Reduction of NO x in Cigarette Smoke with Perovskite-type Oxides of LaFeO 3 Family

Abstract

In order to reduce the NOx in mainstream cigarette smoke,the thermal stability,specific surface area,shape,size,catalytic activity for NO decomposition of nanoparticulate perovskite oxide(LaFe0.85Pd0.05Cu0.103) were tested by thermal gravity(TG),X-ray diffraction(XRD),nitrogen adsorption,and transmission electron microscope(TEM).By adding it into paper-making process reconstituted tobacco,the effects of LaFe0.85Pd0.05Cu0.1O3 on NOx and other harmful components in cigarette smoke were investigated.The results indicated that the specific surface area and average diameter of the oxide roasted at 700 ℃ for 2 hours were 17.24 m2/g and 50 nm,respectively,which had higher catalytic activity for NO decomposition.Comparing with the contrast,a cigarette contains 1.5% of this oxide in filler,the content of NOx in its mainstream smoke decreases by 13.0%.