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Photocatalytic carbon oxidation with nitric oxide

Paper ID Volume ID Publish Year Pages File Format Full-Text
45731 46421 2015 7 PDF Available
Title
Photocatalytic carbon oxidation with nitric oxide
Abstract

•Titanium dioxide shows photocatalytic activity in carbon oxidation.•Nitrogen monoxide is an effective oxidizing agent for photocatalytic carbon oxidation.•Carbon is photocatalytically converted mainly into CO2, and NO mainly into N2.•The formal quantum efficiency of C photo-oxidation in the presence of 3000 ppm NO is 0.019.

The photocatalytic oxidation of carbon black on TiO2 using nitric oxide as an oxidizing agent was investigated. Layer-wise deposited carbon and TiO2 powder was illuminated with UVA light in the presence of NO at parts per million concentrations in dry and hydrated carrier gas at a temperature of 150 °C. Carbon was photocatalytically converted mainly into CO2, and NO mainly into N2. Carbon oxidation rates of 7.2 μg/h/mgTiO2 were achieved in the presence of 3000 ppm NO. Under these experimental conditions in the absence of molecular oxygen, formation of surface nitrates causing TiO2 photocatalyst deactivation is suppressed. Addition of water enhances surface nitrate formation and catalyst deactivation.NO and carbon particulate matter are air pollutants emitted by diesel engines. Elimination of soot collected on a diesel particulate filter through oxidation is a demanding reaction requiring temperatures in excess of 250 °C. The present study opens perspectives for a low-temperature regeneration strategy for the diesel particulate filter that simultaneously performs DeNOx reactions.

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Keywords
Titanium dioxide; Carbon; Nitrogen oxides; Photocatalytic removal; Simulated exhaust gas
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 166–167, May 2015, Pages 374–380
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us