Klingberg Patrik, Wilkner Kai, Schlüter Markus, Grünauer Judith, Shishatskiy Sergey
Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Planck-Straße 1, 21502 Geesthacht, Germany.
Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research, IEK-1: Materials Synthesis and Processing, D-52425 Jülich, Germany.
Membranes (Basel). 2019 Mar 4;9(3):35. doi: 10.3390/membranes9030035.
The separation of carbon dioxide from coal-fired power plant flue gases using a CO₂/N₂-selective supported ionic liquid membrane (SILM) was investigated and the performance and stability of the membrane during operation are reported. The membrane is composed of a polyacrylonitrile (PAN) ultrafiltration membrane as a support and a selective layer of an ionic liquid (IL), 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM Tf2N). The feasibility of large-scale SILM production was demonstrated by the formation of a square-meter-scale membrane and preparation of a membrane module. A flat-sheet envelope-type SILM module containing 0.67 m² of the membrane was assembled. Prior to real flue gas operation, the separation behaviour of the membrane was investigated with single gases. The stability of the SILM during the test stand and pilot plant operation using real power plant flue gases is reported. The volume fraction of carbon dioxide in the flue gas was raised from approx. 14 vol. % (feed) to 40 vol. % (permeate). However, issues concerning the membrane stability were found when SO₃ aerosols in large quantities were present in the flue gas.
研究了使用CO₂/N₂选择性支撑离子液体膜（SILM）从燃煤电厂烟道气中分离二氧化碳的方法，并报告了该膜在运行过程中的性能和稳定性。该膜由聚丙烯腈（PAN）超滤膜作为支撑体和离子液体（IL）1-乙基-3-甲基咪唑双（三氟甲基磺酰）亚胺（EMIM Tf2N）的选择性层组成。通过制备平方米规模的膜和膜组件，证明了大规模生产SILM的可行性。组装了一个包含0.67平方米膜的平板信封式SILM组件。在实际烟道气运行之前，用单一气体研究了该膜的分离行为。报告了使用实际电厂烟道气时，SILM在试验台和中试装置运行期间的稳定性。烟道气中二氧化碳的体积分数从约14体积%（进料）提高到40体积%（渗透物）。然而，当烟道气中存在大量SO₃气溶胶时，发现了有关膜稳定性的问题。
