Enzyme Based Membrane Reactor for CO₂ Capture

Facilitated transport of CO2 across a liquid membrane: Comparing enzyme, amine, and alkaline

“…where k cat is the turn-over number for CA, k CO 2 the rate constant for un-catalyzed CO 2 and H 2 O reaction (same as k 1a ), k OH is rate constant for CO 2 and OH − reaction (same as k 2a ) and K Eq is the chemical equilibrium constant for (7). Note that [OH − ] is a very small number.…”

“…Our prior work has focused on the development of a HFCLM reactor to support absorption and desorption in a single device driven only by partial pressure differences [7]. In one design the permeator is arranged much like a heat exchanger and consists of multiple sets of hollow fiber feed fibers and hollow fiber sweep fibers arranged orthogonally while a carrier fluid, the CLM, fills the space between the feed and sweep fiber bundles.…”

Hollow fiber contained hydrogel-CA membrane contactor for carbon dioxide removal from the enclosed spaces

“…Since the ultimate use of the technology will involve the separation of CO 2 from the spaces, in which the uppermost value of CO 2 is limited to no more than 0.5 vol.% at 101.325 kPa [1,3,6], it is important to perform experiments within this CO 2 concentration range. Fig.…”

“…For applications at low CO 2 concentration (<1 vol.%) and near ambient temperature, carbonic anhydrase (CA) is the most efficient catalyst for CO 2 hydration and dehydration, with a turnover number of 10 6 mol CO 2 mol −1 (CA) s −1 [2]. Using CA as a facilitator, the design of an immobilized liquid membrane (ILM), a supported liquid membrane (SLM) or a contained liquid membrane (CLM) has shown the potential to remove CO 2 from the closed spaces [3]. Compared to the ILM/SLM, the membrane stability of CLM design has been enhanced greatly by holding the aqueous solution within the interstitial space of hydrophobic surfaces [4].…”

Thermodynamic Feasibility of Enzymatic Reduction of Carbon Dioxide to Methanol

“…One strategy is to sequester CO 2 at its emission sources and bury it underground or in the ocean [1]. Since 1990, a variety of chemical [2][3][4], electrochemical [5], and biological [6][7][8][9] methodologies have been examined for CO 2 sequestration [10]. One profitable way, however, is to produce valuable chemicals even fuels from CO 2 .…”