Studies on transition metals modified porous materials for reducing hydrocyanic acid in cigarette smoke
In this study, different transition metals such as Zn, Co, Fe, Cu modified HZSM-5 and SBA15 materials have been prepared by impregnation method for the reducing hydrocyanic acid in cigarette smoke. The porous materials were characterized by powder X-ray diffraction (XRD) and N2 sorption isotherms. The characterization results showed that most transition metal oxides were well dispersed on HZSM-5 or SBA-15. The different supports, transition metal oxides and the amount of those were investigated using the model reactor in detail. SBA-15 loading 5%mol CuO was found to be most effective for reducing hydrocyanic acid in cigarette smoke. The effects for decreasing hydrocyanic acid in cigarette smoke were investigated using a dual-filter cigarette. Compared to the control cigarette, the released amount of hydrocyanic acid for experimental sample reduced by about 23.0. While the nicotine and tar deliveries were almost the same, indicating that this material had good selective filtration behavior for decreasing hydrocyanic acid in cigarette smoke. Moreover, the taste of the experimental sample was similar to the control cigarette.