Abstract
Herein we demonstrate mesoporous frameworks interacting with carbon dioxide leading to stimulated structural contractions and massive out‐of‐equilibrium pressure amplification well beyond ambient pressure. Carbon dioxide, a non‐toxic and non‐flammable working medium, is promising for the development of pressure‐amplifying frameworks for pneumatic technologies and safety systems. The strong interaction of the fluid with the framework even contracts DUT‐46, a framework hitherto considered as non‐flexible. Synchrotron‐based in situ PXRD/adsorption experiments reveal the characteristic contraction pressure for DUT‐49 pressure amplification in the range of 350–680 kPa. The stimulated framework contraction expels 1.1 to 2.4 mmol g−1 CO2 leading to autonomous pressure amplification in a pneumatic demonstrator system up to 428 kPa. According to system level estimations even higher theoretical pressure amplification may be achieved between 535 and 1011 kPa.
Highlights
Massive pressure amplification by stimulated contraction of mesoporous frameworks Volodymyr Bon*, Simon Krause, Irena Senkovska, Nico Grimm, Dirk Wallacher, Daniel M
Abstract: we demonstrate mesoporous frameworks interacting with carbon dioxide leading to stimulated structural contractions and massive out-of-equilibrium pressure amplification well beyond ambient pressure
The stimulated framework contraction expels 1.1 to 2.4 mmol g-1 CO2 leading to autonomous pressure amplification in a pneumatic demonstrator system up to 428 kPa
Summary
Analysis of in situ PXRD patterns measured upon adsorption of CO2 2.2. Physisorption of N2 (77K) and CO2 on DUT-46, DUT-49 and DUT-50 2.3. Analysis of adsorption profile for NGA 2.4. Calculation of the pressure amplification for DUT-49 and DUT-50 2.5.
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