Exfoliated Ni-Al LDH 2D nanosheets for intermediate temperature CO 2 capture

Aamir Hanif, Mingzhe Sun, Shanshan Shang, Yuanmeng Tian, Alex C.K. Yip, Yong Sik Ok, Iris K.M. Yu, Daniel C.W. Tsang, Qinfen Gu, Jin Shang

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

CO 2 capture is projected as one of the pragmatic approaches to deal with the global warming phenomenon. Adsorption-based CO 2 capture is considered an economically attractive option to reduce CO 2 emission. The success of the adsorption-based capture primarily relies on adsorbents and thus a variety of adsorbents have been investigated in the literature. We here report a high surface area (210.2 m 2 /g) exfoliated Ni-Al LDH nanoplatelet as a promising candidate for CO 2 capture at an intermediate temperature of 200 °C applicable to integrated gasification combined cycle (IGCC) and sorption enhanced water gas shift (SEWGS) reactions. The materials were well characterized by PXRD, TGA, FTIR, TEM, ICP-OES, and N 2 adsorption surface area, and pore size distribution techniques. A unique nanoflower morphology comprising of exfoliated LDH platelets of ca. 5 layer thickness was obtained. The CO 2 capture capacity (0.66 mmol/g) of the exfoliated Ni-Al LDH nanoplatelet is comparable to that of the widely reported Mg-Al LDH-derived mixed oxides and MgO-based adsorbents. Provided that Ni-Al and other transition metal LDH materials are known to exhibit superior catalytic properties for CO 2 methanation, this work could pave the way for development of dual-functional materials for CO 2 capture and conversion.

Original languageEnglish
Pages (from-to)365-371
Number of pages7
JournalJournal of Hazardous Materials
DOIs
Publication statusPublished - 2019 Jul 15

Keywords

  • CO capture
  • Exfoliation
  • Nanosheets
  • Ni-Al LDH

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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    Hanif, A., Sun, M., Shang, S., Tian, Y., Yip, A. C. K., Ok, Y. S., Yu, I. K. M., Tsang, D. C. W., Gu, Q., & Shang, J. (2019). Exfoliated Ni-Al LDH 2D nanosheets for intermediate temperature CO 2 capture Journal of Hazardous Materials, 365-371. https://doi.org/10.1016/j.jhazmat.2019.04.049