Mn-Ce-Fe-Al mixed oxide nanoparticles via a high shear mixer facilitated coprecipitation method for low temperature selective catalytic reduction of NO with NH3

Mn-Ce-Fe-Al mixed metal oxide nanoparticles were produced via a co-precipitation method by using a high-speed mixer, and used as a catalyst for SCR reactions with NH3. The Mn-Ce-Fe-Al (HSM-CP) catalyst achieved a good physical structure with a BET surface area of approximately 224.3 m(2)/g, a pore volume of about 0.49 cm(3)/g, and an average pore diameter of about 8.89 nm. The Mn-Ce-Fe-Al (HSM-CP) processed more oxygen vacancies to promote catalytic activity at low temperature. The as-obtained Mn-Ce-Fe-Al (HSM-CP) had an enhanced low temperature selective catalytic reduction of NO with NH3 of 100% and N-2 selectivity of 96.5% at 150 degrees C with a gas hourly space velocity of 15,300 h(-1). The product still kept 50% NO conversion even at room temperature. The Mn-Ce-Fe-Al (HSM-CP) catalyst was effective at reducing the ammonia escape ratio across the entire temperature regime of the SCR reaction due to its strong surface acidity. The Mn-Ce-Fe-Al (HSM-CP) delivered almost zero N2O selectivity below 150 degrees C and presented potential applications in stationary industrial installations for environment friendly ultra-low temperature SCR.