Patent ID: 8317906
Filing Date: 2012-11-27
Classification: B01D,Y02A,Y02C

Abstract:
1. A membrane contactor system for use in separating carbon dioxide from a gaseous stream in a continuous flow process, the system comprising: a housing defining a gas flow path and comprising a first outlet for the carbon dioxide and a second outlet for a purified gas; an expanded polytetrafluoroethylene microporous membrane positioned in the housing to allow the gaseous stream to flow across a side of the expanded polytetrafluoroethylene microporous membrane, where the expanded polytetrafluoroethylene microporous membrane comprises a structure of nodes connected by fibrils in which surfaces of the structure of nodes and fibrils define a plurality of interconnecting pores extending through the expanded polytetrafluoroethylene microporous membrane, wherein the plurality of interconnecting pores are configured to allow the carbon dioxide to diffuse therethrough; an oleophobic enhancement coating disposed on the surfaces of the structure of nodes and fibrils to form a coated membrane and configured to provide oleophobicity to the coated membrane without blocking the plurality of interconnecting pores; and an amine based sorbent liquid disposed on a side of the expanded polytetrafluoroethylene microporous membrane opposite the gaseous stream, wherein the amine based sorbent liquid is configured to absorb the carbon dioxide from the gaseous stream.