Efficient Dynamic Phase Splitting Driven by Centrifugal Force for CO Capture from Flue Gas using Biphasic Solvents.

Carbon dioxide (CO) chemisorption using biphasic solvents has been regarded as a promising approach, but challenges remain in achieving efficient dynamic phase-splitting during practical implementation. To address this, the centrifugal force was innovatively adopted to enhance the coalescence and separation of immiscible fine droplets within the biphasic solvent. The comprehensive evaluation demonstrates that centrifugal phase-splitting shows outstanding separation efficiency (>95%) and excellent applicability for various solvents.

Energy-Efficient Biphasic Solvents for Industrial Carbon Capture: Role of Physical Solvents on CO Absorption and Phase Splitting.

Physical solvent is a promising alternative for the phase splitting of solvent to drastically reduce the regeneration energy during CO capture. Here, an aqueous biphasic solvent, optimally composed of 30 wt % polyamine (, -dimethylpropylamine, DMPA) and 50 wt % physical solvent (polyethyleneglycol dimethyl ether, NHD), is prepared, which presents high cyclic loading, low regeneration energy, and good stability. L(4) orthogonal tests are performed to comprehensively evaluate the mass-transfer kinetics and the effect of crucial conditions, verifying the weak effect of NHD solvent on mass transfer.