We propose using metallic supported liquid amine membranes to overcome the shortcomings of the large energy intensive amine process. Because the amine solution is immobilized in the pores of a thin nanoporous layer there is a lower vapor pressure thereby reducing the evaporation rate and the thin layer requires a small fraction of the amine compared to the absorption method. The membrane can be operated at a constant temperature, lower than the absorption process regeneration temperature, which reduces the degradation rate of the amine. We prepared a series of robust membranes based on a stainless steel support structure and a very thin nanoporous aluminum oxide layer that holds the aqueous amine solution. We will present laboratory results showing flux data and selectivity data for a range of amines under varying temperatures. We will also present stability data which demonstrates a strong promise for long-term application.
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