Fine-Tuning of the Carbon Dioxide Capture Capability of Diamine-Grafted Metal–Organic Framework Adsorbents Through Amine Functionalization

Hyuna Jo, Woo Ram Lee, Nam Woo Kim, Hyun Jung, Kwang Soo Lim, Jeong Eun Kim, Dong Won Kang, Hanyeong Lee, Vishwanath Hiremath, Jeong Gil Seo, Hailian Jin, Dohyun Moon, Sang Soo Han, Chang Seop Hong

Research output: Contribution to journalArticlepeer-review

58 Citations (Scopus)

Abstract

A combined sonication and microwave irradiation procedure provides the most effective functionalization of ethylenediamine (en) and branched primary diamines of 1-methylethylenediamine (men) and 1,1-dimethylethylenediamine (den) onto the open metal sites of Mg2(dobpdc) (1). The CO2capacities of the advanced adsorbents 1-en and 1-men under simulated flue gas conditions are 19 wt % and 17.4 wt %, respectively, which are the highest values reported among amine-functionalized metal-organic frameworks (MOFs) to date. Moreover, 1-den exhibits both a significant working capacity (12.2 wt %) and superb CO2uptake (11 wt %) at 3 % CO2. Additionally, this framework showcases the superior recyclability; ultrahigh stability after exposure to O2, moisture, and SO2; and exceptional CO2adsorption capacity under humid conditions, which are unprecedented among MOFs. We also elucidate that the performance of CO2adsorption can be controlled by the structure of the diamine ligands grafted such as the number of amine end groups or the presence of side groups, which provides the first systematic and comprehensive demonstration of fine-tuning of CO2uptake capability using different amines.

Original languageEnglish
Pages (from-to)541-550
Number of pages10
JournalChemSusChem
Volume10
Issue number3
DOIs
Publication statusPublished - 2017 Feb 8

Keywords

  • amine
  • carbon dioxide capture
  • functionalization
  • metal–organic frameworks
  • working capacity

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

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