Fully organic CO2 absorbent obtained by a Schiff base reaction between branched poly(ethyleneimine) and glutaraldehyde

Ki Seob Hwang, Hee Young Park, Jung Hyun Kim, Jun Young Lee

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)


We used a water-in-oil emulsification method to prepare particulate CO2 absorbents from branched poly(ethyleneimine) (PEI), utilizing 13C nuclear magnetic resonance spectroscopy to determine the amount of free PEI NH2 groups and thus calculate the required cross-linker amount. The functional groups and reactivity of branched PEI particles were characterized by Fourier transform infrared spectroscopy, and their CO2 absorption capacity was determined by thermogravimetric analysis. Dynamic light scattering measurements showed that the synthesized particles exhibited sizes of 0.2-2 μm and high surface areas, which resulted in high CO2 absorption capacities of up to 2.18 mmol CO2 per gram sorbent at 75 °C.

Original languageEnglish
Pages (from-to)798-804
Number of pages7
JournalKorean Journal of Chemical Engineering
Issue number3
Publication statusPublished - 2018 Mar 1

Bibliographical note

Funding Information:
This work was supported by Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry (IPET) through Technology Commercialization Support Program, funded by Ministry of Agriculture, Food and Rural Affair (MAFRA) (815002).

Publisher Copyright:
© 2018, Korean Institute of Chemical Engineers, Seoul, Korea.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)


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