Brigitte Konrad

TL;DR: In this paper, the kinetics of NH 3 adsorption-desorption and of the NO + NH 3 / O 2 Selective Catalytic Reduction (SCR) reaction were studied in the 50-450°C T -range in the presence of water over a commercial powdered V 2 O 5 -WO 3 / TiO 2 catalyst loaded in a micro-reactor, following the temporal evolution of the outlet species concentrations by a mass spectrometer.

TL;DR: In this paper, a method and apparatus for purifying an exhaust gas of an internal combustion engine includes an ammonia generating catalyst for generating ammonia from nitrogen oxides contained in the exhaust gas to be purified, and a nitrogen oxide reducing catalyst downstream of the ammonia generating catalysts for reduction of nitrogen oxide contained in exhaust gas.

TL;DR: In this paper, a method of cleaning an exhaust gas from a combustion system that is operated alternately in lean and rich conditions is described, with the goal of reducing nitrogen oxides in a subsequent lean condition.

TL;DR: In this article, an internal combustion engine is operated with a lean mixture and a rich mixture, and an exhaust-gas aftertreatment device, which includes a nitrogen oxide storage catalytic converter and a particle filter.

TL;DR: In this paper, a method for operating an internal combustion engine using exhaust gas purification system, and internal combustion engines, is presented, in which a rich mode of the internal combust engine with a rich exhaust gas composition and a lean mode of internal combustion Engine with a lean exhaust gas compositions are set alternately, and a rich or lean exhaustgas composition is set by at least one afterinjection.