Sensitivity analysis of rate constants of Weekman’s riser kinetics and evaluation of heat of cracking using CATCRAK

• Published in: Journal of molecular catalysis. A, Chemical Vol. 181; no. 1; pp. 263 - 274
• Main Authors: Pareek, V.K., Adesina, A.A., Srivastava, A., Sharma, R.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 25.03.2002; Elsevier
• Subjects: Applied sciences; Crude oil, natural gas and petroleum products; Energy; Exact sciences and technology; FCC; Fuels; Heat of cracking; Processing of crude oil and oils from shales and tar sands. Processes. Equipment. Refinery and treatment units; Riser kinetics; Sensitivity analysis; Riser kinetics; Sensitivity analysis; Heat of cracking; FCC; Oil industry; Heat; Catalyst regeneration; Refining; Fluid catalytic cracking; Simulation model; Rate constant
• ISSN: 1381-1169; 1873-314X
• DOI: 10.1016/S1381-1169(01)00371-5

Sensitivity analysis of rate constants of Weekman’s riser kinetics has been carried out using CATCRAK (A process simulator for an integrated FCC–regenerator system: Ind. Eng. Chem. Res. 34 (1995) 3737). The rate constants were varied to within ±50% of their original estimates. The variation in the rate constant was plotted against gasoline yield and overall conversion. Based on the comparisons made between various plots, the 20 rate constants of Weekman’s riser kinetics were grouped in five different categories. The advantage of such a grouping in fine-tuning the simulator predictions has been illustrated using a commercial example. Finally, a simplified model for the estimation of heat of cracking reactions has been presented. The estimated values of heat of cracking reaction (∼600 kJ/kg) compared well with the reported data.