A113 Thermodynamic Simulations of Isobaric Hydrate-Forming Operations for Carbon Dioxide Separation from CH_4+CO_2 Mixed Gas

Abstract

We present a preliminary thermodynamics-based simulation study about the hydrate-based multistage separation of CO_2 from a CH_4 + CO_2 mixture, a simplified model of a low-quality natural gas supplied from gas fields in Southeast Asia. The entire process at an arbitrary one of the successive stages has been modeled as an isobaric hydrate-forming operation in an open thermodynamic system accompanied by successive feed gas + water supply and gas + aqueous liquid + hydrate discharge. Based on such a modeling, we have predicted the evolution of the composition (CH_4 and CO_2 fractions) of the gas discharged from the system.