights into non-thermal plasma chemistry of acetone diluted in N2/O2 mixtures: a real-time MS experiment

“…With increasing oxygen content, the degradation efficiency of acetone drops drastically as shown on Figure 1, as expected from previous results obtained for the UV510 reactor at 2000 ppm and at 5000 ppm of acetone 10 , and also from other non-thermal plasma results 36,37 . In pure nitrogen, the degradation presents a two-step process for initial concentration higher than 100 ppm as observed in our previous work 19 .…”

“…It is clear from results displayed in Figure 5 that oxygen favored ketene at the expense of acetaldehyde. It results from a complex balance between all reactions cited above, (28) to (36).…”

A critical review on plasma-catalytic removal of VOCs: Catalyst development, process parameters and synergetic reaction mechanism

“…For instance, Li et al reported that methanol, acetaldehyde, formic acid, and acetic acid were the main by-products in the acetone decomposition process in a DBD reactor. Acetone was dissociated into methyl, acetyl radicals, and H• via collisions with high-energy electrons, which were further oxidized into acetaldehyde, methanol, and other compounds through oxidation reaction with O or OH radicals (Li et al, 2019b;Li et al, 2020b). Han et al employed a gas chromatography-mass spectrometer (GC-MS) to detect the intermediates formed in the toluene decomposition process in a single DBD reactor (Han et al, 2020).…”

“…In recent years, kinetic models (empirical kinetic model, semi-empirical kinetic model, and kinetic model of mechanism) of the plasma-catalytic removal of VOCs were proposed by a significant number of studies (Huang et al, 2011a;Klett et al, 2012;Li et al, 2020b;Liang and Li, 2018;Qin et al, 2019;Ye et al, 2016;Zhu et al, 2015b). Klett et al represent the respective efficiency of the discharge and post-discharge periods in the pollutant removal by developing a quasi-homogeneous zero-dimensional chemical model (Klett et al, 2012).…”

C-dot doping for enhanced catalytic performance of TiO2/5A for toluene degradation in non-thermal plasma-catalyst system

“…Volatile organic compounds (VOCs) released from nature and various gaseous industrial effluents are considered harmful to human health and the environment due to their toxicity and the participation of their precursors in the formation of photochemical smog, ground-level ozone, and organic aerosols (Kamal et al 2016;Li et al 2020a). To date, great efforts have been made to investigate VOC removal techniques, including carbon adsorption (Zhang et al 2017), photocatalysis (Mamaghani et al 2017;Shayegan et al 2018;Zadi et al 2018), catalytic oxidation (He et al 2019), thermal combustion (Jablonska et al 2015), and biological treatment (Li et al 2020b). However, these conventional VOC removal methods have many restrictions, such as huge operating facilities, catalyst deactivation, high energy consumption, and, particularly, for the treatment of dilute concentration compounds.…”