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Low-Viscosity Nonaqueous Sulfolane-Amine-Methanol Solvent Blend for Reversible CO2 Capture

Abstract

In this work, the absorption–desorption performance of CO2 in six new solvent blends of amine (diisopropylamine (DPA), 2-amino-2-methyl-1-propanol (AMP), methyldiethanolamine (MDEA), diethanolamine (DEA), diisopropanolamine (DIPA), and ethanolamine (MEA)), sulfolane, and methanol has been monitored using ATR-FTIR spectroscopy. Additionally, NMR-based species confirmation and solvent viscosity analysis were done for DPA solvent samples. The identified CO2 capture products are monomethyl carbonate (MMC), carbamate, carbonate, and bicarbonate anions in different ratios. The DPA solvent formed MMC entirely with 0.88 molCO2/molamine capture capacity, 0.48 molCO2/molamine cyclic capacity, and 3.28 mPa·s CO2-loaded solvent viscosity. MEA, DEA, DIPA, and MDEA were shown to produce a low or a negligible amount of MMC while AMP occupied an intermediate position.

Category

Academic article

Language

English

Author(s)

  • Jayangi Dinesha Wagaarachchige
  • Zulkifli Idris
  • Bjørnar Arstad
  • Nithin Bharadwaj Kummamuru
  • Kai Arne Sætre
  • Maths Halstensen
  • Klaus-Joachim Jens

Affiliation

  • University of South-Eastern Norway
  • SINTEF Industry / Process Technology

Year

2022

Published in

Industrial & Engineering Chemistry Research

ISSN

0888-5885

Publisher

American Chemical Society (ACS)

Volume

61

Issue

17

Page(s)

5942 - 5951

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