Nitrogen-doped porous carbons for highly selective CO2 capture from flue gases and natural gas upgrading

Jun Wang, Rajamani Krishna, Jiangfeng Yang, Kodanda Phani Raj Dandamudi, Shuguang Deng

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Nitrogen-doped microporous activated carbon adsorbents were synthesized by a self-template method with KOH as the porogen agent at pyrolysis temperatures of 600, 700, and 800°C. The carbon adsorbent samples were characterized with N2 adsorption at 77K, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermal gravimetric analysis, Raman spectroscopy, Fourier transformed infrared spectroscopy, and energy-dispersive X-ray spectroscopy mapping. Single component gas adsorption equilibrium of CO2, CH4, and N2 on the carbon adsorbents were measured at gas pressures up to 100kPa and temperatures of 273, 298, and 323K. Adsorption breakthrough performance of a fixed bed packed with the carbon adsorbents for separation of CO2/CH4/N2 gas mixture was simulated using the adsorption equilibrium data collected in this work. A high CO2 adsorption capacity (6.36mmolg-1 on N-AC 600 at 100kPa and 273K) and large selectivites for the separation of CO2/CH4 (9.2), CO2/N2 (47.3) and CH4/N2 (3.6) mixtures were achieved with the carbon adsorbents due to their N-containing groups, narrow pore size distribution, and large specific surface area. The nitrogen-doped porous carbon adsorbents look very promising for flue gas treatment and natural gas upgrading applications.

Original languageEnglish (US)
Pages (from-to)156-165
Number of pages10
JournalMaterials Today Communications
Volume4
DOIs
StatePublished - Sep 1 2015
Externally publishedYes

Fingerprint

Flue gases
Adsorbents
Natural gas
Nitrogen
Carbon
Adsorption
Effluent treatment
Gas adsorption
Gravimetric analysis
Packed beds
Gas mixtures
Specific surface area
Activated carbon
Pore size
Raman spectroscopy
Infrared spectroscopy
Pyrolysis
Gases
Transmission electron microscopy
X ray diffraction

Keywords

  • Activated carbon
  • Breakthrough simulation
  • CO<inf>2</inf> capture
  • Natural-gas upgrading
  • Nitrogen-doped

ASJC Scopus subject areas

  • Mechanics of Materials
  • Materials Science(all)
  • Materials Chemistry

Cite this

Nitrogen-doped porous carbons for highly selective CO2 capture from flue gases and natural gas upgrading. / Wang, Jun; Krishna, Rajamani; Yang, Jiangfeng; Dandamudi, Kodanda Phani Raj; Deng, Shuguang.

In: Materials Today Communications, Vol. 4, 01.09.2015, p. 156-165.

Research output: Contribution to journalArticle

Wang, Jun ; Krishna, Rajamani ; Yang, Jiangfeng ; Dandamudi, Kodanda Phani Raj ; Deng, Shuguang. / Nitrogen-doped porous carbons for highly selective CO2 capture from flue gases and natural gas upgrading. In: Materials Today Communications. 2015 ; Vol. 4. pp. 156-165.
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