June 2003

Special Report: Process/Plant Optimization

Consider physical solvents to treat natural gas

New solvent systems cost-effectively remove high-CO 2 concentrations from natural gas to meet pipeline specs

As high-quality natural gas resources are depleted, less-desirable gas reserves must be developed. In some cases, the acid-gas concentration of these reserves is very high, and the economics to produce pipeline-quality gas is marginal. Consequently, novel processing methods are sought to cost-effectively remove acid gases. Such technology is available; new techniques can treat feedgas with high CO2 partial pressure and low H2S content. Several processing configurations apply a physical solvent-based approach to handle a wide range of gas streams containing high CO2 content. In addition, a new flow scheme can produce liqu

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