Lignin-derived heteroatom-doped porous carbons for supercapacitor and CO2 capture applications

Muslum Demir*, Tsemre Dingel Tessema, Ahmed A. Farghaly, Emmanuel Nyankson, Sushil K. Saraswat, Burak Aksoy, Timur Islamoglu, Maryanne M. Collinson, Hani M. El-Kaderi, Ram B. Gupta

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

84 Scopus citations


The present study reports the economic and sustainable syntheses of functional porous carbons for supercapacitor and CO2 capture applications. Lignin, a byproduct of pulp and paper industry, was successfully converted into a series of heteroatom-doped porous carbons (LHPCs) through a hydrothermal carbonization followed by a chemical activating treatment. The prepared carbons include in the range of 2.5 to 5.6 wt% nitrogen and 54 wt% oxygen in its structure. All the prepared carbons exhibit micro- and mesoporous structures with a high surface area in the range of 1788 to 2957 m2 g−1. As-prepared LHPCs as an active electrode material and CO2 adsorbents were investigated for supercapacitor and CO2 capture applications. Lignin-derived heteroatom-doped porous carbon 850 shows an outstanding gravimetric specific capacitance of 372 F g−1 and excellent cyclic stability over 30,000 cycles in 1 M KOH. Lignin-derived heteroatom-doped porous carbon 700 displays a remarkable CO2 capture capacity of up to 4.8 mmol g−1 (1 bar and 298 K). This study illustrates the effective transformation of a sustainable waste product into a highly functional carbon material for energy storage and CO2 separation applications.

Original languageEnglish (US)
Pages (from-to)2686-2700
Number of pages15
JournalInternational Journal of Energy Research
Issue number8
StatePublished - Jun 25 2018
Externally publishedYes


  • CO separation
  • biomass
  • chemical activation
  • heteroatom-doped carbon
  • hydrothermal carbonization
  • lignin
  • supercapacitor

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology


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