활성탄소의 산-염기 표면처리에 따른 N2, CO2 및 NH3- 흡착거동

박수진; 김기동; 이재락

Journal of the Korean Industrial and Engineering Chemistry, Vol.9, No.6, 920-923, November, 1998

Export Citation

활성탄소의 산-염기 표면처리에 따른 N₂, CO₂ 및 NH₃- 흡착거동

N₂, CO₂ and NH₃-Adsorption Behaviors of Activated Carbons on Acid and Base Surface Treatments

박수진, 김기동, 이재락

초록

본 연구에서는 활성탄소를 산성 및 염기성 용액으로 처리하여 pH변화에 따른 흡착 특성을 비교 분석하였다. 처리하지 않은 일반 활성 탄소와 30 wt. % HCl 및 30 wt. % NaOH 용액으로 처리된 활성탄소의 표면 산도 및 표면 염기도를 Boehm의 선택 중화법을 이용하여 측정하였으며, 그 흡착표면적과 기공도 등은 BET 법을 이용한 N₂ 기체 흡착을 통해 알아보았다. 또한 산, 염기 처리된 활성탄소의 흡착 특성을 비교하기 위해 CO₂ 및 NH₃기체의 흡착 실험을 수행하였다. 그 결과 일반 활성탄소와 산성 또는 염기성 용액으로 각각 처리된 활성탄소의 물리적인 표면구조는 큰 변화를 나타내지 않았으나, CO₂ 및 NH₃에서의 흡착에 있어서 화학적 처리에 따른 서로 다른 표면 관능기에 의하여 상대적으로 향상된 흡착 거동을 나타내었다.

In this work, the adsorption characteristics of the activated carbon treated with 30 wt. %HCl and 30 wt. % NaOH were investigated. The acid and base values were determined by Boehm's method and the surface area and porosity was measured by BET-method with N₂-adsorption. Also, the adsorption characteristics of the activated carbons treated with acid and base chemical solutions were investigated with CO₂ and NH₃-adsorption. From which, relatively different adsorption behaviors of the modified activated carbons were observed in the amounts of CO₂ and NH₃ adsorptions, even though the physical surface structures of the activated carbons, such as specific surface area, pore size and pore volume, were not significantly changed.

Keywords:Adsorption;Activated Carbon;Chemical Treatment;Sufrace Properties

[References]

Bansal RC, Donnet JB, Stoeckli F, "Active Carbon," Marcel Dekker, New York (1988)
Chan WC, Die Angew. Makro. Chem., 213, 3724 (1993)
Lowell S, Shields JE, "Powder Surface Area and Porosity," Chapman & Hall, London (1993)
Park SJ, Donnet JB, J. Colloid Interface Sci., 200(1), 46 (1998)
Donnet JB, Zin RY, Park SJ, Ryu SK, Rhee BS, J. Mater. Sci., 28, 2950 (1993)
Barton SS, Evans MJB, Hallilop E, Macdonnald JAF, Carbon, 35, 1361 (1997)
Biniak S, Szymanski G, Siedlewski J, Swiatkowski A, Carbon, 35, 12 (1997)
Leon CA, Leon Y, Solar JM, Calemma V, Radovic LR, Carbon, 30, 797 (1993)
Boehm HP, Heck W, Sappok R, Angew. Chem., 76, 742 (1964)
Brunauer S, Emmett PH, Teller E, J. Am. Chem. Soc., 60, 309 (1938)
Dubinin MM, "Progress in Surface and Membrane Science," Academic Press, New York (1975)
Park SJ, Brendle M, J. Colloid Interface Sci., 188(2), 336 (1997)
Jaroniec M, Madey R, "Physical Adsorption on Heterogeneous Solids," Elsevier, Amsterdam (1988)

[Referenced By]

[1] Bansal RC, Donnet JB, Stoeckli F, "Active Carbon," Marcel Dekker, New York (1988)

[2] Chan WC, Die Angew. Makro. Chem., 213, 3724 (1993)

[3] Lowell S, Shields JE, "Powder Surface Area and Porosity," Chapman & Hall, London (1993)

[4] Park SJ, Donnet JB, J. Colloid Interface Sci., 200(1), 46 (1998)

[5] Donnet JB, Zin RY, Park SJ, Ryu SK, Rhee BS, J. Mater. Sci., 28, 2950 (1993)

[6] Barton SS, Evans MJB, Hallilop E, Macdonnald JAF, Carbon, 35, 1361 (1997)

[7] Biniak S, Szymanski G, Siedlewski J, Swiatkowski A, Carbon, 35, 12 (1997)

[8] Leon CA, Leon Y, Solar JM, Calemma V, Radovic LR, Carbon, 30, 797 (1993)

[9] Boehm HP, Heck W, Sappok R, Angew. Chem., 76, 742 (1964)

[10] Brunauer S, Emmett PH, Teller E, J. Am. Chem. Soc., 60, 309 (1938)

[11] Dubinin MM, "Progress in Surface and Membrane Science," Academic Press, New York (1975)

[12] Park SJ, Brendle M, J. Colloid Interface Sci., 188(2), 336 (1997)

[13] Jaroniec M, Madey R, "Physical Adsorption on Heterogeneous Solids," Elsevier, Amsterdam (1988)