In this paper, three of the leading options for large scale CO2 capture are reviewed from a technical perspective. We consider solvent-based chemisorption techniques, carbonate looping technology, and the so-called oxyfuel process. For each technology option, we give an overview of the technology, listing advantages and disadvantages. Subsequently, a discussion of the level of technological maturity is presented, and we conclude by identifying current gaps in knowledge and suggest areas with significant scope for future work. We then discuss the suitability of using ionic liquids as novel, environmentally benign solvents with which to capture CO2. In addition, we consider alternatives to simply sequestering CO2—we present a discussion on the possibility of recycling captured CO2 and exploiting it as a C1 building block for the sustainable manufacture of polymers, fine chemicals, and liquid fuels. Finally, we present a discussion of relevant systems engineering methodologies in carbon capture system design.

/pdf/an-overview-of-co2-capture-technologies-54l9xz6nfq.pdf

An overview of CO2 capture technologies

The Maxwell-Stefan approach to mass transfer

Global warming resulting from the emission of greenhouse gases, especially CO2, has become a widespread concern in the recent years. Though various CO2 capture technologies have been proposed, chemical absorption and adsorption are currently believed to be the most suitable ones for post-combustion power plants. The operation of the chemical absorption process is reviewed in this work, together with the use of absorbents, such as the ionic liquid, alkanolamines and their blended aqueous solutions. The major concerns for this technology, including CO2 capture efficiency, absorption rate, energy required in regeneration, and volume of absorber, are addressed. For adsorption, in addition to physical adsorbents, various mesoporous solid adsorbents impregnated with polyamines and grafted with aminosilanes are reviewed in this work. The major concerns for selection of adsorbent, including cost, adsorption rate, CO2 adsorption capacity, and thermal stability, are compared and discussed. More effective and less energy-consuming regeneration techniques for CO2-loaded adsorbents are also proposed. Future works for both absorption and adsorption are suggested.

/pdf/a-review-of-co2-capture-by-absorption-and-adsorption-5eczh2835p.pdf

A Review of CO2 Capture by Absorption and Adsorption

Hollow fiber membrane contactors

Methods and apparatus relate to recovery of carbon dioxide and/or hydrogen sulfide from a gas mixture. Separating of the carbon dioxide, for example, from the gas mixture utilizes a liquid sorbent for the carbon dioxide. The liquid sorbent contacts the gas mixture along asymmetric hollow-fiber membranes that enable transfer of the carbon dioxide from the gas mixture to the liquid sorbent.

Hollow-fiber membrane contactors

https://ris.utwente.nl/ws/files/6485446/Versteeg88on.pdf

On the kinetics between CO2 and alkanolamines both in aqueous and non-aqueous solutions—I. Primary and secondary amines

https://ris.utwente.nl/ws/files/6739600/Beenackers93mass.pdf

Mass transfer in gas-liquid slurry reactors

https://ris.utwente.nl/ws/files/6408930/Kreulen93microporous.pdf

Microporous hollow fibre membrane modules as gas-liquid contactors. Part 1: Physical mass transfer processes. A specific application: mass transfer in highly viscous liquids

https://pure.rug.nl/ws/files/3306955/1993JMembrSciKreulen2.pdf

Microporous hollow fibre membrane modules as gas-liquid contactors Part 2. Mass transfer with chemical reaction

https://ris.utwente.nl/ws/files/6773844/Kreulen93determination.pdf

W.P.M. van Swaaij

Papers

On the kinetics between CO2 and alkanolamines both in aqueous and non-aqueous solutions—I. Primary and secondary amines

Mass transfer in gas-liquid slurry reactors

Microporous hollow fibre membrane modules as gas-liquid contactors. Part 1: Physical mass transfer processes. A specific application: mass transfer in highly viscous liquids

Microporous hollow fibre membrane modules as gas-liquid contactors Part 2. Mass transfer with chemical reaction

Determination of mass transfer rates in wetted and non-wetted microporous membranes