Enhanced uptake capacities and isosteric heats of CO2 and CH4 adsorption on spent coffee ground activated carbons loaded with metal ions
Yükleniyor...
Dosyalar
Tarih
2019
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
SCIENTIFIC TECHNICAL RESEARCH COUNCIL TURKEY-TUBITAK
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Low-cost activated carbon (AC) samples obtained from waste coffee grounds were used for CO2 and CH4 adsorption. ACs were prepared by chemical activation and carbonized at three different temperatures. AC carbonized at 800 degrees C showed a relatively high surface area (582.92 m(2) g(-1)) and high adsorption capacities of 2.6 mmol g(-1) and 1.1 mmol g(-1) at 25 degrees C for CO2 and CH4, respectively. Adsorbent samples were prepared by loading of Fe3+ metal ions onto ACs and their adsorption capacities were compared with those of nonloaded ACs. As expected, the loading of Fe3+ metal ions increased the adsorption capacities at all temperatures and the adsorption capacity of Fe3+-loaded AC carbonized at 800 degrees C was 3.1 mmol g(-1) for CO2 and 1.2 mmol g(-1) for CH4 at 25 degrees C. The isosteric heats of adsorption were calculated at 0-35 degrees C with the range of 20-35 kJ mol(-1) and 18-23 kJ mol(-1) for CO2 and CH4, respectively. According to our findings, bio-based ACs can be used as an effective and alternative adsorbent for capturing different gas molecules.
Açıklama
Anahtar Kelimeler
Bio-based activated carbon, CO2 adsorption, CH4 adsorption, isosteric heat
Kaynak
TURKISH JOURNAL OF CHEMISTRY
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
43
Sayı
3
Künye
Kırbıyık, C., Büyükbekar, B. Z., Kuş, M., Ersöz, M. (2019). Enhanced Uptake Capacities and Isosteric Heats of CO2 and CH4 Adsorption on Spent Coffee Ground Activated Carbons Loaded with Metal Ions. Turkish Journal of Chemistry, 43(3), 948-962.
