Development of a Coil-Shape Photocatalysis-Plasma Synergistic Reactor for a Practical and Long-Term Usable Air-Cleaner

Abstract

A novel air-cleaner with a coil-shape photocatalysis-plasma synergistic reactor was developed. The air-cleaner showed 95% ± 1% reduction of a TVOCs concentration in tobacco smoke at "single-pass" condition. Air-purification activity of the air-cleaner was stably-maintained after the treatment of 12,000 cigarettes of tobacco smoke.

Field Performance Test of an Air-Cleaner with Photocatalysis-Plasma Synergistic Reactors for Practical and Long-Term Use

“…Photocatalysis-plasma synergistic reactors have been recently proposed for use in air-cleaners [1,2,3,4]. The synergistic effects of photocatalysis and plasma excitation achieve significant oxidative decomposition of gaseous compounds in laboratory tests.…”

“…The coil-shaped reactor (Figure 1), using plasma-assisted catalytic technology (PACT) [5] and a TiO 2 impregnated Ti-mesh filter (TMiP TM ) [6], shows long-term capability of removing tobacco smoke compounds. High-level air-purification activity was maintained in the air-cleaner with the coil-shaped reactor (≥98, 98.9% ± 0.1%, and 88% ± 1% removal of the odour concentration, total suspended particulate (TSP), and total volatile organic compound (TVOC) concentrations, respectively) even after the treatment of 12,000 cigarettes-worth of tobacco smoke, which is the equivalent of using the air-cleaner in the smoking room for 6 months [4]. In this study, a field test of the air-cleaner using the coil-shaped reactor was carried out for 84 days in a functioning smoking room (Figure 2) of a typical office building.…”

“…Image and schematic illustration of the coil-shaped PACT-TMiP synergistic reactor ( left ) and the air-cleaner ( right ). Reproduced from Ochiai et al [4], published byScientific Research Publishing Inc., 2014.…”

Preventing the spread of norovirus-like infections by the airborne route using plasma assisted catalytic technology (PACT)

“…Although filtration by heating, ventilation, and air conditioning (HVAC) systems can control pathogens, it does not effectively sterilize the air and it is possible that pathogens are released from the filter [ 10 ]. Accordingly, plasma assisted catalytic technology (PACT), a novel chemical reactor which can decompose various hazardous gases including volatile organic compounds (VOC), is a promising candidate for effective sterilization [ 13 , 14 ]. The PACT principle demonstrates the synergistic effects of plasma excitation and catalytic activation [ 6 , 14 , 17 , 18 ].…”

“…The PACT principle demonstrates the synergistic effects of plasma excitation and catalytic activation [ 6 , 14 , 17 , 18 ]. The PACT device functions, in part through the production of ozone and other oxygen radicals [ 5 , 13 ]. PACT may be expected to sterilize airborne virus more efficiently than other conventional sterilization methods.…”