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通过柠檬酸凝胶-浸渍法制备了具有介孔结构的纳米La_(0.8)K_(0.2)FeO_3和La_(0.8)K_(0.2)Fe_(0.97)Pt_(0.03)O_3催化剂,并利用XRD、SEM和BET对其性能进行表征。基于台架试验,研究了温度对纳米La_(0.8)K_(0.2)FeO_3和La_(0.8)K_(0.2)Fe_(0.97)Pt_(0.03)O_3催化剂同时脱除柴油机NO_x和碳烟排放的影响。结果表明,在温度150~350℃范围内,La_(0.8)K_(0.2)Fe_(0.97)Pt_(0.03)O_3作用下NO_x转化率较高;在温度350~400℃范围内,La_(0.8)K_(0.2)FeO_3作用下NO_x转化率较高,最高达27.5%。此外,在催化剂作用下副产物N_2O排放也得以降低。
The mesoporous nanocrystalline La_ (0.8) K_ (0.2) FeO_3 and La_ (0.8) K_ (0.2) Fe_ (0.97) Pt_ (0.03) O_3 catalysts were prepared by citric acid gel impregnation method and characterized by XRD, And BET to characterize its performance. Based on the bench test, the effect of temperature on the simultaneous removal of NO x and soot from La0.8 0.8 K0.2O0.0 0.97 Pt0.03 O3 catalyst was investigated. The results showed that the conversion rate of NO_x was higher under the condition of La 0.8 K 0.2 Fe 0.97 Pt 0.03 O 3 at the temperature of 350-300 ℃, Under the action of K_ (0.2) FeO_3, the NO_x conversion rate is high, up to 27.5%. In addition, N2O emissions by-products are also reduced by the catalyst.