Al-MCM-41 Tipi Mezogözenekli Katalizörlerin Hidrotermal ve Sonokimyasal Yöntemle Sentezi ve Katalitik Uygulaması
Year 2016,
Volume: 16 Issue: 3, 521 - 530, 31.12.2016
Pınar Acar Bozkurt
,
Ümran Gedikli
Abstract
Bu çalışma kapsamında alüminyum metali ile desteklenmiş Al-MCM-41 tipi mezogözenekli katalizörler hidrotermal ve sonokimyasal olmak üzere iki farklı yöntemle sentezlenmiştir. Elde edilen katalizörlerin yapısı X-ışını kırınım deseni (XRD), taramalı elektron mikroskobu (SEM), enerji dağılımlı X-ışını spektroskopisi (EDS) ve Brunauer Emmett Teller (BET) metotları ile karakterize edilmiş ve karakterizasyon sonuçları incelenerek, farklı sentez metotlarının katalizörlerin fiziksel özellikleri üzerindeki etkileri belirlenmiştir. Elde edilen sonuçlara göre sonokimyasal yöntemle sentezlenen katalizörlerin daha düzenli kristal yapısına, yüksek yüzey alanına ve mezogözenek dağılımına sahip olduğu belirlenmiştir. Düzgün gözenek boyut dağılımı ve yüksek yüzey alanına sahip MCM-41 katalizörü yeterli katalitik aktiviteye sahip olmadığı için, alüminyum metali kullanılarak silis yapısının modifikasyonu ile katalitik aktivitenin arttırılması amaçlanmıştır. Bu amaçla elde edilen Al-MCM-41 atık cep telefonu devre kartlarının pirolizinde katalizör olarak kullanılarak sıvı ürün verimi üzerine katalitik etkisi araştırılmıştır.
References
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Year 2016,
Volume: 16 Issue: 3, 521 - 530, 31.12.2016
Pınar Acar Bozkurt
,
Ümran Gedikli
References
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- Corma, A., 1997. From microporous to mesoporous molecular sieve materials and their use in catalysis. Chemical Reviews, 97, 2373 -2419.
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- Ghodke, S., Patel, R. and Chudasama, U., 2015. Mesoporous Zr-MCM-41 and Ti-MCM-41 as solid oxidation catalysts in the synthesis of epichlorohydrin. International Journal of Innovative Research in Science, Engineering and Technology, 4, 18735-18743.
- Hall, W. J. and Williams, P. T., 2008. Removal of organobromine compounds from the pyrolysis oils of flame retarded plastics using zeolite catalyst. Journal of Analytical and Applied Pyrolysis, 81, 139–147.
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- Hui, K. S. and Chao, C. Y. H., 2006. Synthesis of MCM-41 from coal fly ash by a green approach: Influence of synthesis pH. Journal of Hazardous Materials, 137, 1135-1148.
- Kong, Y., Zhu, H., Yang, G., Guo, X., Hou, W., Yan, Q., Gu, M. and Hu, C., 2004. Investigation of the structure of MCM-41 samples with a high copper content. Advanced Functional Materials, 14, 816-820.
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- Laha, S. C., Mukherjee, P., Sainkar,S. R. and Kumar, R., 2002. Cerium containing MCM-41-type mesoporous materials and their acidic and redox catalytic properties. Journal of Catalysis, 207, 213–223.
- Lewandowska, A., Monteverdi, S., Bettahar, M. and Ziolek, M., 2002. MCM-41 mesoporous molecular sieves supported nickel—physico-chemical properties and catalytic activity inhydrogenation of benzene. Journal of Molecular Catalysis A: Chemical, 188, 85–95.
- Lindlar, B., Kogelbaue, A. and Prins, R., 2000. Chemical, structural, and catalytic characteristics of Al-MCM-41 prepared by pH-controlled synthesis. Microporous and Mesoporous Materials, 38, 167-176.
- Makhlid, I. A., Mohamed, R. M., El-Midany, A. A., Ibrahim, I. A. and El-Mossal, E. H., 2010. Preparation and characterization of nanosized Al-MCM-41 using different silica sources. Journal of Environmental Science and Engineering, 4, 21-28.
- Ocelli, M. L., Biz, S. and Auroux, A., 1999. Effects of isomorphous substitution of Si with Ti and Zr in mesoporous silicates with the MCM-41 structure. Applied Catalysis A: General, 183, 231-239.
- Sekkiou, H., Hamacha, R., Ali-Dahmane, T., Morsli, A. and Bengueddach, A., 2013. The effect of the method of copper incorporation on the structure of Si-MCM-41 and Al-MCM-41. Journal de la Société Chimique de Tunisie, 15, 93-99.
- Selvam, P., Bhatia, S. K. and Sonwane, C. G., 2001. Recent advances in processing and characterization of periodic mesoporous MCM-41 silicate molecular sieves. Industrial Engineering Chemistry Research, 40, 3237-3261.
- Suslick, K. S., 1990. Sonochemistry. Science, 247, 1439-1445.
- Suslick, K. S., 1995. Applications of ultrasound to materials chemistry. MRS Bulletin, 20, 29-34.
- Wang, X., Jia, J., Zhao, L. and Sun, T., 2008. Mesoporous SBA-15 supported iron oxide: A potent catalyst for hydrogen sulfide removal. Water, Air and Soil Pollution, 193, 247-257.
- Vartuli, J. C., Kresge, C. T., Leonowicz, M. E., Chu, A. S., McCullen, S. B., Johnson, I. D. and Sheppard, E. W., 1994. Synthesis of mesoporous materials: liquid-crystal templating versus intercalation of layered silicates. Chemistry of Mateials, 6, 2070-2077.
- Vartuli, J. C., Schmitt, K. D., Kresge, C. T., Roth, W. J., Leonowicz, M. E., McCullen, S. B., Hellring, S. D., Beck,J. S., Schlenker, J. L., Olson, D. H. and Sheppard, E. W., 1994. Effect of surfactant/silica molar ratios on the formation of mesoporous molecular sieves: inorganic mimicry of surfactant liquid-crystal phases and mechanistic implications. Chemistry of Mateials, 6, 2317-2326.
- Zanjanchi, M.A and Asgari, S., 2004. Incorporation of aluminum into the framework of mesoporous MCM-41: the contribution of diffuse reflectance spectroscopy. Solid State Ionics, 171, 277–282.