PlumX Metrics
Embed PlumX Metrics

Amine-Functionalized Mil-101(Cr) Fibers for Direct Air Capture at Cold Temperatures Using Rapid Temperature Vacuum Swing Adsorption

SSRN, ISSN: 1556-5068
2023
  • 1
    Citations
  • 345
    Usage
  • 0
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    1
    • Citation Indexes
      1
  • Usage
    345
    • Abstract Views
      272
    • Downloads
      73
  • Ratings
    • Download Rank
      657,573

Article Description

Given that most of the world shows annual temperatures lower than 25 °C and some regions exhibit a large diurnal temperature difference in a single day, it is desirable to explore the CO2 sorption behavior of materials not only at ambient (25 °C) but also at cooler, “sub-ambient” conditions (defined here a <25 °C). These cold temperatures may offer advantages for DAC such as higher gas adsorption capacities and lower absolute humidity, reducing concomitant water adsorption. Here, amine-functionalized MIL-101(Cr) fibers are evaluated at cold temperatures using rapid temperature vacuum swing adsorption (RTVSA). MIL-101(Cr)/cellulose acetate fibers loaded with macromolecular amines are evaluated as practical gas-solid contactors. As spun MIL-101(Cr) fibers show desirable properties for use as structured contactors such as high permeance and low pressure drop. Breakthrough and RTVSA experiments are conducted in the presence of humidity at sub-ambient temperatures to understand the CO2 adsorption and desorption behavior of the sorbent/contactor under conditions approaching practical operation. With optimized amine loading, the PEI-MIL-101(Cr) fibers give CO2 capacities comparable to the powder form of the sorbent, as well as sharp breakthrough curves at fast flow rates (1.4 m/s superficial velocity) suggesting the system is not limited by additional mass transfer resistances under the tested conditions. RTVSA shows fast desorption kinetics (14.4 mmol of CO2/g of fiber/h) at moderate desorption conditions, at 0.1 bar vacuum with temperatures below 80 °C. The entire cycle during RTVSA finishes in ~25 minutes with ~76 mol% CO2 purity as the product in this initial, modestly optimized study.

Bibliographic Details

Min Gyu Song; Guanhe Rim; Yuxiang Wang; Isaiah Borne; Christopher W. Jones; Ryan P. Lively

Elsevier BV

Multidisciplinary; Cold temperature DAC; Fiber contactor; Temperature vacuum swing adsorption; Amine functionalized MOFs

Provide Feedback

Have ideas for a new metric? Would you like to see something else here?Let us know