Integrated process for the removal of indoor VOCs from food industry manufacturing: Elimination of Butane-2,3-dione and Heptan-2-one by cold plasma-photocatalysis combination

Abstract

Plasma catalysis association for indoor air treatment has been investigated.  Synergetic effect between plasma and catalysis has been confirmed  Good performance on combination of photocatalysis to plasma technologies.  Mineralization and oxidize by-products of a binary mixture were monitored.

Innovative photocatalytic reactor for the degradation of VOCs and microorganism under simulated indoor air conditions: Cu-Ag/TiO2-based optical fibers at a pilot scale

“…A comparative study of Heptan-2-one and Butane-2,3-dione behavior's was exhibited in our previous work (Glass Fiber Tissue as catalyst) [30] and the removal A c c e p t e d m a n u s c r i p t efficiency would be much more remarkable in the case of Butane-2,3-dione which is why presently we are working with Butane-2,3-dione alone. In order to improve the performance of this photocatalytic reactor and achieve higher levels of VOC removal, it is interesting to investigate(i) the effect of the number of the catalyst plates and (ii) the effect of space/air gap between the plates.…”

“…Heptan-2-one) [30], aldehydes (e.g. Butyraldehyde) [29] and related the slowdown in the performance.…”

“…The polluted air flow was generated continuously by means of a syringe pump system (Kd Scientific Model 100, USA) in order to obtain a stable VOC concentration during the experiment (from 5 to 20 mg.m -3 ). To create a VOCs/air mixture, two similar injection systems are used for each pollutant [29][30][31]. A static mixer at upstream ensures a proper mixing of air .…”

“…This trend clearly demonstrates that Heptan-2-one presents a long molecular chain (C7H14O), harder to degrade via photocatalytic oxidation. Moreover, in our previous work, a classical configuration of the reactor was used with a TiO2-GFT catalyst (Glass Fiber Tissue) and illuminated with external UV Lamp [30], oxidize by-products exhausts from C4H6O2/C7H14O mixture are identified. Indeed, for a classical Butane-2,3-dione, (3) Heptan-2-one, (4) acetic acid, (5) formic acid, propionic acid, butanoic acid, pentanoic acid, hexanoic acid and Heptane2,6-dione.…”

“…It is observed that when the water vapor amount is higher (~70%), the effect of the competitive adsorption/oxidation phenomena between VOCs, H2O and E. coli becomes more important which causes the VOCs/E. coli removal decrease[30,[54][55][56]. However, indoor air in the food industry is usually humid (around 75-95% of humidity).…”