한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제44권6호
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  • Pages.325-330
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  • 2007
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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Al2(SO4)3와 Na2SO4 혼합용액의 가수분해에 의한 고기공 AlO(OH) 겔의 합성에서 pH가 기공특성에 미치는 영향

Effect of pH on Pore Characteristics in Synthesis of High Porous AlO(OH) Gel by Hydrolysis of Al2(SO4)3 and Na2SO4 Mixed Solution

  • 박병기 (한국화학연구원 에너지소재연구센터) ;
  • 최동욱 (한국화학연구원 에너지소재연구센터) ;
  • 이재락 (한국화학연구원 에너지소재연구센터)
  • Park, Byung-Ki (Energy Materials Research Center, Korea Research Institute of Chemical Technology) ;
  • Choe, Dong-Uk (Energy Materials Research Center, Korea Research Institute of Chemical Technology) ;
  • Lee, Jae-Rock (Energy Materials Research Center, Korea Research Institute of Chemical Technology)
  • 발행 : 2007.06.30
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초록

High porous AlO(OH) gel is used in precursor of ceramic material, coating material and porous catalyst. For use of these, not only physiochemical control for particle morphology, pore characteristic and peptization but also studies of synthetic method for preparation of high porous AlO(OH) gel were required. In this study, high porous AlO(OH) gel was prepared through the aging and filtration process of aluminum hydroxides gel precipitated by the hydrolysis reaction of $Na_2CO_3$ solution and $Al_2(SO_4)_3$ and $Na_2SO_4$ mixed solution. In this process, optimum synthetic condition of AlO(OH) gel having excellent pore volume as studying the effect of hydrolysis pH on gel precipitates has been studied. Hydrolysis pH brought about numerous changes on crystal morphology, surface area, pore volume and pore size. Physiochemical properties of gel were investigated as using XRD, TEM, TG/DTA, FT-IR and $N_2$ BET method.

키워드

참고문헌

  1. R. K. Oberlander, 'Aluminas for Catalysts-Their Preparation and Properties,' Appl. Ind. Catalysis, 3 63-110 (1984)
  2. P. Nortier and M. Soustelle, 'Alumina Carriers for Automotive Pollution Contro,' Catalysis and Automotive Pollution Control, ed. by Crucq and A. Frennet, Elsevier Sci. Pub. 275-300 (1987)
  3. R. B. Bagwell and G. L. Messing, 'Critical Factor in the Production of Sol-Gel Derived Porous Alumina,' Key Eng. Mater., 115 45-64 (1996) https://doi.org/10.4028/www.scientific.net/KEM.115.45
  4. C. Misra, 'Aluminum Oxide (Hydrate),' Encyclopedia of Chem. Tech., 4th ed., 2 317-330 (1992)
  5. L. K Hudson, C. Misra and K. Wefers, 'Aluminum Oxide, Ullmann's Encyclopedia of Ind. Chem., 5th ed., Al 557-594 (1985)
  6. B. C. Lippens and J. J. Steggerda, 'Active Alumina,' Physical and Chemical Aspects of Adsorbents and Catalysts, 4 171-211 (1970)
  7. R. Dale Woosley, 'Activated Alumina Desiccants,' Alumina Chemicals, 2nd ed. Am. Ceram. Soc., 241-50 (1990)
  8. W. A. Deer, R. A. Howie and J. Zussman, 'Rock Forming Minerals,' Longmans, London, 5 111-116 (1969)
  9. L. Farkas, P. Gado and P. E. Wermer, Mat Res. Bull., 12 1213-18 (1977) https://doi.org/10.1016/0025-5408(77)90176-3
  10. B. K. Park, J. K. Suh, J. M. Lee and D. S. Suhr, 'The Rehydration Properties of Amorphous Alumina Powder in Low Water/Alumina Ratio(in Korean),' J. Kor. Ceram. Soc., 35 [10] 1085-93 (1998)
  11. S. Ram, 'Infrared Spectral Study of Molecular Vibrations in Amorphous, Nanocrystalline and AlO(OH)${\cdot}{\alpha}$H2O Bulk Crystals,' Infrared Physics & Technology 42 547-560 (2001) https://doi.org/10.1016/S1350-4495(01)00117-7
  12. K. H. Lee and B. H. Ha, 'Preparation and Characteristic for $\gamma$-Alumina,' J. Kor. Institute. Chem. Eng., 34 [1] 28-35 (1996)
  13. U.S Patent: 4,391,740 (1983)
  14. B. K. Park, J. K. Suh, J. M. Lee and D. S. Suhr, 'Preparation of High-apacity Ceramic Catalytic Support from Gibbsite(in Korean)' J. Kor. Ceram. Soc., 39 [3] 245-51 (2002) https://doi.org/10.4191/KCERS.2002.39.3.245
  15. Z. J. Galas, S. Janiak, W. Mista, J. Wrzyszcz and M. Zawadzki, 'Morphological and Phase Changes of Transition Aluminas during their Rehydration,' J. Mat. Sci., 28 2075- 78 (1993) https://doi.org/10.1007/BF00367564
  16. B. K. Park, J. M. Lee and D. S. Suhr, 'Preparation of $Fe_2O_3$ Supported $\gamma$-Alumina Catalyst by Hydrothermal Method(in Korean),' J. Kor. Ceram. Soc., 40 [7] 683-89 (2003) https://doi.org/10.4191/KCERS.2003.40.7.683
  17. B. K. Park, J. M. Lee and D. S. Suhr, 'Effect of $CH_3COOH$ Concentration on Characteristics of $Fe_2O_3$ Supported $\gamma$-Alumina Catalyst by Hydrothermal Method(in Korean),' J. Kor. Ceram. Soc., 40 [8] 758-64 (2003) https://doi.org/10.4191/KCERS.2003.40.8.758
  18. B. K. Park, J. K. Suh and J. M. Lee, 'Decomposition Characteristics of Aniline Treated in $Fe_2O_3$ Supported $\gamma$-Alumina Catalyst and $O_3$ (in Korean),' J. Kor. Ceram. Soc., 42 [4] 237-44 (2005) https://doi.org/10.4191/KCERS.2005.42.4.237
  19. D. U. Choe, B. K. Park and J. M. Lee, 'Effect of Water and Aluminum Sulfate Mole Ratio on Pore Characteristics in Synthesis of AlO(OH) Nano Gel by Homogeneous Precipitation( in Korean),' J. Kor. Ceram. Soc., 43 [9] 564-68 (2006) https://doi.org/10.4191/KCERS.2006.43.9.564
  20. D. U. Choe, B. K. Park, J. K. Suh and J. M. Lee, 'Effect of Aging Time of AlO(OH) Gel Precipitated by Hydrolysis of Aluminum Sulfate on Crystal Growth of the Flaky ${\alpha}- Al_2O_3$(in Korean),' J. Kor. Ceram. Soc., 43 [9] 575-81 (2006) https://doi.org/10.4191/KCERS.2006.43.9.575