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Iranian Journal of Chemistry and Chemical Engineering، جلد ۳۲، شماره ۱، صفحات ۳۱-۴۱
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عنوان انگلیسی Development of Synergic Mixed Metal Oxides for the Combined Catalytic-Absorptive Removal of Nitric Oxide from Diesel Exhaust
چکیده انگلیسی مقاله 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.
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نویسندگان مقاله بابک salamatinia |
discipline of chemical engineering, school of engineering, monash university sunway campus, jalan lagoon selatan, 46150 bandar sunway, selangor, malaysia

عبدالله احمد zuhairi | ahmad zuhairi
school of chemical engineering, engineering campus, university sains malaysia, 14300, nibong tebal, penang, malaysia

ایمان هاشمی زاده |
school of chemical engineering, engineering campus, university sains malaysia, 14300, nibong tebal, penang, malaysia

نشانی اینترنتی http://www.ijcce.ac.ir/article_5902_6f071157dd6c7dfeb83eec63d21bc016.pdf
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