Comparison of Activated Carbons Produced from Zonguldak Kozlu and Zonguldak Karadon Hard Coals for Hydrogen Sorption

Oguz Erdogan F., Kopac T.

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS, ss.1-17, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1080/15567036.2020.1795310
  • Dergi Adı: ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, ABI/INFORM, Aerospace Database, Agricultural & Environmental Science Database, Applied Science & Technology Source, CAB Abstracts, Communication Abstracts, Compendex, Computer & Applied Sciences, Environment Index, Greenfile, INSPEC, Metadex, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.1-17
  • Anahtar Kelimeler: Hard coal, activation, heat treatment, activated carbon, hydrogen, adsorption, CHEMICAL ACTIVATION, DATE STONES, STORAGE CAPACITY, ADSORPTION, MICROWAVE, SURFACE, PYROLYSIS, BIOMASS, OPTIMIZATION, POROSITY
  • Kocaeli Üniversitesi Adresli: Evet

Özet

A series of activated carbons prepared using hard coals from two different mines, Kozlu and Karadon in Zonguldak, with heat treatment and chemical activation (KOH, NaOH, ZnCl,(2)and H3PO4) were evaluated for their hydrogen sorption performances at -196 degrees C. The analysis of the porous structure of the resulting activated carbons was accomplished through the use of the BET, Langmuir, DFT, and t-plot methods utilizing the nitrogen adsorption-desorption data (-196 degrees C). The analysis results have shown that the carbons, according to the type of the applied chemical activation could be ranked in the order H3PO4< ZnCl2< NaOH < KOH in terms of their yielded surface area and total pore volume. Heat treatment only without any chemical treatment yielded the smallest pore volume and surface area, on the other hand, highly microporous structure containing microporores in between 74.84% and 97.78% occured by chemical activation. The effects of pore volume and surface area on hydrogen sorption were examined. The highest hydrogen sorption capacity attained was 5.43 wt% and 5.21 wt% for the samples obtained from Zonguldak Karadon hard coal with KOH treatment at 700 degrees C, and with ZnCl(2)activation at 400 degrees C, respectively.