Simulation of the absorption tower of the gas dehydration unit and estimation of the BTEX solubility in TEG.
کد مقاله : 1301-PHYSCHEM20
مریم انصاری، فرزاد علوی *
عضو هیأت علمی دانشکده مهندسی شیمی، نفت و گاز؛ دانشگاه صنعتی شیراز
چکیده مقاله:
One of the most important steps of gas processing is the gas dehydration. In this unit, water vapor from the natural gas stream is removed by absorption into a solvent such as tri-ethylene glycol (TEG). From the environmental point of view, a problem of this unit is the solubility of the aromatic compounds, mainly benzene, toluene, ethylbenzene, xylenes (BTEX) in TEG and then release of these compounds into the atmosphere. Accurate simulation of this units can be a great help to optimize the operating parameters and reduce the emission rate of this materials. In this work, the Peng-Robinson (PR) Equation of State (EOS) is used for estimating the BTEX solubility in TEG in the absorber. Since the final emission rate is determined by the solubility in absorber, this work focuses on the simulation of absorber. The absorber is simulated using a customized code and no simulation software is used. At steady conditions, the amount of absorption of BTEX into TEG determines the amount of BTEX emissions into atmosphere.
کلیدواژه ها:
Natural Gas; Dehydration; PR EOS; TEG; BTEX
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