CRYSTAL GROWTH OF HIGH SILICA ZSM-5 AT LOW TEMPERATURE SYNTHESIS CONDITIONS

Kiyozumi Y; Shin S; Shul YG; Ihm SK; Koo KK

Korean Journal of Chemical Engineering, Vol.13, No.2, 144-149, March, 1996

Kiyozumi Y, Shin S, Shul YG, Ihm SK, Koo KK

At the temperature of 90℃ and under atmospheric pressure, growth kinetics of high silica ZSM-5 was investigated through a long induction, uncleation and crystal growth periods. It was found the entire crystallization mechanism of ZSM-5 seems to be the combined process of the nucleation via solid-solid transformation, intergrowth among seed crystals and the normal growth in the reaction mixture. Nuclei were initially formed on the Si-rich surface of the amorphous intermediates, indicating that the reaction of TPA with Si species was prior to that with Al species. as the reaction time proceeded, various types of intergrowth among the seed crystals were observed along with the crystals growing independently. The intergrowth seems to play a role forming typical ZSM-5 crystal shapes. And then ZSM-5 crystals further grew in the reaction mixture, so that the bulk Si/Al₂ ratio of crystals approach-ed that of the initial reaction mixture.

Keywords:ZSM-5;Synthesis;Atmospheric Pressure;Crystal Growth;Intergrowth

[References]

Brinker CJ, Scherer GW, "Sol-Gel Science," Academic Press, London (1990)
Ciric J, J. Colloid Interface Sci., 28, 315 (1968)
Cournoyer RA, Kranich KL, Sand LB, J. Phys. Chem., 79, 1578 (1975)
Derouane EG, Detremmerie S, Gabelica Z, Blom N, Appl. Catal., 1, 201 (1981)
Kerr GT, J. Phys. Chem., 70, 1047 (1966)
Kingery WD, Bowen HK, Uhlmann DR, "Introduction to Ceramics," John Wiley & Sons, New York (1976)
Konatowski J, Zeolites, 8, 77 (1988)
Iacobs DA, Derouane EG, Weitkamp J, J. Chem. Soc. Chem. Commun., 591 (1981)
Lee KH, "A Study on the Synthesis Mechanism and Catalytic Performance of Pentasil Type Zeolite," Ph.D. Dissertation, Korea Advanced Institute of Science and Technology, Taejon, Korea (1992)
Lermar H, Draeger M, Steffen J, Unger KK, Zeolites, 5, 131 (1985)
Lowe BM, Zeolites, 3, 300 (1983)
McNicol RD, Pott GT, Loos KR, J. Phys. Chem., 70, 1047 (1966)
Minotova S, Veltchev V, Kanev I, Zeolites, 13, 102 (1993)
Narita E, Sato K, Yatabe N, Okabe T, Ind. Eng. Chem. Prod. Res. Dev., 24, 507 (1985)
Padovan M, Leofanti G, Solari M, Moretti E, Zeolites, 4, 295 (1984)
Suzuki K, Kiyozumi Y, Matsuzaki K, Shin S, Appl. Catal., 35, 401 (1987)
Suzuki K, Kiyozumi Y, Matsuzaki K, Shin S, Appl. Catal., 42, 35 (1988)
Szostak R, "Molecular Sieves-Principles of Synthesis and Identification," Van Nostrand Reinhold Co., New York, NY (1989)
Ueda S, Murata H, Koizumi M, Am. Miner., 65, 1012 (1980)

[Referenced By]

[1] Brinker CJ, Scherer GW, "Sol-Gel Science," Academic Press, London (1990)

[2] Ciric J, J. Colloid Interface Sci., 28, 315 (1968)

[3] Cournoyer RA, Kranich KL, Sand LB, J. Phys. Chem., 79, 1578 (1975)

[4] Derouane EG, Detremmerie S, Gabelica Z, Blom N, Appl. Catal., 1, 201 (1981)

[5] Kerr GT, J. Phys. Chem., 70, 1047 (1966)

[6] Kingery WD, Bowen HK, Uhlmann DR, "Introduction to Ceramics," John Wiley & Sons, New York (1976)

[7] Konatowski J, Zeolites, 8, 77 (1988)

[8] Iacobs DA, Derouane EG, Weitkamp J, J. Chem. Soc. Chem. Commun., 591 (1981)

[9] Lee KH, "A Study on the Synthesis Mechanism and Catalytic Performance of Pentasil Type Zeolite," Ph.D. Dissertation, Korea Advanced Institute of Science and Technology, Taejon, Korea (1992)

[10] Lermar H, Draeger M, Steffen J, Unger KK, Zeolites, 5, 131 (1985)

[11] Lowe BM, Zeolites, 3, 300 (1983)

[12] McNicol RD, Pott GT, Loos KR, J. Phys. Chem., 70, 1047 (1966)

[13] Minotova S, Veltchev V, Kanev I, Zeolites, 13, 102 (1993)

[14] Narita E, Sato K, Yatabe N, Okabe T, Ind. Eng. Chem. Prod. Res. Dev., 24, 507 (1985)

[15] Padovan M, Leofanti G, Solari M, Moretti E, Zeolites, 4, 295 (1984)

[16] Suzuki K, Kiyozumi Y, Matsuzaki K, Shin S, Appl. Catal., 35, 401 (1987)

[17] Suzuki K, Kiyozumi Y, Matsuzaki K, Shin S, Appl. Catal., 42, 35 (1988)

[18] Szostak R, "Molecular Sieves-Principles of Synthesis and Identification," Van Nostrand Reinhold Co., New York, NY (1989)

[19] Ueda S, Murata H, Koizumi M, Am. Miner., 65, 1012 (1980)