Preparation of high-surface area activated carbons from Paulownia wood by ZnCl2 activation

YORGUN S., Vural N., DEMİRAL H.

MICROPOROUS AND MESOPOROUS MATERIALS, cilt.122, ss.189-194, 2009 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 122
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1016/j.micromeso.2009.02.032
  • Dergi Adı: MICROPOROUS AND MESOPOROUS MATERIALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.189-194
  • Anahtar Kelimeler: Paulownia wood, Activated carbon, Chemical activation, Textural characterization, ZINC-CHLORIDE ACTIVATION, CHEMICAL ACTIVATION, PHYSICAL ACTIVATION, ADSORPTION CHARACTERISTICS, APRICOT STONES, CHERRY STONES, FIR WOOD, WASTE, WATER, POROSITY
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

In this study, an activated carbon with high-surface area was prepared from Paulownia (P. tomentose) wood by chemical activation with ZnCl2. The influences of carbonization temperature and impregnation ratio on the pore structure of the activated carbon were investigated. Activation temperatures and impregnation ratios were selected in the range of 400-700 degrees C and 0.5-4.0, respectively. Under the experimental conditions investigated, a carbonization temperature of 400 degrees C and impregnation ratio of 4.0 were found to be suitable for producing high-surface area activated carbon. It was shown that ZnCl2 works effectively as dehydration reagent below 500 degrees C. The obtained carbons were characterized by nitrogen adsorption-desorption isotherms at 77 K. The results showed that the surface area and micropore volume of activated carbons, which were determined by application of the Brunauer-Emmett-Teller (BET) and t-plot methods, were achieved as high as 2736 m(2)/g and 0.69 cm(3)/g, respectively. The chemically activated carbons were found to be mainly type I carbons. The microstructures of the char and activated carbons were also examined with scanning electron microscopy (SEM). (C) 2009 Elsevier Inc. All rights reserved.