Detection of HO2Radicals in the Photocatalytic Oxidation of Methyl Ethyl Ketone

2008 ◽  
Vol 112 (7) ◽  
pp. 2239-2243 ◽  
Author(s):  
Jérôme Thiebaud ◽  
Alexander Parker ◽  
Christa Fittschen ◽  
Guillaume Vincent ◽  
Orfan Zahraa ◽  
...  
Keyword(s):  
Methyl Ethyl Ketone ◽  
Photocatalytic Oxidation ◽  
Methyl Ethyl

Photocatalytic oxidation of methyl ethyl ketone over sol-gel and commercial TiO2 for the improvement of indoor air

2006 ◽  
Vol 53 (11) ◽  
pp. 107-115 ◽  
Author(s):  
C. Raillard ◽  
V. Héquet ◽  
P. Le Cloirec ◽  
J. Legrand
Keyword(s):  
Methyl Ethyl Ketone ◽  
Indoor Air ◽  
Photocatalytic Oxidation ◽  
Degradation Kinetics ◽  
Sol Gel ◽  
Degradation Pathway ◽  
Air Pollutant ◽  
Methyl Ethyl ◽  
Fixed Temperature ◽  
Glass Plates

This work focuses on the photocatalytic oxidation of gaseous methyl ethyl ketone chosen as a typical indoor air pollutant. Two types of TiO2 coatings were prepared and deposited on glass plates: one using the commercial Degussa P25 TiO2 and the other one by sol-gel method. The first objective of this study was to compare different ways of preparing thin films of sol-gel TiO2 coated on glass plates, taking into account their general aspect and their photocatalytic efficiency. Several parameters were tested, such as the stabilising agent, the glass type of the support, the number of coatings and the calcination temperature. One of the synthesised materials was then kept to carry out the following study. The study aimed to assess the influence of TiO2 coating types on the effect of water vapour. This was achieved by performing MEK photocatalytic degradation kinetics under two levels of humidity at a fixed temperature. Experimental results were then modelled by the Langmuir-Hinshelwood equation. The obtained parameters gave specific trends in function of the considered catalyst. The second part of this work was to identify MEK degradation byproducts during its photocatalytic oxidation. The main detected intermediate was acetaldehyde, followed by methyl formate. A MEK degradation pathway was then proposed.

Heterogeneous photocatalytic oxidation of methyl ethyl ketone under UV-A light in an LED-fluidized bed reactor

2014 ◽  
Vol 230 ◽  
pp. 79-84 ◽  
Author(s):  
Mohammad Hajaghazadeh ◽  
Vincenzo Vaiano ◽  
Diana Sannino ◽  
Hossein Kakooei ◽  
Rahmat Sotudeh-Gharebagh ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Methyl Ethyl Ketone ◽  
Photocatalytic Oxidation ◽  
Fluidized Bed Reactor ◽  
Methyl Ethyl

Comparison of different TiO2 photocatalysts for the gas phase oxidation of volatile organic compounds

2004 ◽  
Vol 50 (4) ◽  
pp. 241-250 ◽  
Author(s):  
C. Raillard ◽  
V. Héquet ◽  
P. Le Cloirec ◽  
J. Legrand
Keyword(s):  
Volatile Organic Compounds ◽  
Methyl Ethyl Ketone ◽  
Organic Compounds ◽  
Indoor Air ◽  
Photocatalytic Oxidation ◽  
Kinetic Studies ◽  
Methyl Ethyl ◽  
Low Concentrations ◽  
Volatile Organic ◽  
Indoor Air Pollutants

Gas-solid photocatalyzed oxidation of air contaminants is being explored more and more for possible application to decontamination, purification and deodorization of enclosed atmospheres. Indoor air is characterized by a huge number of pollutants at low concentrations. Volatile organic compounds (VOC) represent the main indoor air pollutants category, and are of great concern since some of them can act negatively on human health. Several treatments exist to reduce VOC concentrations in gaseous effluents, but photocatalytic oxidation appears to be the most appropriate regarding indoor air specific constraints. It is then necessary to develop photocatalysts, which can possibly be used in an application such as indoor air-quality improvement. In the present work, three different TiO2-based materials were studied and compared for the photocatalytic oxidation of a typical pollutant of indoor air: methyl ethyl ketone. Kinetic studies were performed for each material in dry and humid air conditions, and the Langmuir-Hinshelwood model was satisfactorily applied in almost every case. A second approach consisted of determining methyl ethyl ketone degradation by-products. Acetaldehyde was found to be the main gaseous intermediate, and could be taken into account in the general Langmuir-Hinshelwood modeling.

Highly efficient synthesis of methyl ethyl ketone oxime through ammoximation over Ti-MOR catalyst

2014 ◽  
Vol 34 (1) ◽  
pp. 243-250
Author(s):  
Jianghong DING ◽  
Le XU ◽  
Hao XU ◽  
Haihong WU ◽  
Yueming LIU ◽  
...  
Keyword(s):  
Methyl Ethyl Ketone ◽  
Methyl Ethyl ◽  
Efficient Synthesis ◽  
Highly Efficient

Electroinduced oxidative copolymerization ofN-vinyl carbazole with methyl ethyl ketone formaldehyde resin

2004 ◽  
Vol 15 (7) ◽  
pp. 365-369 ◽  
Author(s):  
Belkıs Ustamehmetoğlu ◽  
A. Sezai Saraç ◽  
Nilgün Kızılcan ◽  
Ahmet Akar
Keyword(s):  
Methyl Ethyl Ketone ◽  
Formaldehyde Resin ◽  
Methyl Ethyl ◽  
Oxidative Copolymerization
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