베릴리아-실리카 촉매의 특성과 산촉매성질

손종락; 박은희; 장향자; 김해원

Journal of the Korean Industrial and Engineering Chemistry, Vol.7, No.2, 245-251, April, 1996

Export Citation

베릴리아-실리카 촉매의 특성과 산촉매성질

Characterization and Acid Catalytic Properties of Beryllia-Silica Catalysts

손종락, 박은희, 장향자, 김해원

초록

일련의 BeO-SiO₂ 촉매를 염화베릴리움과 sodium silicate 혼합 용액을 공침전법으로 제조하였다. SiO₂에 BeO를 첨가하면 표면적, 산의 양, 산세기, 산촉매활성이 증가하여 BeO 함량이 20mo1%일 때 최대를 나타내었다. X-선 회절로 조사한 결과 400∼500℃에서 소성된 촉매는 무정형으로 존재하였으며 Bronsted 산점과 Lewis 산점 모두를 가지고 있었다. Cumene의 dealkylation 반응에 대한 촉매활성은 촉매의 산의 양과 밀접한 관계를 가졌다.

A series of BeO-SiO₂ catalysts were prepared by coprecipitation from the mixed solution of berylium chloride and sodium silicate. The addition of BeO to SiO₂ caused the increased of acidity, acid strength, specific surface area, and acid catalytic activity, giving a maximum at 20 mol% of BeO. On the basis of x-ray diffraction pattern, the catalysts calcined at 400∼500℃ were found to be amorphous, having both Bronsted and Lewis acid sites. Catalytic activities for cumene dealkylation were closely correlated with the acidity of catalysts.

[References]

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[1] Eugene Ryshkewitch and David W. Richerson, "Oxide Ceramics," 318-349, Academic Press, Orlando (1985)

[2] Bliss LG, Bull. Am. Ceram. Soc., 159 (1940)

[3] Beus AA, Fedorchuk SN, Doklady Akad. Nauk S.S.S.R., 104, 108-111 (1955)

[4] Manly WD, J. Nucl. Mater., 14, 3 (1964)

[5] Cumeforo JE, Elect. Eng., 26, 82 (1967)

[6] McCullough HM, "Moderator Materials and Their Fabrication," Materials for Nuclear Reactors, Ed., B. Kopelman, 367-382, McGraw-Hill, New York (1959)

[7] Ma BM, Nuclear Reactor Materials, and Applications, (New York: Van Nostrand Reinhold Co.) Chap. 11 (1983)

[8] Wagner MP, Rubber Chem. Technol., 47, 697 (1974)

[9] Dannenberg EM, Rubber Chem. Technol., 48, 410 (1975)

[10] Gent AN, Hsu EC, Macromolecules, 1, 933 (1974)

[11] Kamitori Y, Hojo M, Mosuda R, Izumi T, Inoue T, Systhesis, 387 (1983)

[12] Augustine RL, Jiwan L, J. Mol. Catal., 37, 189 (1986)

[13] Berry M, Champaneria RK, Howell JAS, J. Mol. Catal., 37, 243 (1986)

[14] Peri JB, J. Phys. Chem., 70, 2937 (1986)

[15] VanRoosmalen AJ, Mol JC, J. Phys. Chem., 82, 2748 (1978)

[16] Hair ML, Hertl W, J. Phys. Chem., 73, 2372 (1968)

[17] Kondo S, Ishikawa T, Yamagami N, Yoshioka K, Nakahara Y, Bull. Chem. Soc. Jpn., 60, 95 (1987)

[18] Sohn JR, Kim HJ, J. Catal., 101, 428 (1986)

[19] Sohn JR, Jang HJ, J. Catal., 136, 267 (1992)

[20] Sohn JR, Jang HJ, Park MY, Park EH, Park SE, J. Mol. Catal., 93, 149 (1994)

[21] Sittig M, "Handbook of Catalyst Manufacture," Noyes Data Co., New Jersey (1978)

[22] Ai M, J. Catal., 49, 305 (1977)

[23] Tanabe K, Catalysis: Science and Technology (eds. J.R. Anderson and M. Boudart) Springer-Verlay, Berlin, Vol. 2, Chap. 5 (1981)

[24] Farmer VC, Russel JD, Spectro. Chem. Acta, 20, 1149 (1964)

[25] Sohn JR, Ozaki A, J. Catal., 61, 29 (1980)

[26] Tanabe K, SUmiyoshi T, Shibata K, Kiyoura T, Kitagawa J, Bull. Chem. Soc. Jpn., 47, 106 (1974)

[27] Thomas CL, Ind. Eng. Chem., 41, 2564 (1949)

[28] Basila MR, Kantnerr TR, J. Phys. Chem., 71, 467 (1967)

[29] Sohn JR, Jang HJ, J. Mol. Catal., 64, 349 (1991)