One-pot synthesis of novel porous carbon adsorbents derived from poly vinyl chloride for high methane adsorption uptake

Hae In Park, Joonhee Kang, Jong Ho Park, Ji Chan Park, Jongkee Park, Ki Bong Lee, Chan Hyun Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Owing to the increasing interest in the production of “turquoise” hydrogen, various methods for capturing and recycling unreacted methane as a reactant have been reported. Porous carbon adsorbents can efficiently capture large amounts of methane based on the pore structure and reduce the adsorption column size due to its low density. Herein, we report a one-pot synthesis for preparing porous carbon adsorbents by thermally treating poly(vinyl chloride) or chlorinated poly(vinyl chloride)/KOH admixtures under Ar flow and characterize their methane adsorption properties. The Ar adsorption measurements indicated that the prepared porous carbon adsorbents have uniform pore sizes (between 0.4 and 0.8 nm), in addition to a large Brunauer–Emmett–Teller (BET) surface area and micropore volume. The unique textural properties contributed significantly to the superior methane adsorption performances. In particular, the cPVCK800 sample exhibited the highest CH4 adsorption uptake of 3.17 mmol/g at 25 °C. Density functional theory calculations revealed that functionalized pore structures also significantly improve the CH4 adsorption properties.

Original languageEnglish
Article number135867
JournalChemical Engineering Journal
Volume440
DOIs
Publication statusPublished - 2022 Jul 15

Keywords

  • CH adsorption
  • Density functional theory calculation
  • Narrow micropore
  • Poly vinyl chloride
  • Porous carbon

ASJC Scopus subject areas

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

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