Membrane Process to Sequester CO2 From Power Plant Flue Gas

Merkel, Tim ; Amo, Karl ; Baker, Richard ; Daniels, Ramin ; Friat, Bilgen ; He, Zhenjie ; Lin, Haiqing ; Serbanescu, Adrian

Membrane Technology & Research, Incorporated

关键词: Natural Gas;    Combustion;    Membranes;    Air;    36 Materials Science;   

DOI  :  10.2172/1015458
RP-ID  :  None
RP-ID  :  FC26-07NT43085
RP-ID  :  1015458

美国|英语

来源: UNT Digital Library

【 摘 要 】

The objective of this project was to assess the feasibility of using a membrane process to capture CO2 from coal-fired power plant flue gas. During this program, MTR developed a novel membrane (Polaris™) with a CO2 permeance tenfold higher than commercial CO2-selective membranes used in natural gas treatment. The Polaris™ membrane, combined with a process design that uses a portion of combustion air as a sweep stream to generate driving force for CO2 permeation, meets DOE post-combustion CO2 capture targets. Initial studies indicate a CO2 separation and liquefaction cost of $20 - $30/ton CO2 using about 15% of the plant energy at 90% CO2 capture from a coal-fired power plant. Production of the Polaris™ CO2 capture membrane was scaled up with MTR’s commercial casting and coating equipment. Parametric tests of cross-flow and countercurrent/sweep modules prepared from this membrane confirm their near-ideal performance under expected flue gas operating conditions. Commercial-scale, 8-inch diameter modules also show stable performance in field tests treating raw natural gas. These findings suggest that membranes are a viable option for flue gas CO2 capture. The next step will be to conduct a field demonstration treating a realworld power plant flue gas stream. The first such MTR field test will capture 1 ton CO2/day at Arizona Public Service’s Cholla coal-fired power plant, as part of a new DOE NETL funded program.