Novel M (Mg/Ni/Cu)-Al-CO 3 layered double hydroxides synthesized by aqueous miscible organic solvent treatment (AMOST) method for CO 2 capture

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

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Layered double hydroxides (LDHs) have been intensively studied in recent years owing to their great potential in CO 2 capture. However, the severe aggregation between platelets and low surface area restricted it from exhibiting very high CO 2 adsorption capacity and CO 2 /N 2 selectivity. In this research, we for the first time synthesized Ni-Al-CO 3 and Cu-Al-CO 3 LDHs using aqueous miscible organic solvent treatment (AMOST) method. The as-synthesized materials were evaluated for CO 2 adsorption at three different temperatures (50, 80, 120 °C) applicable to post-combustion CO 2 capture. Characterized with XRD, N 2 adsorption-desorption, TEM, EDX, and TGA, we found the newly synthesized Ni-Al-CO 3 LDH showed a nano-flower-like morphology comprising randomly oriented 2D nanoplatelets with both high surface area (249.45 m 2 /g) and pore volume (0.59 cc/g). Experimental results demonstrated that un-calcined Ni-Al-CO 3 LDH is superior in terms of CO 2 capture among the three LDHs, with a maximum CO 2 adsorption capacity of 0.87 mmol/g and the ideal CO 2 /N 2 selectivity of 166 at 50 °C under 1200 mbar for typical flue gas CO 2 /N 2 composition (CO 2 :N 2 = 15:85, v/v). This is the first report of a delaminated Ni-Al-CO 3 LDH showing better CO 2 capture performance than the well-reported optimal Mg layered double hydroxide.

Original languageEnglish
Pages (from-to)285-293
Number of pages9
JournalJournal of Hazardous Materials
Volume373
DOIs
Publication statusPublished - 2019 Jul 5

Fingerprint

Hydroxides
Carbon Monoxide
Organic solvents
hydroxide
Adsorption
adsorption
Platelets
Flue gases
surface area
Energy dispersive spectroscopy
Desorption
Agglomeration
Transmission electron microscopy
organic solvent
method
Chemical analysis
transmission electron microscopy
desorption
flower
combustion

Keywords

  • CO capture
  • CO /N selectivity
  • Layered double hydroxide
  • Ni-Al-CO

ASJC Scopus subject areas

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

Cite this

Novel M (Mg/Ni/Cu)-Al-CO 3 layered double hydroxides synthesized by aqueous miscible organic solvent treatment (AMOST) method for CO 2 capture . / Shang, Shanshan; Hanif, Aamir; Sun, Mingzhe; Tian, Yuanmeng; Ok, Yong Sik; Yu, Iris K.M.; Tsang, Daniel C.W.; Gu, Qinfen; Shang, Jin.

In: Journal of Hazardous Materials, Vol. 373, 05.07.2019, p. 285-293.

Research output: Contribution to journalArticle

Shang, Shanshan ; Hanif, Aamir ; Sun, Mingzhe ; Tian, Yuanmeng ; Ok, Yong Sik ; Yu, Iris K.M. ; Tsang, Daniel C.W. ; Gu, Qinfen ; Shang, Jin. / Novel M (Mg/Ni/Cu)-Al-CO 3 layered double hydroxides synthesized by aqueous miscible organic solvent treatment (AMOST) method for CO 2 capture In: Journal of Hazardous Materials. 2019 ; Vol. 373. pp. 285-293.
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T1 - Novel M (Mg/Ni/Cu)-Al-CO 3 layered double hydroxides synthesized by aqueous miscible organic solvent treatment (AMOST) method for CO 2 capture

AU - Shang, Shanshan

AU - Hanif, Aamir

AU - Sun, Mingzhe

AU - Tian, Yuanmeng

AU - Ok, Yong Sik

AU - Yu, Iris K.M.

AU - Tsang, Daniel C.W.

AU - Gu, Qinfen

AU - Shang, Jin

PY - 2019/7/5

Y1 - 2019/7/5

N2 - Layered double hydroxides (LDHs) have been intensively studied in recent years owing to their great potential in CO 2 capture. However, the severe aggregation between platelets and low surface area restricted it from exhibiting very high CO 2 adsorption capacity and CO 2 /N 2 selectivity. In this research, we for the first time synthesized Ni-Al-CO 3 and Cu-Al-CO 3 LDHs using aqueous miscible organic solvent treatment (AMOST) method. The as-synthesized materials were evaluated for CO 2 adsorption at three different temperatures (50, 80, 120 °C) applicable to post-combustion CO 2 capture. Characterized with XRD, N 2 adsorption-desorption, TEM, EDX, and TGA, we found the newly synthesized Ni-Al-CO 3 LDH showed a nano-flower-like morphology comprising randomly oriented 2D nanoplatelets with both high surface area (249.45 m 2 /g) and pore volume (0.59 cc/g). Experimental results demonstrated that un-calcined Ni-Al-CO 3 LDH is superior in terms of CO 2 capture among the three LDHs, with a maximum CO 2 adsorption capacity of 0.87 mmol/g and the ideal CO 2 /N 2 selectivity of 166 at 50 °C under 1200 mbar for typical flue gas CO 2 /N 2 composition (CO 2 :N 2 = 15:85, v/v). This is the first report of a delaminated Ni-Al-CO 3 LDH showing better CO 2 capture performance than the well-reported optimal Mg layered double hydroxide.

AB - Layered double hydroxides (LDHs) have been intensively studied in recent years owing to their great potential in CO 2 capture. However, the severe aggregation between platelets and low surface area restricted it from exhibiting very high CO 2 adsorption capacity and CO 2 /N 2 selectivity. In this research, we for the first time synthesized Ni-Al-CO 3 and Cu-Al-CO 3 LDHs using aqueous miscible organic solvent treatment (AMOST) method. The as-synthesized materials were evaluated for CO 2 adsorption at three different temperatures (50, 80, 120 °C) applicable to post-combustion CO 2 capture. Characterized with XRD, N 2 adsorption-desorption, TEM, EDX, and TGA, we found the newly synthesized Ni-Al-CO 3 LDH showed a nano-flower-like morphology comprising randomly oriented 2D nanoplatelets with both high surface area (249.45 m 2 /g) and pore volume (0.59 cc/g). Experimental results demonstrated that un-calcined Ni-Al-CO 3 LDH is superior in terms of CO 2 capture among the three LDHs, with a maximum CO 2 adsorption capacity of 0.87 mmol/g and the ideal CO 2 /N 2 selectivity of 166 at 50 °C under 1200 mbar for typical flue gas CO 2 /N 2 composition (CO 2 :N 2 = 15:85, v/v). This is the first report of a delaminated Ni-Al-CO 3 LDH showing better CO 2 capture performance than the well-reported optimal Mg layered double hydroxide.

KW - CO capture

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KW - Ni-Al-CO

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