Oxidation-stable amine-containing adsorbents for carbon dioxide capture

Nature Communications
Kyungmin MinMinkee Choi

Abstract

Amine-containing solids have been investigated as promising adsorbents for CO2capture, but the low oxidative stability of amines has been the biggest hurdle for their practical applications. Here, we developed an extra-stable adsorbent by combining two strategies. First, poly(ethyleneimine) (PEI) was functionalized with 1,2-epoxybutane, which generates tethered 2-hydroxybutyl groups. Second, chelators were pre-supported onto a silica support to poison p.p.m.-level metal impurities (Fe and Cu) that catalyse amine oxidation. The combination of these strategies led to remarkable synergy, and the resultant adsorbent showed a minor loss of CO2working capacity (8.5%) even after 30 days aging in O2-containing flue gas at 110 °C. This corresponds to a ~50 times slower deactivation rate than a conventional PEI/silica, which shows a complete loss of CO2uptake capacity after the same treatment. The unprecedentedly high oxidative stability may represent an important breakthrough for the commercial implementation of these adsorbents.

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Citations

Jul 20, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Mark R DowsettAlison Parkin
Jun 1, 2019·Chemical Society Reviews·Masoud Jahandar LashakiAbdelhamid Sayari
Apr 25, 2019·Nature Communications·Xia RongHengquan Yang
Oct 20, 2020·Chemical Society Reviews·Wanlin GaoSang-Eon Park
Jan 1, 2019·Energy & Environmental Science·Rebecca L SiegelmanJeffrey R Long
Apr 4, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Mahboubeh NabaviniaIman Noshadi
May 12, 2021·Chemical Reviews·Joel M KolleAbdelhamid Sayari
Jun 25, 2021·Chemical Science·Alexander C Forse, Phillip J Milner
Jul 30, 2021·Nature Materials·Rebecca L SiegelmanJeffrey R Long
Jul 20, 2019·ACS Applied Materials & Interfaces·Xingguang XuColin D Wood
Mar 21, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Mengmeng Deng, Hyung Gyu Park
Sep 24, 2019·ACS Applied Materials & Interfaces·Walter Christopher WilfongMcMahan L Gray
Jun 28, 2018·ACS Applied Materials & Interfaces·Kyungmin MinMinkee Choi
Apr 19, 2019·ACS Applied Materials & Interfaces·Chaehoon KimMinkee Choi

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Methods Mentioned

BETA
differential scanning calorimetry

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