The Gas Technology Institute (GTI), along with Air Liquide Advanced Separations, will continue development of a novel nanoporous, super-hydrophobic contactor process for solvent-based post-combustion CO2 capture from coal-fired power plants. The polyether ether ketone (PEEK) hollow fiber contactor (HFC) will be advanced from bench-scale to pilot-scale testing. The PEEK HFC process takes advantage of both the compact nature of an HFC process and the high selectivity of an absorption process. In the process, CO2-containing flue gas passes through one side of the PEEK HFC, while an advanced CO2-selective solvent flows on the other side. The CO2 permeates through the hollow fiber contactor pores and is chemically absorbed into the solvent. The CO2 rich solvent is regenerated in a second PEEK HFC module. Pilot-scale testing will be conducted with commercial size 8-inch diameter modules on 0.5 megawatt electrical (MWe) equivalent of coal-derived flue gas at the National Carbon Capture Center (NCCC). Continuous steady-state operation will be conducted for a minimum of two months to collect data necessary for further process scale-up. A techno-economic analysis and an environmental, health, and safety assessment will be completed to validate the potential of the PEEK HFC process to achieve DOE’s performance goals of a 90 percent CO2 capture rate with 95 percent CO2 purity at a cost of no more than $40 per tonne of CO2 captured by 2020.
Predecessor Project: DE-FE0004787
Successor Project: DE-FE0026383
The project focuses on scaling up a PEEK HFC to process the flue gas equivalent from 0.5 MWe power generation and conducting extended-duration testing on actual flue gas from the NCCC. The technology increases the effective interfacial gas/liquid contact area by a factor of 5 to 10 over conventional packed or tray columns, which translates to reduced space requirements with associated decreased capital and operating costs for the separation process. Economic analysis based on the previous bench-scale data suggests the cost ($/tonne of CO2 captured) of the HFC technology can be 36 percent lower than conventional amine-based technology. The PEEK HFC process has the potential to provide a step-change reduction in the cost of capturing CO2 from flue gas and is anticipated to meet DOE’s performance goals for a retrofit technology for CO2 captured from coal-fired power plants.
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