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Study on Modification of Activated Carbon and Its Adsorption Properties of Formaldehyde

Author: ZuoLiWei
Tutor: DingTong
School: Tianjin University
Course: Industrial Catalysis
Keywords: Activated Carbon Modified Formaldehyde Adsorption
CLC: X51
Type: Master's thesis
Year: 2008
Downloads: 375
Quote: 3
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Abstract


Formaldehyde gas in indoor air is a common indoor pollutants , seriously endangering the health of the human body , and genotoxicity and carcinogenicity . In recent years, the removal of formaldehyde and other indoor gas become a hot research . In this study, the dynamic fixed - bed experimental apparatus adsorbent material adsorption of formaldehyde experiment , focusing on the adsorption properties of modified activated carbon for formaldehyde to explore the impact of formaldehyde molecules adsorbed factors . The main contents and conclusions are as follows : 1 . Effects of activated carbon , γ -Al 2 O 3 , molecular sieve adsorbent different categories of formaldehyde adsorption performance results show that the activated carbon adsorption properties of formaldehyde was significantly better than the other sorbents experiments confirmed the large specific surface area is conducive to the adsorption of formaldehyde molecules , in order to determine the activated carbon as the object of study investigated the performance of its modified adsorption of formaldehyde . Investigated formaldehyde adsorption performance of activated carbon on the four modified method , found that modified activated carbon for formaldehyde adsorption performance has improved to varying degrees , which 0.5mol / L NaOH modified activated carbon for formaldehyde best adsorption 7.543mg/gAC, is 3.67 times that of the unmodified adsorption properties ; TPD experiment made ??to the sample , the peak area of ??the modified activated carbon has increased , the desorption temperature of Formaldehyde concentrated at about 270 ℃ ; the characterization found by the BET modified samples , pore diameter , and is closely related than the amount of adsorption of the surface area with formaldehyde . 3 investigated 0.1mol / L Cu (NO3) 2 modified activated carbon regeneration adsorption properties of the formaldehyde , regeneration experimental results showed that good reproduction performance of the sample , can be reused many times .

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Atmospheric pollution and its control
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