Abatement of 3-methylbutanal and trimethylamine with combined plasma and photocatalysis in a continuous planar reactor

Abstract

International audienceThis paper deals with the 3-methylbutanal ((CH3)2CHCH2COH) removal with the help of a nonthermal surface plasma discharge coupled with photocatalysis. The capability of this process for gas treatment was studied. A planar reactor system was developed in order to perform the effect of adding photocatalytic material in plasma surface discharge barrier dielectric (SDBD) zone on (i) 3-methylbutanal removal, (ii) selectivity of CO2 and CO, (iii) byproducts formation such ozone formation. It was found that the influence of the UV light generated by SDBD reactor was very low. The activation of the photocatalyst media could be negligible. Whereas, the introduction of external UV light to the process improves significantly the removal efficiency of 3-methylbutanal (3MBA) and the mineralization. A synergetic effect was observed by combining plasma SDBD and photocatalysis from all experiments and with other pollutant such as trimethylamine (N(CH3)3). Moreover, the byproducts of 3MBA were identified and evaluated with plasma SDBD, photocatalysis and plasma SDBD/photocatalysis combination

Synergetic Effect Between Plasma and UV for Toluene Conversion in Integrated Combined Plasma Photolysis Reactor with KrCl/KrBr/XeCl/Xe2 Excilamp

“…This means that ozone acts not only as an electron acceptor, but also as a source to generate hydroxyl radicals in the UV/O 3 process . Presumably plasma itself can generate UV irradiation . However, it was found that the influence of the UV light generated by the plasma reactor was very low .…”

“…Presumably plasma itself can generate UV irradiation . However, it was found that the influence of the UV light generated by the plasma reactor was very low . Another study proved that, in atmospheric air, the photocatalytic decomposition rate of acetaldehyde by the UV light of plasma is lower than 0.2 % of the decomposition rate of the plasma itself .…”

Photocatalytic abatement of o-xylene using adsorption enhanced ZnO/GAC catalyst in a continuous flow reactor: Catalytic potential, Fate of o-xylene and its by-products

“…Atmospheric VOCs can be generated by variety of industrial and commercial activities such as oil supplying, transportation, use of paints, polymers synthesis, metal degreasing, domestic activities, etc. (Arfaeinia et al, 2015;Assadi et al, 2014;Barzegar et al, 2014). Exposure to VOCs might cause headache, fatigue, irritation of respiratory tract, dizziness and nausea, skin irritation, rhinitis, and also toxic effects to the nervous system (Auvinen and Wirtanen, 2008;Mirzaei, 2016;Mo et al, 2009).…”

“…In this technique, a semi-conductor photocatalyst is activated by photons generated by a UV radiation lamp (sunlight or UV lamps) (Assadi et al, 2013;Bouzaza et al, 2006). It is proved that this technique has the ability to abate a large number of VOCs with a low energy consumption (Assadi et al, 2014;Pichat et al, 2000). Therefore, it seems to be a suitable method for treatment of air polluted by VOCs.…”

Abatement of VOCs with Alternate Adsorption and Plasma-Assisted Regeneration: A Review

“…In order to overcome these limitations, many attempts have been made and have engendered the development of a hybrid system using multiple techniques such as packed bed NTP reactors [16,17], NTP/electrostatic precipitation [18], NTP/catalysis [19,20], photocatalysis [21] and adsorption/NTP [22]. Among these VOC removal techniques, the combination of non-thermal plasma with catalysts/sorbents, i.e., plasma-catalysis, is remarkably investigated during the last decade because of their improved performance such as increased energy efficiency and suppressed unwanted This could also be an effective regeneration technique compared to conventional techniques like thermal treatment, which often leads to catalytic deactivation owing to particle agglomerations on catalyst surfaces and poses high a cost.…”