CO2 adsorption using water-soluble polyaspartamide

Jacob Masiala Ngoy, Michael O. Daramola, Tafara Leonard Chitsiga, Rosemary Falcon, Nicola Wagner

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Freeze-drying is one of the promising purification technologies due to its ability to produce outputs with high purity at low energy. This work attempts to improve the adsorption properties of a novel amine adsorbent for CO2 capture through the use of freeze drying process. Thus, a polyaspartamide (PAA) was produced after freeze-drying process of a polysuccinimide (PSI) synthesized through polycondensation reaction. The synthesized PSI was grafted with a monoethanolamine (MEA), a water-soluble amine, and an ethylenediamine (EDA), then tested for CO2 capture. The BET analysis showed the enhancement of geometry/structure with the increase of water-soluble amine (MEA) in the PAA. In addition, testing the CO2 adsorption capacity with pure CO2 at 1.1 bar and a temperature of 40 °C using a thermogravimetric analyser resulted in increase of CO2 adsorption capacity as the amount of MEA in PAA increased. The maximum CO2 adsorbed was 44 mg-CO2/g at 100% MEA incorporated in PAA, indicating a significant increase from 19 mg-CO2/g recorded for the crude PSI. Thus, the water soluble PAA could be an effective adsorbent for CO2 capture via adsorption technology for the reduction of CO2 emissions in future.

Original languageEnglish
Pages (from-to)139-144
Number of pages6
JournalSouth African Journal of Chemical Engineering
Publication statusPublished - Jun 2017


  • CO adsorption
  • Freeze-drying
  • Polyaspartamide
  • Water-soluble

ASJC Scopus subject areas

  • Catalysis
  • Education
  • Energy (miscellaneous)
  • Process Chemistry and Technology
  • Fluid Flow and Transfer Processes
  • Filtration and Separation


Dive into the research topics of 'CO2 adsorption using water-soluble polyaspartamide'. Together they form a unique fingerprint.

Cite this