Olefin production from catalytic cracking of light fuel oil over different additives
محورهای موضوعی : Iranian Journal of Catalysis
Ali Afshar Ebrahimi
1
,
Sara Tarighi
2
1 - Iran Polymer and Petrochemical Institute, Faculty of Petrochemicals, P.O. Box 14965/115, Tehran, Iran.
2 - Iran Polymer and Petrochemical Institute, Faculty of Petrochemicals, P.O. Box 14965/115, Tehran, Iran.
کلید واژه: Zeolite, Propylene, Catalyst, FCC, Olefin, Additive,
چکیده مقاله :
The catalytic cracking of a fuel oil over fluid catalytic cracking (FCC) catalyst has been investigated applying different additives. Catalyst mixtures consisting of a equilibrium FCC catalyst (E-Cat) blended with ZSM-5, MCM-41 and Mordenite additives were examined at the additive levels of 25 wt.%. The catalytic performance of the matrix was studied in a fixed bed micro-activity test unit (MAT) at 600 ˚C and catalyst/oil ratio of 3.6. Two types of ZSM-5 with different Si/Al ratios were utilized. Results indicate that the yield of light olefins significantly increased by operating hybrid catalysts in comparison with the base E-Cat. The highest olefin yield of 61.46 wt.% in the gas phase products was achieved over E-Cat/ZSM-5 of low Si/Al ratio. The maximum propylene production was observed over MCM-41, besides applying mordenite as additive showed more propylene to ethylene ratio in products. Butenes were also increased by use of all additives, whereas iso-butene shows the maximum yield over all E-Cat/additives.
[1] P.B. Venuto, E.T. Habib, Fluid catalytic cracking with zeolite catalysts, Marcel Dekker, New York, 1979.
[2] N. Hosseinpour, Y. Mortazavi, A. Bazyari, A.A. Khodadadi, Fuel Process Technol. 90 (2009) 171-179.
[3] M.Y. He, Catal. Today 73 (2002) 49-55.
[4] R. Sadeghbeigi, Fluid catalytic cracking handbook, Design, Operation and troubleshooting of FCC Facilities, Second Ed., Houston, 2000.
[5] B. Wang, Q. Gao, J. Gao, D. Ji, X. Wang, J. Suo, Appl. Catal. A: Gen. 274 (2004) 167–172.
[6] T.F. Degnan, G.K. Chitnis, P.H. Schipper, Microporous Mesoporous Mater. 35-36 (2000) 245-252.
[7] A. Aitani, T. Yoshikawa, T. Ino, Catal. Today 60 (2000) 111–117.
[8] X. Gao, Z. Tang, H. Zhang, D. Ji, G. Lu, Z. Wang, Z. Tan, J. Mol. Catal. A: Chem. 325 (2010) 36–39.
[9] M.A.B. Siddiqui, A.M. Aitani, M.R. Saeed, N. Al-Yassir, S. Al-Khattaf, Fuel 90 (2011) 459–466.
[10] A.F. Costa, H.S. Cerqueira, J.M.M. Ferreira, N.M.S. Ruiz, S.M.C. Menezes, Appl. Catal. A: Gen. 319 (2007) 137-143.
[11] H.S. Cerqueira, E.C. Biscaia Jr., E.F. Sousa-Aguiar, Appl. Catal. A: Gen.164 (1997) 35-45.
[12] W. Xieqing, X. Chaogang, L. Zaiting, Z. Genquan, Practical Advances in Petroleum Processing, Springer, 2006.
[13] (a) J.S. Plotkin, Catal. Today 106 (2005) 10–14. (b) M.J. Tallman, C. Eng, Hydrocarb. Process 87 (2008) 95-101.
[14] N. Al-Yassir, Multifunctional catalysis used in thermo-catalytic cracking of hydrocarbon feedstock for the production of light olefins, Concordia, Canada, 2007.
[15] D. Wallenstein, A. Haas, R.H. Harding, Appl. Catal. A: Gen. 203 (2000) 23–36.
[16] J. Lu, Z. Zhao, C. Xu, A. Duan, X. Wang, P. Zhang, J. Porous Mater. 15 (2008) 213–220.
[17] A.W. Chester, W. E. Cormier and W. A. Stover, US Patent No. 4368114 (1983).
[18] J.M. Arandes, I. Abajo, I. Fernández, M.J. Azkoiti, J. Bilbao, Ind. Eng. Chem. Res. 39 (2000) 1917-1924.
[19] F. Zhang, X. Shu, Z. Shi, W. Wang, F. Qin, X. Wang, US Patent No. 6080698 (2000).
[20] Y. G. Adewuyi, D. J. Klocke, J. S. Buchanan, Appl. Catal. A: Gen. 131 (1995) 121-133.
