Energy Utilization and Process Performance

The modem refinery is not only concerned with meeting product specifications and demands, but also the energy and utility (cooling water, power) consumption of various units. Table 5.18 lists some of the utility consumption data based on various catalytic reforming processes. 

Power (kW-hr/barrel of feed) Cooling water (gal/barrel of feed) 

We consider the scenario in Table 5.19, where reactor inlet temperature for each reactor bed is fixed to certain values. The values in parenthesis indicate change from the base case. We change the reactor inlet temperatures by values given in the table for four subsequent model runs. We choose these values to highlight the effect of reactor inlet temperatures on the initial, final and intermediate beds independently. The results of this case study appear in Table 5.20. 

While initially the fired duty reductions appear quite small (0.5-1.4%), this may lead to significant energy savings in fuel costs for the fired heater. Vinayagam [51] states that even a 1% reduction in fuel consumption can provide significant 

Scenario Total Fired Duty (kj/kg) Aromatic Yield (wt.%) C5+ RON C5-I-Yield (wt.%) Fired Duty Deviation 

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