Faculty of Chemistry, Campus of Sciences, University of Tehran, Tehran, I.R. IRAN
The emission of greenhouse gases, especially aromatic compounds, is a major challenge in the gas industry. In the dehydration process, glycol solvents are used to eliminate water content from the natural gas stream. Farashband gas processing plant consists of six dehydration units that operate by application of stripping gas injection. In this study, the application of Drizo process instead of the conventional process for solvent regeneration is investigated and in order to reduce the BTEX emission and decrease the solvent cost, the use of BTEX absorbed components from the gas stream as a regenerative solvent is suggested. Achieved results indicated that the application of Drizo process decreases the harmful environmental effects and improves the main operating parameters such as dewpoint of dry natural gas, glycol loss, and glycol purity. Also, according to simulation results, by application of Drizo process, the dewpoint of dry natural gas in the summer operating condition reduces from -25 ℃ to -29 ℃ and the glycol loss decreases from 3 kg/h to 2.5 kg/h.