Activated carbon and petroleum

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Asked at 2022-01-18 22:16:53

Combined with unique flue gas generator and gas circuit switching and high rate of dilution technology, established a new type of impact based on the online detection of cigarette smoke aerosol particle size distribution of test method and the device, when implemented by suction mouth fresh smoke aerosol particle size size, concentration and distribution state of real-time detection, to evaluate the new additives, Cigarette auxiliary materials provide a new method for analyzing the effects of aerosol particles in smoke. After observing the stability of the device and the repeatability of the method, the aerosol particle size distribution characteristics of several activated carbon cigarette smoke were detected by using this method. It was found that the addition of activated carbon could effectively reduce the particulate matter content in the mainstream cigarette smoke, but had little effect on the particulate matter distribution state. The specific surface area and pore size distribution of activated carbon have a certain influence on the number concentration of aerosol particles. The higher the specific surface area, the stronger the adsorption capacity, and the less the number of particles. When the specific surface area is similar, the pore size distribution has an important effect, and the activated carbon with larger pore content is more favorable for the filtration of flue gas particles. The particle number concentration of seven samples of flue gas aerosol particles above 99% was concentrated in the range of 0.007~ 0.948um particle size, and the mass concentration was concentrated in the range of 0.262~ 9.910um particle size. Both particle number concentration and mass concentration showed an upward trend with the number of suction ports. The average particle number concentration of mainstream flue gas aerosol was 6.46×108~8.86×10° /cm' per puff, and the average mass concentration was 3.13×10+~ 3.85×10' mg/m' per puff. The total particle number concentration in a single cigarette was 3.88×109~5.31×10° /cm3. The total mass concentration ranged from 1.88×105 to 2.31×105mg/m3.imagitarium activated carbon pellets  

In order to further understand the effect of the pore structure of activated carbon on the filtration efficiency of cigarette mainstream smoke and the difference of the filtration efficiency between gaseous compounds and granular compounds, the adsorption selectivity of activated carbon on two important harmful components (sputum-based compounds and phenolic compounds) in cigarette mainstream smoke was also investigated. It was found that there was a significant correlation between the filtration efficiency of seven phenolic substances in the mainstream smoke of cigarettes and the filtration efficiency of particulate matter. The filtration efficiency of activated carbon for several monophenols was significantly higher than that of bisphenol, in which o-cresol had the highest filtration efficiency, followed by phenol. Activated carbon has a better adsorption effect on sputum-based compounds in the mainstream smoke of cigarettes. The larger the specific surface area of activated carbon is, the higher the filtration efficiency is. When the specific surface area is similar, the smaller pore size of activated carbon has a higher filtration efficiency. The activated carbon has the highest filtering efficiency for crotonaldehyde and the lowest filtering efficiency for acetaldehyde. The filtration efficiency of activated carbon for gas phase composition was significantly higher than that for granular phase composition. When the addition amount of activated carbon for six different pore structures was 23 mg/ branch, the total granular phase could be reduced by 3.75%-12.49%. The total phenolic compounds could be reduced by 2.92% ~ 13.68%. The total amount of sputum-based compounds could be reduced by 9.51% ~ 35.05%. 


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