PETROCHEMICAL PROMOTERS IN CATALYTIC CRACKING
This study is based on the current scheme followed by a refinery with available Catalytic Cracking capacity to process new feedstocks such as Straight Run Naphtha and Naphthas from FCC. These feedstocks are of petrochemical interest to produce Ethane, Ethylene, Propylene, i-Butane, Toluene and Xylene.
To evaluate the potential of these new streams versus the Cracking-charged Residues, it was performed a detailed chemical analysis on the structural groups in carbons [C1-C12] at the reactor product obtained in pilot plant. A catalyst with and without Propylene - Promoter Additive was used. This study analyzes the differences in the chemical composition of the feedstocks, relating them to the yield of each petrochemical product. Straight Run Naphthas with a high content of Naphthenes, and Paraffines n[C5-C12] and i[C7-C12] are selective to the production of i-Butane and Propane, while Naphthas from FCC with a high content of n[C5-C12]Olefins, i-Olefins, and Aromatics are more selective to Propylene, Toluene, and Xylene. Concerning Catalytic Cracking of Naphthas, the Additive has similar selectivity for all the petrochemical products, their yields increase by about one point with 4%wt of Additive, while in cracking of Residues, the Additive increases in three points Propylene yield, corresponding to a selectivity of 50% (ΔC3= / ΔLPG).
ASTM D1945. (2003). Standard Test Method for Analysis of Natural Gas Chromatography.
ASTM D6729. (2004). Standard Test Method for Determination of Individual Components in Spark Ignition Engine Fuels by 100 Metre Capillary High Resolution Gas Chromatography.
ASTM D7213. (2005). Standard Test Method for Boiling Range Distribution of Petroleum Distillates in the Boiling Range from 100 to 615°C by Gas Chromatography.
Buchanan, J., S. (1991). Reactions of model compounds over steamed ZSM-5 at simulated reaction conditions. Appl. Cat. 74: 83-94. https://doi.org/10.1016/0166-9834(91)90010-6
Buchanan, J., S. (1998). Gasoline selective ZSM-5 FCC Additives: Model reaction of C6-C10 olefins over steamed 55:1 and 450:1 ZSM-5. Appl. Catal. A: Gen., 171: 57-64. https://doi.org/10.1016/S0926-860X(98)00074-X
Hollander, M., A., Wissink, M., Makken, M. & Moulijn, J. A. (2002). Gasoline conversion: reactivity towards cracking with equilibrated FCC and ZSM-5 catalysts. Appl. Catal. A: Gen., 223: 85-102. https://doi.org/10.1016/S0926-860X(01)00745-1
Timken, H. K. C. & Angevine, P. J. (1997). Production of Benzene, Toluene, and Xylene (BTX) from FCC Naphtha. United States Patent, Patent number: 5,685,972, Nov. 11.
UOP 539. (1997). Refinery Gas Analysis by Gas hromatography.
Wang, L., Yang, B. & Wang, Z. (2005). Lumps and kinetics for the secondary reactions in catalytically cracked gasoline. Chem. Eng. J., 109: 1-9. https://doi.org/10.1016/j.cej.2005.02.024
Wang, G., Yang, G., Xu, C. & Gao, J. (2008). A novel conceptional process for residue catalytic cracking and gasoline reformation dual-reactions mutual control. Appl. Catal. A: Gen., 341 (1-2), 98-105. https://doi.org/10.1016/j.apcata.2008.02.031
Wang, Gang., Xu, Chunming. & Gao, Jinsen. (2008).Study of cracking FCC naphtha in a secondary riser of the FCC unit for maximum propylene production. Fuel Processing Technology, 89 (9), 864-873. https://doi.org/10.1016/j.fuproc.2008.02.007
Yang, B., Zhou, X., Chen, C., Yuan, J. & Wang, L. (2008).Molecule simulation for the secondary reactions of fluid catalytic cracking gasoline by the method of structure oriented lumping combined with Monte Carlo. Ind. Eng. Chem. Res., 47 (14), 4648-4657. https://doi.org/10.1021/ie800023x
Zhao, X. & Harding, R., H. (1999). ZSM-5 Additive in fluid catalytic cracking. 2. Effect of hydrogen transfer characteristics of the base cracking catalysts and feedstocks. Ind. Eng. Chem. Res., 38 (10), 3854-3859. https://doi.org/10.1021/ie990180p
Zhao, X. & Roberie, T., G. (1999). ZSM-5 Additive in fluid catalytic cracking. 1. Effect of Additive level and temperature on light olefins and gasoline olefins. Ind. Eng. Chem. Res., 38 (10), 3847-3853. https://doi.org/10.1021/ie990179q
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