A new choice of polymer precursor for solvent-free method: Preparation of N-enriched porous carbons for highly selective CO2 capture

Peixin Zhang, Yao Zhong, Jian Ding, Jun Wang, Mai Xu, Qiang Deng, Zheling Zeng, Shuguang Deng

Research output: Contribution to journalArticle

38 Scopus citations

Abstract

A facile one-pot melting-assisted and solvent-free method was successfully developed for the first time for preparing nitrogen-containing polymers. Followed by activation at temperatures ranging from 600 to 800 °C led to the formation of N-rich microporous carbons possessing narrow pore size distribution (ca. 0.5–3 nm), high specific surface area (ca. 1021.4–3657.0 m2 g−1), large pore volume (ca. 0.43–2.00 cm3 g−1) and high nitrogen content (ca. up to 5.11 wt%). Particularly, the porous carbons exhibited outstanding CO2 adsorption capacity of 2.65 and 7.38 mmol g−1 at 273 K and 0.15 and 1 bar, respectively; meanwhile, it also exhibited extremely large CO2 storage capacity of 22.06 mmol g−1 at 298 K and 20 bar. Moreover, the outstanding CO2/N2, CO2/CH4 and CH4/N2 selectivity up to 36.5, 6.9 and 5.1 at 298 K and 1 bar were achieved. The determinant factors on CO2 capture at 0.15, 1 and 20 bar were carefully investigated. Furthermore, this method could be 10-fold scaled up to produce almost identical high-performance carbons. For real-world applications, pressure/vacuum swing adsorption (P/VSA) working capacity, gas-mixture transit breakthrough experiment, and recycle feasibility are evaluated. Thus, these novel materials are promising candidates for CO2 capture from dilute gas mixtures.

Original languageEnglish (US)
Pages (from-to)963-973
Number of pages11
JournalChemical Engineering Journal
Volume355
DOIs
StatePublished - Jan 1 2019

Keywords

  • Biogas upgrading
  • CO capture
  • IAST selectivity
  • N-doped porous carbon
  • Solvent-free method

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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