Better heat and power integration of an existing gas-oil plant in Egypt through revamping design and organic Rankine cycle

Abstract

The current study aims mainly to maximize the condensate recovery (NGLs) focusing on a gas processing train of gas-oil separation plant (GOSP) located in Egypt with a capacity of 4,230 kmole/h. The research study accounts for the constraint of Reid Vapor Pressure (RVP) specification which makes the storage in floating roof tanks is of a great risk. The study proposes the installation of cryogenic train that recovers condensates (C4+) This train comprises of compression unit, expansion unit, three phase separators and re-boiled absorber. The problem of RVP will no longer exist because of the reboiled absorber achieving RVP according to export specifications (RVP below 82.74 kPa). Heat integration is applied over the whole process to minimize the reliability on the external utilities. Further, an organic Rankine cycle (ORC) is introduced to the existing unit for more heat integration, to develop useful work from process waste heat. Furthermore, both environmental emissions of CO2 and economic implications are investigated.