13C-NMR Study of Acid Dissociation Constant (pKa) Effects on the CO2 Absorption and Regeneration of Aqueous Alkanolpiperidine

Yukio Furukawa*, Hirotaka Koriki, Daiki Shuto, Hiroshi Sato, Yasuro Yamanaka


研究成果: Conference article査読

2 被引用数 (Scopus)


We have studied the formation rates of HCO3-/CO32-, amine/protonated amine, carbamate/protonated carbamate, and carbonate/protonated carbonate in the course of CO2 absorption at room temperature, and composition changes and CO2 release upon heating at 93 °C for 30 min for aqueous solutions of 9 kinds of alkanolpiperidines using 13C-NMR spectroscopy. The pKa values of these alkanolpiperidines were measured. The initial CO2 capture rates of alkanolpiperidines do not depend on their pKa values, which is quite different from general trends of aqueous amine absorbents. The CO2 release amount of each alkanolpiperidine increased with decreasing pKa, as a general trend. The CO2 release amounts of 1-HE-PD, 2-HM-1-M-PD, 3-HM-1-M-PD, and 4-HM-1-M-PD increased with increasing concentrations.

ジャーナルEnergy Procedia
出版ステータスPublished - 2017
イベント13th International Conference on Greenhouse Gas Control Technologies, GHGT 2016 - Lausanne, Switzerland
継続期間: 2016 11 142016 11 18

ASJC Scopus subject areas

  • エネルギー(全般)


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