A Microvascular System for Chemical Reactions Using Surface Waste Heat

Microfluidic Studies of Carbon Dioxide

“…c) Schematic of the proposed CO 2 stripping process from saturated MEA by flowing through a microchannel patterned around a heat source. The released CO 2 formed bubbles in the microchannel 63. Reprinted with permission from the American Chemical Society, 2014 (a,b) and from Wiley‐VCH, 2013 (c).…”

“…This approach was tested by fabricating a microchannel around a heat source, in order to study the CO 2 release rate and the total amount of released CO 2 from MEA for different microchannel geometries and heat source temperatures (Figure 4 c). 63 Upon transfer of CO 2 from the CO 2 ‐saturated MEA, small CO 2 bubbles appeared in the MEA solution. The CO 2 removal rate and the total amount of the released CO 2 were measured with an infrared CO 2 meter and a gas mass flow‐meter, and were further confirmed by optically monitoring the volume and the flow rate of the released CO 2 plugs in the microchannels.…”

Ultrasonic Enhancement of CO2 Desorption from MDEA Solution in Microchannels

“…The obtained mass transfer coefficient was 1 order of magnitude greater than that in conventional packed tower, which was attributed to the reduction in the thickness of liquid film. Nguyen et al 15 found that rapid and complete CO 2 desorption was realized when channel diameter was below 300 μm, also indicating the advantages of using microchannel reactors in desorption process. Similarly, our previous work 16 showed that the mass transfer coefficients of the CO 2 desorption process in the microchannel were 1 order of magnitude higher than those in conventional columns.…”