Selective catalytic reduction filtration

In order to decrease the number of bricks in the posttreatment exhaust line, some combinations can be found such as integrating catalytic treatment and filtration step. The aim of this single brick is to reduce the overall size of the posttreatment system and to reduce the cost of the final engine. One approach to achieve this goal is to coat the soot filter with a catalyst composition effective for the conversion of NO in innocuous components. With this selective catalytic reduction filtration (SCRF) concept, the catalyzed soot filter assumes two functions removal of the particulate and conversion of the NO species to N2 of the exhaust stream (Scheme 35.6). 

The book focuses on three main themes catalyst preparation and activation, reaction mechanism, and process-related topics. A panel of expert contributors discusses synthesis of catalysts, carbon nanomaterials, nitric oxide calcinations, the influence of carbon, catalytic performance issues, chelating agents, and Cu and alkali promoters. They also explore Co/silica catalysts, thermodynamic control, the Two Alpha model, co-feeding experiments, internal diffusion limitations. Fe-LTFT selectivity, and the effect of co-fed water. Lastly, the book examines cross-flow filtration, kinetic studies, reduction of CO emissions, syncrude, and low-temperature water-gas shift. 

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