Umicore

About: Umicore is a company organization based out in Brussels, Belgium. It is known for research contribution in the topics: Catalysis & Exhaust gas. The organization has 1253 authors who have published 1516 publications receiving 23358 citations. The organization is also known as: Union Miniere.

The radiation tolerance of chalcogenide glasses

Abstract: Chalcogenide glasses are compounded from chalcogen elements, such as sulphur, selenium, and tellurium These glasses are applied to commercial applications, eg, night vision, because they transmit infrared in the spectral range of 08-16μm Chalcogenide glasses have greater advantages over germanium (Ge), ie, their wide spectral range of high transmissivity and their small temperature dependence of the refractive index We have developed the Compact Infrared Camera (CIRC) with an uncooled infrared array detector (microbolometer) for space applications The CIRC has been scheduled to launch in 2013 to demonstrate the usability of a microbolometer as a space application The optics of the CIRC adopts two different kinds of materials for athermal optics One is germanium, and the other is GASIR1® which is a chalcogenide glass (Ge 22 As 20 Se 58 ) developed by Umicore However, the radiation tolerance of GASIR® has not been investigated in the past We carried out irradiation tests to investigate the radiation tolerance of GASIR1® We irradiated GASIR1® with gamma-rays (Co60, 117 MeV and 133 MeV) up to 3Mrad We measured the transmissivity and refractive index in the infrared range before and after irradiation In this paper, we report the results of the irradiation tests of GASIR1®

Catalyst substrate having improved thermal durability

Abstract: A catalyst substrate comprises a substrate material having an inlet, an outlet, an opening therebetween to allow for the passage of exhaust gas therethrough, and further comprises a catalyst and a layer of zirconium phosphate. Catalyst substrates coated with zirconium phosphate exhibit improved thermal durability, improved thermal shock resistance, and improved alkali and acidic corrosion resistance.

Method for the regeneration of the catalytic activity of a catalyst, which is arranged in the exhaust pipe of a diesel engine and fulfills at least one oxidation function

Abstract: The process regenerates a diesel engine exhaust catalytic converter with a honeycomb structure devoid of filter function. In the process, the exhaust gas catalyst inlet temperature is raised to above 450 degrees C, incinerating the soot and hydrocarbons to at least partially regenerate the converter. The process regenerates a diesel engine exhaust catalytic converter with a honeycomb structure devoid of filter function. The honeycomb has an active coating with oxidation function and blocked by surface deposits of soot and hydrocarbons. In the process, the exhaust gas catalyst inlet temperature is raised to above 450 degrees C, incinerating the soot and hydrocarbons to at least partially regenerate the converter. The catalytic inlet temperature is raised by fuel injection, late combustion, multi-stage combustion, external heat or a burner positioned near the inlet. The catalyst is regenerated by treatment at regular intervals of between 100 and 1000 hours, or at service intervals between 500 and 15,000 km. Regeneration takes place when the catalyst carbon monoxide emissions exceed a pre-determined value. After every fifth to 50th regeneration process, the inlet temperature is raised to above 600 degrees C while the mixture is enriched for a short period with sulfates. The catalytic converter is a diesel oxidation catalytic unit, an SCR catalyst, a hydrolysis catalyst, an HC-denox catalyst or a four-way catalyst.