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Open AccessArticle

In Situ IR Study on Effect of Alkyl Chain Length between Amines on Its Stability against Acidic Gases

Department of Chemical Engineering, Kongju National University, 275 Budae-dong, Seobuk-gu, Cheonan-si 31080, Korea
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Catalysts 2019, 9(11), 910; https://doi.org/10.3390/catal9110910
Received: 28 September 2019 / Revised: 26 October 2019 / Accepted: 29 October 2019 / Published: 30 October 2019
For the CO2 capture process via the cyclic adsorption/desorption method, one emerging catalyst is the use of amine-functionalized silica. This study focused on comparing the CO2 capture performance of diamines with ethyl and propyl spacers and the degradation species formed after long-term exposure to various acidic gases such as SO2 and NO2 at elevated temperatures. Adsorbents were prepared via the incipient wetness technique and then subjected to thermogravimetric measurements and in situ FT-IR analyses. 2NS-P/Kona95, which contains a propyl spacer, showed fewer degradation species formed based on its IR spectra and better stability with its long-term exposure to various acidic gases. Thus, the incorporation of amines with a large number of nitrogen groups of propyl or longer spacer length could be a promising CO2 capture material. View Full-Text
Keywords: CO2 capture; catalytic amines; diaminosilane; propyl spacer; acidic gas; degradation; in situ IR CO2 capture; catalytic amines; diaminosilane; propyl spacer; acidic gas; degradation; in situ IR
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Pacia, R.M.; Manianglung, C.; Ko, Y.S. In Situ IR Study on Effect of Alkyl Chain Length between Amines on Its Stability against Acidic Gases. Catalysts 2019, 9, 910.

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