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Title: Enhanced uptake capacities and isosteric heats of CO2 and CH4 adsorption on spent coffee ground activated carbons loaded with metal ions
Authors: Kırbıyık, Çisem
Büyükbekar, Burak Zafer
Kuş, Mahmut
Ersöz, Mustafa
Keywords: Kimya, Analitik
Kimya, Uygulamalı
Kimya, İnorganik ve Nükleer
Kimya, Tıbbi
Kimya, Organik
Mühendislik, Kimya
Issue Date: 2019
Abstract: 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 ? C showed a relatively high surface area (582.92 m2 g ?1 ) and high adsorption capacities of 2.6 mmol g ?1 and 1.1 mmol g ?1 at 25 ? C for CO2 and CH4 , respectively. Adsorbent samples were prepared by loading of Fe 3+ metal ions onto ACs and their adsorption capacities were compared with those of nonloaded ACs. As expected, the loading of Fe 3+ metal ions increased the adsorption capacities at all temperatures and the adsorption capacity of Fe 3+ -loaded AC carbonized at 800 ? C was 3.1 mmol g ?1 for CO2 and 1.2 mmol g ?1 for CH4 at 25 ? C. The isosteric heats of adsorption were calculated at 0–35 ? 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.
ISSN: 1300-0527
Appears in Collections:Mühendislik ve Doğa Bilimleri Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collections
TR Dizin İndeksli Yayınlar Koleksiyonu / TR Dizin Indexed Publications Collections
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collections

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