Выходит 4 номеров в год
ISSN Печать: 2572-9896
ISSN Онлайн: 2572-990X
Indexed in
EFFECT OF PARTICLE SIZE OF ZSM-5 ZEOLITE ON CATALYTIC PERFORMANCE
Get access
Краткое описание
The effect of various synthesis parameters on the particle size of ZSM-5 and its effect on catalytic performance in olefin removal from aromatic streams were investigated. H-ZSM-5 samples with particle size ranging from 50 to 2500 nm were synthesized by varying the structure-directing agents, silica-alumina sources with varied crystallization parameters. Physicochemical properties of the prepared samples were elucidated by characterization techniques such as x-ray diffraction, the Brunauer-Emmett-Teller method, pore-size distribution, scanning electron microscopy, NH3 temperature-programmed desorption, and inductively coupled plasma analysis. Prepared catalyts were tested for olefin removal from aromatic streams. Small-particle-sized ZSM-5 catalysts were observed with high activity and slow deactivation compared to those of large-particle-sized ZSM-5. High activity and stability of small-particle-sized ZSM-5 is attributed to shortened channel lengths, high surface area, mesoporosity, and exposure of more active sites to the substrate molecules. A detailed study on the structure activity correlation ship is established in the present investigation.
-
Argauer, R.J. and Landolt, G.R., Crystalline Zeolite ZSM-5 and Method of Preparing the Same, US Patent 3,702,88, filed October 10, 1969, and issued November 14,1972.
-
Choi, M., Na, K., Kim, J., Sakamoto, Y., Terasaki, O., and Ryoo, R., Stable Single-Unit-Cell Nanosheets of Zeolite MFI as Active and Long-Lived Catalyst, Nature (London), vol. 461, pp. 246-249,2009.
-
Derouane, E.G., Dejaifve, P., Gabelica, Z., and Vedrine, J.C., Molecular Shape Selectivity of ZSM-5, Modified ZSM-5, and ZSM-11 Type Zeolites, Faraday Discuss. Chem. Soc., vol. 72, pp. 331-334,1981.
-
Falamaki, C., Edrissi, M., and Sohrabi, M., Studies on the Crystallization Kinetics of Zeolite ZSM-5 with 1,6-Hexanediol as a Structure-Directing Agent, Zeolites, vol. 19, no. 1, pp. 2-5,1997.
-
Fouad, O.A., Mohamed, R.M., Hassan, M.S., and Ibrahim, I.A., Effect of Template Type and Template/Silica Mole Ratio on the Crystallinity of Synthesized Nanosized ZSM-5, Catal. Today, vol. 116,no. 1,pp. 82-87,2006.
-
Kumar, N.,Nieminen, V., Demirkan, K., Salmi, T., Murzin, D.Y., andLaine, E., Effect of Synthesis Time and Mode of Stirring on Physico-Chemical and Catalytic Properties of ZSM-5 Zeolite Catalysts, Appl. Catal. A: Gen., vol. 235, nos. 1-2, pp. 113-123, 2002.
-
Na, K., Choi, M., Terasaki, O., Park, W., Sakamoto, Y., and Ryoo, R., Pillared MFI Zeolite Nanosheets of a Single-Unit-Cell Thickness, J. Am. Chem. Soc, vol. 132, no. 12, pp. 4169-4177,2010.
-
Olson, D.H., Rollmann, L.D., and Valyocsik, E.W., Method of Synthesizing Large Crystal Zeolite ZSM-5 with Controlled Production ofSmall Crystals, European Patent 0026962A1, filed June 6, 1980 and issued April 15,1981.
-
Pana, F., Lu, X., Zhua, Q., Zhanga, Z., Yana, Y., Wanga, T., and Chena, S., Direct Synthesis of HZSM-5 from Natural Clay, J. Mater. Chem. A, vol. 3, pp. 4058-4066,2015.
-
Reddy, J.K., Motokura, K., Koyama, T., Miyaji, A., and Baba, T., Effect of Morphology and Particle Size of ZSM-5 on Catalytic Performance for Ethylene Conversion and Heptane Cracking, J. Catal., vol. 289, no. 5, pp. 53-61,2012.
-
Rollmann, L.D. and Valyocsik, E.W., Synthesis of Large Crystal ZSM-5 and Zeolite so Made, European Patent 0021674A1, filed June 6, 1980, and issued January 7, 1981.
-
Serrano, D.P., Aguado, J., Morales, G., Rodriguez, J.M., Peral, A., Thommes, M., Epping, J.D., and Chmelka, B.F., Molecular and Meso- and Macroscopic Properties of Hierarchical Nanocrystalline ZSM-5 Zeolite Prepared by Seed Silanization, Chem. Mater., no. 4, pp. 641-654,2009.
-
Smail, H.A., Rehan, M., Shareef, K.M., Ramli, Z., Nizami, A.S., and Gardy, J., Synthesis of Uniform Mesoporous Zeolite ZSM-5 Catalyst for Friedel-Crafts Acylation, Chem. Eng., vol. 3, no. 2, pp. 35-45,2019.
-
Tago, T., Iwakai, K., Nishi, M., and Masuda, M., Synthesis of Mono-Dispersed Silicalite-1 Nanocrystals in Water-Surfactant-Organic Solvent, J. Nanosci. Nanotechnol., vol. 9, no. 1, pp. 612-617,2009.
-
Wang, K. and Wang, X., Comparison of Catalytic Performances on Nanoscale HZSM-5 and Microscale HZSM-5, Microporous Mesoporous Mater, nos. 1-3, pp. 187-192,2008.