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Preparation and characterization of chars and activated carbons from wood wastes

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2021, 31(5), pp.941-956
  • DOI : 10.1007/s42823-020-00205-2
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : August 20, 2020
  • Accepted : November 5, 2020
  • Published : October 1, 2021

Yan Qiangu 1 Li Jinghao 2 Cai Zhiyong 2

1Ligwood LLC
2Forest Products Laboratory, USDA Forest Service

Accredited

ABSTRACT

Preparation of activated carbons from wood waste including northern hardwood pins-fnes and wood dust was conducted and then compared through the following methods: physical pyrolysis and CO2 activation, vacuum pyrolysis and CO2 activation, CO2 gasifcation, and vacuum CO2 gasifcation processes. Experimental results show that chars and activated carbons with high surface area and pore volume are produced from wood waste through a vacuum CO2 pyrolysis/gasifcation process. The efects of operation variables of vacuum pyrolysis/gasifcation on the properties of chars and activated carbons were investigated to identify and optimize the temperature, heating time, and heating rate. The optimized vacuum CO2 gasifcation conditions were found to be a temperature of 800 °C, a heating rate of 20 °C/min, and a holding time of 2 h respectively. The prepared wood-chars and activated carbons were characterized by nitrogen physisorption, scanning electron microscopy (SEM). Fourier transform infrared (FTIR) spectra determined any changes in the surface functional groups produced during diferent preparation stages.

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Total Citation Counts(KCI+WOS) (11) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (10) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2023-10-01)

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