Publisher : The Korean Society of Clean Technology
DOI : 10.7464/ksct.2016.22.2.082
Title & Authors
Effect of Hydrogen Ratio and Tin Addition on the Coke Formation of Platinum Catalyst for Propane Dehydrogenation Reaction Kim, Soo Young; Kim, Ga Hee; Koh, Hyoung Lim;
The loss of activity by coke is an important cause of catalyst deactivation during industrial operation. In this study, hydrogen ratio of reaction condition, which has influenced on coke formation over Pt-Sn catalyst, and regeneration of catalysts activity by coke burning, Pt sintering of coke burning as coke contents, effects of coke formation and deactivation with different Sn contents were confirmed. Pt-Sn-K catalyst supported on θ-alumina and γ-alumina was prepared progressively. Activity of regenerated catalyst for propane dehydrogenation was compared with fresh catalyst by coke burning, after propane dehydrogenation was carried out with different hydrogen ratio at 620 ℃ on fresh catalyst. Regenerated catalyst’s physical characterization such as BET, coke analysis and XRD was investigated. Through catalytic activity test and characterization, Sn contents of catalyst and hydrogen ratio in feed stream could affect coke formation on catalyst surface. Excessive coke makes loss of activity and Pt sintering during air regeneration process.
Lai, Y., He, S., Luo, S., Bi, W., Li, X., Sun, C., and Seshan, K., “Hydrogen Peroxide Modified Mg-Al-O Oxides Supported Pt-Sn Catalysts for Paraffin Dehydrogenation,” Catal. Commun., 69, 39-42 (2015).
Zangeneh, F. T., Sahebdelfar, S., and Bahmani, M., “Propane Dehydrogenation over a Commercial Pt-Sn/Al2O3 Catalyst for Isobutene Dehydrogenation : Optimization of Reaction Conditions,” Chem. Eng., 21(7), 730-735 (2013).
Mann, R., “Fluid Catalytic Cracking: Some Recent Developments in Catalyst Particle Design and Unit Hardware,” Catal. Today., 18, 509-528 (1993).
Corma, A., Mengual, J., and Miguel, P. J., “IM-5 Zeolite for Steam Catalytic Cracking of Naphtha to Produce Propene and Ethene. An Alternative to ZSM-5 Zeolite,” Appl. Catal. A, 460-461, 106-115 (2013).
Tan, S., Gil, L. B., Subramanian, N., Sholl, D. S., Nair, S., Jones, C. W., Moore, J. S., Liu, Y., Dixit, R. S., and Pendergast, J. G., “Catalytic Propane Dehydrogenation over In2O3-Ga2O3 Mixed Oxides,” Appl. Catal. B, 498, 167-175 (2015).
Ren, T., Patel, M., and Blok, K., “Olefins from Conventional and Heavy Feedstocks: Energy use in Steam Cracking and Alternative Processes,” Energy., 31, 425-451 (2006).
Han, Z., Li, S., Jiang, F., Jiang, F., Wang, T., Ma, X., and Gong, J., “Propane Dehydrogenation over Pt-Cu Bimetallic Catalysts: the Nature of Coke Deposition and the Role of Copper,” Nanoscale, 6, 10000-10008 (2014).
Liu, Y. M., Cao, Y., Yi, N., Yi, N., Feng, W. L., Dai, W. L., Yan, S. R., He, H. Y., and Fan, K. N ., “Vanadium Oxide Supported on Mesoporous SBA-15 as Highly Selective Catalysts in the Oxidative Dehydrogenation of Propane,” J. Catal., 224, 417-428 (2004).
Blasco, T., and Lopez nieto, J. M., “Oxidative Dehydrogenation of Short Chain Alkanes on Supported Vanadium Oxide Catalysts,” Appl. Catal. A, 157, 117-142 (1997).
Sugiyama, S., Iizuka, Y., Nitta, E., Hayashi, H., and Moffat, J. B., “Role of Tetrachloromethane as a Gas-phase Additive in the Oxidative Dehydrogenation of Propane over Cerium Oxide” J. Catal., 189, 233-237 (2000).
Bettahar, M. M., Costentin, G., Savary, L., and Lavalley, J. C., “On the Partial Oxidation of Propane and Propylene on Mixed Metal Oxide Catalysts,” Appl. Catal. A, 145, 1-48 (1996).
Chaar, M. A., Patel, D., and Kung, H. H., “Selective Oxidative Dehydrogenation of Propane over V-Mg-O Catalysts,” J. Catal., 109, 463-467 (1988).
Vu, B. K., Song, M. B., Ahn, I. Y., Suh, Y. W., Suh, D. J., Kim, J. S., and Shin, E. W., “Location and Structure of Coke Generated over Pt-Sn/Al2O3 in Propane Dehydrogenation,” J. Ind. Eng. Chem., 17, 71-76 (2011).
Park, S. E., Kim, M. J., and Chon, H., “Regeneration of γ-alumina Supported Platinum Catalyst (I),” Korea Chem. Eng. Res., 22, 65-72 (1984).
Yoon, J. S., Suh, D. J., Park, T. J., Cho, Y. S., and Suh, Y. W., “Value-added Chemicals Derived from Propane Using Heterogeneous Catalysts,” Clean Technol., 14(2), 71-86 (2008).
Gascon, J., Tellez, C., Herguido, J., and Menendez, M., “A Two-zone Fluidized Bed Reactor for Catalytic Propane Dehydrogenation,” J. Chem. Eng., 106, 91-96 (2005).
Ko, S. M., Koo, S. M., Kim, J. H., Cho, W. S., and Hwang, K. T., “Synthesis of Silicon Carbide Nano-powder from a Silicon-organic Precursor by RF Inductive Thermal Plasma,” J. Korean Ceram. Soc., 49(6), 523-527 (2012).
Franklin, C., Daniel, A., and Osvaldo, F. G., “Dehydrogenation of Propane on Chromia/alumina Catalysts Promoted by Tin,” Catal. Today, 133-155, 800-804 (2008).
Cho, K. H., Kang, S. E., Park, J. H., Cho, J. H., and Shin, C. H., “Effect of Reaction Conditions for n-Butane Dehydrogenation over Pt-Sn/θ-Al2O3 Catalyst,” Clean Technol., 18(2), 162-169 (2012).