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Photocatalytic treatment of indoor air: Optimization of 2-propanol removal using a response surface methodology (RSM)

Paper ID Volume ID Publish Year Pages File Format Full-Text
47698 46480 2010 8 PDF Available
Title
Photocatalytic treatment of indoor air: Optimization of 2-propanol removal using a response surface methodology (RSM)
Abstract

This paper presents an experimental design methodology for the optimization of the photocatalytic removal of 2-propanol also called isopropyl alcohol (IPA) at indoor air concentration level (ppbv). The response surface methodology (RSM) for the modelization and optimization of the photodegradation of 2-propanol in the presence of titanium dioxide was used. The effect of four different process parameters on the yield of 2-propanol mineralization was determined. Experiments were performed using an annular flow-through reactor with TiO2 as photocatalyst, 2-propanol as a volatile organic compound (VOC) model, under different ranges of relative humidity (RH: 0–60%), inlet concentration (100–700 ppbv) and flow rate (100–500 mL min−1), TiO2 loading (5–20 g m−2). Analysis of reaction intermediates was conducted using an automated thermal desorption technique coupled with gas chromatography–mass spectrometry (ATD–GC–MS) whereas a gas chromatograph equipped with a pulsed discharge helium photoionization detector (GC–PDHID) was used for on-line measurements of CO and CO2 at ppbv level. RH was found as the principal parameter that affect significantly the mineralization and the formation of acetone, the principal reaction intermediate from the photocatalytic oxidation of 2-propanol. For example an immediate and total removal of 2-propanol at very low % of RH along with a high rate of mineralization without any by-products was found. Many strong interactions between the parameters were also found ([2-propanol]–flow rate, RH–[TiO2], [2-propanol]–RH). The model obtained (R2 = 0.9965) shows a satisfactory correlation between the values of experimental data and predicted values of 2-propanol mineralization (CO2).

Keywords
Photocatalysis; TiO2; 2-Propanol; Indoor air; RSM
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Photocatalytic treatment of indoor air: Optimization of 2-propanol removal using a response surface methodology (RSM)
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 94, Issues 3–4, 10 February 2010, Pages 303–310
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