propylene yield from naphtha pyrolysis cracking using surface response analysis

The study was conducted in the actual world-scale olefin plant with a focus on measuring the impact of identified controlled variables at the s team cracker furnace towards the propylene yield. surface response analysis was conducted in the minitab software version 20 using the his torical data after the clearance of both the outliers and residuals to ensure the analysis was conducted as normal data. surface response analysis is a robus t mathematical and s tatis tical approach that is having a good potential to be sys tematically utilized in the actual large-scale olefin plant as an alternative to the expensive olefin simulation software for process monitoring. the analysis was conducted to forecas t the maximum propylene yield in the s tudied plant with careful consideration to select only significant variables, represented by a variance inflation factor (vif) <10 and p-value <0.05 in the analysis of variance (anova) table. the final model successfully concluded that propylene yield in the s tudied plant was contributed by the factors of 0.00496, 0.00204, and -3.96 of hearth burner flow, dilution s team flow, and naphtha feed flow respectively. the response optimizer also sugges ted that the propylene yield from naphtha pyrolysis cracking in the s tudied plant could be maximized at 11.47% with the control setting at 10,004.36 kg/hr of hearth burner flow, 40,960 kg/hr of dilution s team flow, and 63.50 t/hr of naphtha feed flow.