Investigations on ammonia selective catalytic reduction of nitric oxides process in self ignition engine exhausts gases

Aim of project
The aim of the project is elaboration, realization and investigation on reactors models for Selective Catalytic Reduction of nitric oxides by use of ammonia in self ignition engine exhaust gases. Investigations will be done on reactor models covered with different platinum loads, oxide reactor and modular platinum-oxide reactors with different platinum loads. Investigations will be carried out with different dosage of redactor (NH3) to the engine exhaust pipe in different reactor work temperatures. There will be determinate NOX reduction activation energies on platinum and oxide reactors and also there will be conducted simulations of NOX conversion process. Project scientific aims are: - recognition on catalytic properties of platinum and oxide active layers and also experimental estimation of activation energy in NOX reduction process, - determination of NOX 50% conversion temperature for reactors with platinum, oxide and modular platinum-oxide layers with different platinum loads and also estimation of their high activity temperatures ranges, - active layers selection of modular reactor models which will ensure wide high activity temperature range (150-550ºC), - recognition and documentation of physical-chemical structure of SCR reactors with platinum and oxide active layers, - elaboration of construction technology basis for SCR reactors with platinum, oxide and modular platinum-oxide layers in cooperation with experts from chemical technology field, - estimation of optimal redactor doses which will allow to achieve highest NOX conversion with lowest NH3 emission.

Expected results
Final effects of investigations carried under project will be: - elaboration of modular platinum-oxide NH3-SCR reactor model achieving high NOX conversion levels in possibly wide catalytic process temperature ranges and estimation of his catalytic properties in temperature range typical for reactors working in self ignition engine exhaust gases (150-550ºC), - elaboration of guidelines for reductor dosage which will allow to achive high levels of NOX reduction with lowest NH3 emission, - elaboration of guidelines for building full scale, utilitary catalityc NH3-SCR system containing hydrolizing reactor, elaborated under project reactor for NOX reduction and standard oxidizing reactor (Pt/Al2O3) which will oxide excess of NH3.