The effect of seeding on crystal growth of NaX zeolite

NaX zeolite의 결정성장에서 seed 첨가에 따른 영향

  • 하종필 (한서대학교 재료공학과 무기재료 공정연구소) ;
  • 김익진 (한서대학교 재료공학과 무기재료 공정연구소)
  • Published : 1999.02.01

Abstract

NaX zeolite crystal were grown from seed elements of synthetic NaX(2~3$\mu\textrm{m}$) Powder in a mother liquor having an approximate reactant composition ${4.12{Na}_{2}O{\cdot}{Al}_{2}{O}_{3}{\cdot}3.5{SiO}_{2}{\cdot}593{H}_{2}O$.The result was that crystallization time of NaX zeolite was reduced with adding seed materials to the initial mixture and crystal size was reduced . but with increasing crystallization time, NaX zeolite. In this study, We investigated detailed factors which NaX crystal has been determined by a combination of SEM, XRD, FT-IR, and BET.

NaX zeolite 결정을 성장시키기 위하여 ${4.12{Na}_{2}O{\cdot}{Al}_{2}{O}_{3}{\cdot}3.5{SiO}_{2}{\cdot}593{H}_{2}O$의 몰비를 가진 모액에 합성된 NaX powder(1~2$\mu\textrm{m}$)를 seed를 첨가하였다. 그 결과 초기 혼합물에 seed를 첨가하므로 결정화 시간을 감소시킬수 있었으며, 결정의 크기도 감소하는 것으로 나타났다. 하지만 결정화 시간을 증가시키면 NaX zeolite 결정은 보다 안정한 NaP zeolite와 또 다른 상으로의 전이가 발생하였다. 본 연구에서 우리는 이러한 결과에 대해서 XRD, SEM, FT-IR과 BET을 이용하여 상세하게 연구하였다.

Keywords

References

  1. Acad. Handl. Srockholm v.17 A.F. Cronstedt
  2. Molecular Sieves Society for Chemical industry W.M. Meier
  3. Proc. the 14th. KACG. tech. meeting and the 5th Korean-Japan EMGS Kim, I. J.;Ha, H. P.
  4. Proc. 7th Int. Zeolite Conf. W. M. Meier
  5. Soc. Chem. Ind. G.H. Kuehl
  6. Proc. Intern. Symp. Mol. sieves(1st) W.M. Meier
  7. J. Cryst. Growth. v.34 E.F. Freund
  8. Advan. Chem. Ser. Molecular Sieve Zeolites G.H. Kuehl
  9. Zeolite Molecular Sieve : Structure, Chemistry and Use D.W. Breck
  10. 촉매개론 전학제
  11. J. Mat. Sci. v.Letters13 N. Shigemato;S. Sugiyma;H. Hayshi
  12. J. Cryst. Growth v.108 H.C. Fu;W.H. Chen;T.Y. Lee
  13. Perry's Chemical Engineer's Handbook R.H. Perry;D.H. Green
  14. J. Chem. Japan v.99 T. Kuma;T. Hirose
  15. Adv. Chem. Ser. v.101 E.M. Flanigen;H. Khatami;H.A. Szymanshi
  16. J. of Membrane Science v.82 M.D. Jia;K.V. Peinemann;R.D. Behling
  17. J. Mater. Sci. v.13 M. Decottigiss;J. Phalippou;J. Zarzycki
  18. J. of Chemical Engineering of Japan v.29 Toshimi Kuma
  19. J. of Korean Ind. & Eng. Chemistry v.8 no.6 J.H. Park;H.K. Suh;J.M. Lee;M.K. Doh