THE RATE OF NUCLEI FORMATION OF ZSM-5 ZEOLITE

Chung K; Kim K; Seo G

Korean Journal of Chemical Engineering, Vol.9, No.3, 144-149, July, 1992

The crystallization processes of ZSM-5 zeolite from mixture of colloid silica, sodium aluminate, sodium hydroxide and tetrapropyl ammonium bromide at 150-195℃ were studied. As the temperature increases, crystallization time decreases, crystal size becomes smaller, and the distribution becomes narrower. The rate of nuclei formation is deduced from the size distribution of final product under the assumption that crystal is growing at constant rate from the nuclei formed during the induction period. The rate of nuclei formation is also accelerated with temperature increase. When the rate constants of the crystal growth are 0.012-0.170㎛ㆍmin^-1 at 150-195℃, the crystallization curves can be simulated with the rate equation of nuclei formation deduced from the crystal size distribution of the final product.

[References]

Chang CD, Silvestri AJ, J. Catal., 56, 169 (1979)
Kaeding WW, Butter SA, J. Catal., 61, 155 (1980)
Meisel SL, McCullough JP, Lechthaler CH, Weisz PB, ChemTech., Feb., 86 (1976)
Kaeding WW, Chu CC, Young SB, Weistern B, Butter SA, J. Catal., 67, 159 (1981)
Morrison RA, U.S. Patent, 3,856,872 (1974)
Barrer RM, "Hydrothermal Chemistry of Zeolite," Academic Press, London, Chapter 4 (1982)
Nastro A, Sand LB, Zeolites, 3, 57 (1983)
Ghamami M, Sand LB, Zeolites, 3, 155 (1983)
Araya A, Lowe BM, Zeolites, 6, 111 (1986)
Thompson RW, Huber MJ, J. Cryst. Growth, 56, 711 (1982)
Thompson RW, Dyor A, Zeolites, 5, 292 (1985)
Zhdanov SP, Samuelich NN, Proc. 5th Intern. Conf. Zeolites, Heydn, London, p. 75 (1980)
Thompson RW, Dyor A, Zeolites, 5, 302 (1985)
Chao KJ, Tsai TC, Chen MS, J. Chem. Soc.-Faraday Trans., 77, 547 (1981)
Seo G, Chung K, Park T, HWAHAK KONGHAK, 30(3), 285 (1992)
Argaur RJ, Landolt GR, U.S. Patent, 3,702,886 (1972)
Erdem A, Sand LB, J. Catal., 47, 249 (1977)
Zhdanov SP, Adv. Chem. Ser., 101, 20 (1970)
Meise W, Schwochow FE, Adv. Chem. Ser., 121, 169 (1972)

[Referenced By]

[1] Chang CD, Silvestri AJ, J. Catal., 56, 169 (1979)

[2] Kaeding WW, Butter SA, J. Catal., 61, 155 (1980)

[3] Meisel SL, McCullough JP, Lechthaler CH, Weisz PB, ChemTech., Feb., 86 (1976)

[4] Kaeding WW, Chu CC, Young SB, Weistern B, Butter SA, J. Catal., 67, 159 (1981)

[5] Morrison RA, U.S. Patent, 3,856,872 (1974)

[6] Barrer RM, "Hydrothermal Chemistry of Zeolite," Academic Press, London, Chapter 4 (1982)

[7] Nastro A, Sand LB, Zeolites, 3, 57 (1983)

[8] Ghamami M, Sand LB, Zeolites, 3, 155 (1983)

[9] Araya A, Lowe BM, Zeolites, 6, 111 (1986)

[10] Thompson RW, Huber MJ, J. Cryst. Growth, 56, 711 (1982)

[11] Thompson RW, Dyor A, Zeolites, 5, 292 (1985)

[12] Zhdanov SP, Samuelich NN, Proc. 5th Intern. Conf. Zeolites, Heydn, London, p. 75 (1980)

[13] Thompson RW, Dyor A, Zeolites, 5, 302 (1985)

[14] Chao KJ, Tsai TC, Chen MS, J. Chem. Soc.-Faraday Trans., 77, 547 (1981)

[15] Seo G, Chung K, Park T, HWAHAK KONGHAK, 30(3), 285 (1992)

[16] Argaur RJ, Landolt GR, U.S. Patent, 3,702,886 (1972)

[17] Erdem A, Sand LB, J. Catal., 47, 249 (1977)

[18] Zhdanov SP, Adv. Chem. Ser., 101, 20 (1970)

[19] Meise W, Schwochow FE, Adv. Chem. Ser., 121, 169 (1972)