Evaluation of the gas absorption performance of a flow-type hydrate-based gas uptake system

Absorption of CO2 by Tetra-n-Butylammonium Bromide Semiclathrate Hydrate Slurries in a Bubble Column with Temperature Swing

“…In fact, although the rate of hydrate growth in a stirred tank is an issue, 4 the volumetric mass transfer coefficient with hydrate formation in a bubble column is more than 10 times that without the hydrate formation. 22 If the pressure is increased to promote absorption, then higher mass flow rates are required to obtain the same volumetric gas flow rate, increasing compression costs. For the case of increasing the pressure by 1 MPa, that is, from 5 to 6 MPa, CO 2 gas consumption is equivalent to decreasing the temperature by 2 K (from 278 to 276 K).…”

“…Furthermore, bubble columns can be expected to form hydrates more efficiently than hydrates formed at a horizontal gas–liquid interface. In fact, although the rate of hydrate growth in a stirred tank is an issue, the volumetric mass transfer coefficient with hydrate formation in a bubble column is more than 10 times that without the hydrate formation . If the pressure is increased to promote absorption, then higher mass flow rates are required to obtain the same volumetric gas flow rate, increasing compression costs.…”