Gas monitoring instruments and systems for titanium dioxide

Titanium dioxide is the most important white pigment used in the polymer industry. It is widely used, because it efficiently scatters visible light, thereby imparting whiteness, brightness, and opacity when incorporated into a plastic product.

Titanium Dioxide is also used in modern purification techniques employing semiconductor mediated photo-oxidation of toxic substances, where it breaks down harmful volatile organic chemicals, polyaromatic hydrocarbons and nitrogen oxides.

A new development among paint, pigment and cement manufacturers is to combine these two uses of TiO2 and make paint and concrete surfaces that clean themselves with photochemical reactions. Adding activated TiO2 pigment into a paint mix helps to reduce VOC (volatile organic chemical) emissions of the painted surface. Concrete surfaces with activated TiO2 have been used to reduce traffic-related NOx levels in tunnels for instance.

In the semiconductor manufacturing industry, various perfluorinated compounds (PFCs) are used. The emissions of the PFC compounds into the ambient air are reduced by scrubbing of the exhaust gases from the process. In this process, the Gasmet™ FTIR Gas Analyzers can be used to measure the emissions into the atmosphere and also monitor the efficiency of the scrubbers. Typically monitored PFCs in the exhaust gas include carbon tetrafluoride CF4, trifluoromethane CHF3, and hexafluoroethane C2F6.