title: Stability of a Benzyl Amine Based CO2Capture Adsorbent in View of Regeneration Strategies.
abstract: In this work, the chemical and thermal stability of a primary amine-functionalized ion-exchange resin (Lewatit VP OC 1065) is studied in view of the potential options of regenerating this sorbent in a CO2removal application. The adsorbent was treated continuously in the presence of air, different O2/CO2/N2mixtures, concentrated CO2, and steam, and then the remaining CO2adsorption capacity was measured. Elemental analysis, BET/BJH analysis, Fourier transform infrared spectroscopy, and thermogravimetric analysis were applied to characterize adsorbent properties. This material was found to be thermally and hydrothermally stable at high temperatures. However, significant oxidative degradation occurred already at moderate temperatures (above 70 °C). Temperatures above 120 °C lead to degradation in concentrated dry CO2. Adding moisture to the concentrated CO2stream improves the CO2-induced stability. Adsorbent regeneration with nitrogen stripping is studied with various parameters, focusing on minimizing the moles of purge gas required per mole of CO2desorbed.
authors.affiliation: Sustainable Process Technology (SPT), Faculty of Science and Technology, University of Twente , PO Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Qian
authors.initials: Q
authors.lastname: Yu
authors.affiliation: Sustainable Process Technology (SPT), Faculty of Science and Technology, University of Twente , PO Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Jorge de la P
authors.initials: JP
authors.lastname: Delgado
authors.affiliation: Sustainable Process Technology (SPT), Faculty of Science and Technology, University of Twente , PO Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Rens
authors.initials: R
authors.lastname: Veneman
authors.affiliation: Sustainable Process Technology (SPT), Faculty of Science and Technology, University of Twente , PO Box 217, 7500 AE Enschede, The Netherlands.
authors.forename: Derk W F
authors.initials: DW
authors.lastname: Brilman