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Continuous elimination of gaseous dimethyl methylphosphonate by a photocatalytic flow reaction system

Paper ID Volume ID Publish Year Pages File Format Full-Text
45184 46405 2014 8 PDF Available
Title
Continuous elimination of gaseous dimethyl methylphosphonate by a photocatalytic flow reaction system
Abstract

•DMMP removal by a continuous photocatalytic reaction system was investigated.•85% of the 1.7 μmol/10 L DMMP was eliminated by the photocatalytic reaction system.•74.5% of DMMP at high humidity was photooxidized to CH3PO(OH)2 and H3PO4 for 5 h.•DMMP removal was slightly observed despite low humidity and dark conditions.

Dimethyl methylphosphonate (DMMP) removal by a continuous photocatalytic reaction system at different levels of humidity (RH) was investigated for the purpose of allowing rescue operations at disaster sites over an extended period of time when applied to gas masks or other protective gear. With a high flow rate of air (10 L/min), around 85% of the 0.17 μmol/L DMMP was successfully eliminated by this photocatalytic reaction system regardless of relative humidity. On the other hand, the formation of intermediates on the TiO2 surface indicated that photocatalytic activity was dependent on relative humidity, and during a 5-h test period, the ratio of photocatalytic DMMP conversion reached 74.5% at 100% RH. DMMP adsorption onto the TiO2 surface was found to be quite strong; DMMP removal was observed despite low humidity and dark conditions

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Keywords
TiO2; Photocatalyst; DMMP; Sarin; Flow type photoreactor
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Continuous elimination of gaseous dimethyl methylphosphonate by a photocatalytic flow reaction system
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 146, March 2014, Pages 71–78
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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