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

1 Citation (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

Fingerprint

Nanosheets
Carbon Monoxide
Adsorbents
adsorption
Adsorption
Temperature
surface area
Nanoflowers
Methanation
Water gas shift
Functional materials
temperature
transition element
Global warming
Platelets
Gasification
Pore size
Transition metals
Sorption
transmission electron microscopy

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

Cite this

Exfoliated Ni-Al LDH 2D nanosheets for intermediate temperature CO 2 capture . / Hanif, Aamir; Sun, Mingzhe; Shang, Shanshan; Tian, Yuanmeng; Yip, Alex C.K.; Ok, Yong Sik; Yu, Iris K.M.; Tsang, Daniel C.W.; Gu, Qinfen; Shang, Jin.

In: Journal of Hazardous Materials, 15.07.2019, p. 365-371.

Research output: Contribution to journalArticle

Hanif, A, Sun, M, Shang, S, Tian, Y, Yip, ACK, Ok, YS, Yu, IKM, Tsang, DCW, Gu, Q & Shang, J 2019, ' Exfoliated Ni-Al LDH 2D nanosheets for intermediate temperature CO 2 capture ', Journal of Hazardous Materials, pp. 365-371. https://doi.org/10.1016/j.jhazmat.2019.04.049
Hanif, Aamir ; Sun, Mingzhe ; Shang, Shanshan ; Tian, Yuanmeng ; Yip, Alex C.K. ; Ok, Yong Sik ; Yu, Iris K.M. ; Tsang, Daniel C.W. ; Gu, Qinfen ; Shang, Jin. / Exfoliated Ni-Al LDH 2D nanosheets for intermediate temperature CO 2 capture In: Journal of Hazardous Materials. 2019 ; pp. 365-371.
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