Investigation of exhaust emissions and ammonia flow behavior in the system incorporating with Selective Catalytic Reduction (SCR) unit is discussed. An aftertreatment designed to work without additional urea injection improve feasible temperature operating reduce size. This study focused on obtaining optimal parameters for catalysis using gaseus as reducing agent. Its effectiveness considered a...

The Selective catalytic reduction (SCR) technique is widely applied in exhaust gas after-treatment of diesel engines. Depending on operating conditions, injected urea-water solution (UWS) can form liquid films mixer blades and the pipe wall. Evaporation subsequent reactions wall film lead to deposits urea by-products, respectively. Especially that are not decomposed up high temperatures challen...

In this work, analytical solutions are provided to the nonlinear equations arising in thermal and flow-induced vibration in fluid-conveying structures using Galerkin-differential transformation method with cosine aftertreatment technique. From the analysis, it was established that increase of the length and aspect ratio of the fluid-conveying structures result in decrease the nonlinear vibratio...

the head was large and firmly fixed, and being unable to put back the protruding arm by performing podalic version, I decided upon craniotomy as the best means of delivery. After administering a full dose of liquid extract of ergot, the patient was brought under the influence of chloroform, and craniotomy was performed. After emptying the cranium, a male foetus was delivered in a few minutes. T...

Over the past decades, selective catalytic reduction (SCR) using aqueous urea sprays as ammonia precursor has become prevalent technique for NOx emission control in mobile applications. Preparation of from water still represents a challenge aftertreatment engineering complex interactions multi-phase physics and chemical reactions have to be handled. Increasingly stringent legislations ongoing d...

Monitoring automotive exhaust gas aftertreatment components is required by law as part of the on-board diagnostics (OBD). For this purpose, a novel sensor device that determines directly the catalyst conversion could be used. It consists of a single, self-heated yttria stabilized ZrO2-based disc, separating two gas atmospheres. Two identical mixed-potential electrodes yield a voltage signal by ...

Powderous crystalline materials of the composition Fe3−xMnxC have been prepared by first synthesizing Fe3C via mechanical alloying in a planetary mill followed by the addition of elemental manganese and arc-plasma melting or via the classic ceramic route in an electric furnace. The milling time for the synthesis of Fe3C was significantly reduced through adjusting the parameters of the planetary...

There are many automotive applications where complex chemistry plays an important role. For example, more stringent regulatory requirements for automobiles and trucks have led to a need to fine-tune combustors in IC engines to reduce emissions of pollutants such as NOx and introduce catalytic converter systems for aftertreatment of exhaust gases to further reduce pollutant emissions. However, m...