%0 Journal Article %T Development of Synergic Mixed Metal Oxides for the Combined Catalytic-Absorptive Removal of Nitric Oxide from Diesel Exhaust %J Iranian Journal of Chemistry and Chemical Engineering %I Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR %Z 1021-9986 %A Salamatinia, Babak %A Ahmad Zuhairi, Abdullah %A Hashemizadeh, Iman %D 2013 %\ 03/01/2013 %V 32 %N 1 %P 31-41 %! Development of Synergic Mixed Metal Oxides for the Combined Catalytic-Absorptive Removal of Nitric Oxide from Diesel Exhaust %K Diesel exhaust %K Nitric oxide removal %K Sorbent %K Mixed oxides %K synergy %R 10.30492/ijcce.2013.5902 %X The NO removal over oxide sorbents (K2O/Al2O3 , CaO/Al2O3 and BaO/Al2O3) at a loading of up to 25 wt.% was investigated using a synthetic diesel exhaust gas containing  1,000 ppm NO, 1000 ppm iso-butane (i-C4H10), 8% O2 and N2 balance. The reactor was operated  at 250 oC to 450 oC for the activity study. NO was effectively stored (removal efficiencies between 30-60 %) as nitrate under experimental conditions after surface oxidation to NO2; and the maximum removal efficiency decreased in the order of K2O/Al2O3 (55.4 %) > BaO/Al2O3 (39.0 %) > CaO/Al2O3 (37.0 %). K2O/Al2O3 had higher mobility; but loadings higher than 15 wt.% were detrimental to the morphological properties. Despite higher basicity, CaO/Al2O3 showed  lower removal efficiency of NO compared to BaO(10)/Al2O3 due to low catalytic NO2 formation activity. Unlike K2O(10)/Al2O3, BaO(10)/Al2O3 showed increasing NO removal between 350 oC and 450 oC. K2O(5)BaO(5)/Al2O3 resulted in better surface area and volume leading to about 65 % of NO removal. This was attributed to synergic effects between physicochemical, catalytic and NO removal properties of the components.The high performance of K2O(5)BaO(5)/Al2O3  wassuccessfully elucidated based on the characteristics of the sorbent. %U https://ijcce.ac.ir/article_5902_6f071157dd6c7dfeb83eec63d21bc016.pdf