Oven, self-cleaning

Cerium is a component of misch metal, which is extensively used in the manufacture of pyrophoric alloys for cigarette lighters. While cerium is not radioactive, the impure commercial grade may contain traces of thorium, which is radioactive. The oxide is an important constituent of incandescent gas mantles and is emerging as a hydrocarbon catalyst in self cleaning ovens. In this application it can be incorporated into oven walls to prevent the collection of cooking residues. 

Cerium(IV) oxide is used to coat interior surfaces of self-cleaning ovens, where it prevents the build-up of tar deposits. 

Some application areas of gas sensors are described in chapter 5.3, including gas and fuel powered domestic burner control, air quality sensing, indoor detection of CO, and natural gas detection. Several further applications of gas sensors are still in the development stage, e.g. for cooking and frying control, or for controlling the self-cleaning procedure (pyrolysis) of ovens. 

In this sub-chapter we intend to give an overview of household appliances using the different gas sensor principles mentioned in the previous chapters. The appliances can be divided into two categories gas sensors for safety and for comfort. Natural gas and CO-alarm systems for example are safety-relevant whereas air quality measurement, control of self-cleaning of ovens etc. are more or less a matter of comfort or energy-saving. 

Many appliances for gas sensors in households are still under development. For example, several attempts have been made in the past to include gas sensors in kitchen ovens to control cooking and frying processes as well as to control the self-cleaning process (pyrolysis). 

The control of the self-cleaning procedure (pyrolysis) of especially equipped kitchen ovens is another focus of development. The underlying idea is to burn the organic residues at elevated temperatures (around 400 °C) and to detect the emerging volatile compounds. In order to minimize energy consumption, the process time should be kept as short as possible. During this process considerable amounts of CO and C02 are released. A decrease in concentration of these compounds can thus be taken is an indicator of the end of process. The most direct method would be the detection of C02 in the flue gas. The most common C02-... 

Swedish chemist Jons Jackob Berzelius, German chemists Wilhelm von Hisinger and Martin Klaproth Most abundant of the rare earths named for an asteroid compounds and oxides used in lighting, self-cleaning ovens, cameras, telescopes. 

In spite of this, we believe that there is a real potential in ceria as an anode for conversion of hydrocarbon fuels, because ceria can tolerate carbon precipitation and is able to oxidise the carbon. In this context it should be remembered that one of the oldest applications of ceria has been as a carbon oxidation catalyst, and still today it is used as a catalyst in self cleaning ovens and for the oxidation of diesel soot in automobiles. ... 

Numerous UFP sources exist within homes in addition to cooking sources. In the homes of non-smokers, other significant sources of UFP include air fresheners, cleaning products, burning candles and incense. Additionally, the self-cleaning oven feature and gas and electric burners found on most residential ovens and stoves have been shown to produce significant amounts of UFP. Table 2 presents maximum concentrations of UFP observed while studying common sources found in homes. 

Cerium oxide is an important constituent of incandescent gas mandes. Its use as hydrocarbon catalysts in self-cleaning ovens is becoming more and more important (Hammond 2015). 

Although these days many people have "self-cleaning" ovens, if your oven gets really dirty you may have to resort to one of the spray-on oven cleaner preparations sold in supermarkets. What evidence is there that such oven cleaners work by a chemical reaction ... 

Self-cleaning oven General Electric introduces the self-cleaning electric oven. 

Self-cleaning Enamel. Vitreous enamels which contain components designed to promote oxidation of grease and oven spills during use. 

In so-called self-cleaning ovens cerium oxide is incorporated into the walls and catalyzes the oxidation of cooking residues. Cerium also has catalytic functions in the production of some organic chemicals, such as styrene from methylbenzene. 

Organic contaminants in clean glass jars can generally be eliminated by one cycle through a self-cleaning oven. 

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