Abstract

Background: Raw natural gas, one of the most important fuel sources worldwide, contains high level of CO2, which must be removed to avoid problems like pipeline corrosion, compression cost and reduction of heating value. The three main technologies used to separate CO2 from natural gas include cryogenic distillation, amine absorption and membranes. Membrane technologies have various advantages especially for offshore platforms. In recent years, more and more membrane systems have been applied to large offshore natural gas upgrading projects. Two entirely different membrane processes can be applied to the separation of CO2 from natural gas: gas permeation membranes and membrane contactors. Keywords: CO2 separation, gas permeation membrane, membrane contactors, membrane plasticization, membrane technology, natural gas, pre-treatment systems.

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