(368cg) Enhancing Oxidation Stability of Amine containing CO2 Adsorbents using Hydroxyethyl Starch

CO₂ adsorption, Selective SO₂ capture, Oxidation stability, Adsorbent development, Water purification, Waste to value-added products, and Material characterization.

About the author:

I am a doctoral candidate specialized in the development of adsorbents for CO₂ capture, with a strong academic background and hands-on experience in material design, synthesis, characterization, and performance analysis. My current research focuses on enhancing CO₂ uptake, oxidation stability and selectivity of amine-functionalized adsorbents for industrial applications. I am actively seeking roles in a related field and will be graduating by the start of April 2025.

Abstract

Amine-based adsorbents are widely used for CO₂ capture. However, one of the biggest hurdles for their further development is their limited oxidation stability. Moreover, methods developed to improve the oxidation stability often lead to significant decrease in their CO₂ uptake. Here, we investigated the effect of hydroxyethyl starch (HES) on the CO₂ uptake and oxidation stability of impregnated polyethylenimine (PEI) adsorbents. Performance of HES-PEI co-impregnated materials was evaluated under different oxidation conditions using CO₂ uptake measurements, and mass spectrometry. The effect of HES was compared with other hydroxyl-containing additives such as PVA and PEG, as well as to epoxide functionalization of PEI (EB-PEI). The oxidation stability of PEI upon addition of HES was found to be comparable to EB-PEI containing adsorbent; however, its CO₂ uptake, based on PEI, was twice as high. In addition, oxidation stability of supported HES-PEI was significantly higher than unmodified PEI as well as PVA-PEI and PEG-PEI co-impregnated adsorbents.

Teaching and Mentoring Experience: