Abstract
Gas processing for natural gas liquids (NGLs) and liquefied petroleum gas ( LPG) recovery is becoming of great interest due to higher sale prices of these products as well as the increase in market demand. However, many of the present recovery units in operation are not giving the desired revenue. The main focuses this study is to retrofit an Egyptian LPG plant for improving NGL recovery. A comparison had been hold between the most applicable cryogenic techniques -in which this plant could be retrofitted to- which can achieve the same targeted cooling and recovery in terms of power consumption and required additional capital cost to detect the best techniques to be applied to maximize NGL liquid Recovery. The replacement of pure propane refrigerant used to C5+ recovery by a mixed refrigerant type was selected as the best techniques which can be applied to improve NGL recovery. Due to its proper physical and thermodynamic properties that lower exergy losses and raise the exchanger effectiveness. Another comparison had been hold to detect which degree of recovery (butane or propane) will be selected for retrofitting the plant and giving the highest return on investment.
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