Carbon Dioxide Adsorption Using High Surface Area Activated Carbons from Local Coals Modified by KOH, NaOH and ZnCl2 Agents

Activated carbons of various features were produced by the impregnation of local coal samples that were taken from Kilimli region of Zonguldak (Turkey) with chemical agents KOH, NaOH and ZnCl2 at different temperatures (600-800°C) and concentrations (1:1-6:1 agent:coal), for their evaluation in CO2 adsorption studies. BET, DR, t-plot and DFT methods were used for the characterization of carbon samples based on N2 adsorption data obtained at 77K. The pore sizes of activated carbons produced were generally observed to be in between 13-25Å, containing highly micropores. Mesopore formations were higher in samples treated with ZnCl2. The highest value for the BET surface area was found as 2,599m2 g-1 for the samples treated with KOH at 800°C with a KOH to coal ratio of 4:1. It was observed that the CO2 adsorption capacities obtained at atmospheric pressure and 273K were considerably affected by the micropore volume and surface area. The highest CO2 adsorption capacities were found as 9.09mmol/g (28.57% wt) and 8.25mmol g-1 (26.65% wt) for the samples obtained with KOH and NaOH treatments, respectively, at ratio of 4:1. The activated carbons produced were ordered as KOH>NaOH>ZnCl2, according to their surface areas, micropore volumes and CO2 adsorption capacities. The low-cost experimental methods developed by the utilization of local coals in this study enabled an effective capture of CO2 before its emission to atmosphere. © 2017 Walter de Gruyter GmbH, Berlin/Boston 2017.

Dergi Adı International Journal of Chemical Reactor Engineering
Dergi Cilt Bilgisi 15
Dergi Sayısı 3
Sayfalar -
Yayın Yılı 2017
Eser Adı
[dc.title]
Carbon Dioxide Adsorption Using High Surface Area Activated Carbons from Local Coals Modified by KOH, NaOH and ZnCl2 Agents
Yazar
[dc.contributor.author]
Toprak A.
Yazar
[dc.contributor.author]
Kopac T.
Yayın Yılı
[dc.date.issued]
2017
Yayıncı
[dc.publisher]
Walter de Gruyter GmbH
Yayın Türü
[dc.type]
article
Özet
[dc.description.abstract]
Activated carbons of various features were produced by the impregnation of local coal samples that were taken from Kilimli region of Zonguldak (Turkey) with chemical agents KOH, NaOH and ZnCl2 at different temperatures (600-800°C) and concentrations (1:1-6:1 agent:coal), for their evaluation in CO2 adsorption studies. BET, DR, t-plot and DFT methods were used for the characterization of carbon samples based on N2 adsorption data obtained at 77K. The pore sizes of activated carbons produced were generally observed to be in between 13-25Å, containing highly micropores. Mesopore formations were higher in samples treated with ZnCl2. The highest value for the BET surface area was found as 2,599m2 g-1 for the samples treated with KOH at 800°C with a KOH to coal ratio of 4:1. It was observed that the CO2 adsorption capacities obtained at atmospheric pressure and 273K were considerably affected by the micropore volume and surface area. The highest CO2 adsorption capacities were found as 9.09mmol/g (28.57% wt) and 8.25mmol g-1 (26.65% wt) for the samples obtained with KOH and NaOH treatments, respectively, at ratio of 4:1. The activated carbons produced were ordered as KOH>NaOH>ZnCl2, according to their surface areas, micropore volumes and CO2 adsorption capacities. The low-cost experimental methods developed by the utilization of local coals in this study enabled an effective capture of CO2 before its emission to atmosphere. © 2017 Walter de Gruyter GmbH, Berlin/Boston 2017.
Kayıt Giriş Tarihi
[dc.date.accessioned]
2019-12-23
Açık Erişim Tarihi
[dc.date.available]
2019-12-23
Yayın Dili
[dc.language.iso]
eng
Konu Başlıkları
[dc.subject]
activated carbon
Konu Başlıkları
[dc.subject]
chemical activation
Konu Başlıkları
[dc.subject]
CO2 adsorption
Konu Başlıkları
[dc.subject]
coal
Haklar
[dc.rights]
info:eu-repo/semantics/closedAccess
ISSN
[dc.identifier.issn]
1542-6580
Dergi Adı
[dc.relation.journal]
International Journal of Chemical Reactor Engineering
Dergi Sayısı
[dc.identifier.issue]
3
Dergi Cilt Bilgisi
[dc.identifier.volume]
15
Tek Biçim Adres
[dc.identifier.uri]
https://dx.doi.org/10.1515/ijcre-2016-0042
Tek Biçim Adres
[dc.identifier.uri]
https://hdl.handle.net/20.500.12628/4577
Görüntülenme Sayısı ( Şehir )
Görüntülenme Sayısı ( Ülke )
Görüntülenme Sayısı ( Zaman Dağılımı )
Görüntülenme
7
09.12.2022 tarihinden bu yana
İndirme
1
09.12.2022 tarihinden bu yana
Son Erişim Tarihi
05 Şubat 2024 17:25
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samples adsorption produced carbons obtained capacities surface methods observed activated micropore highest treated considerably 09mmol/g volume pressure atmospheric 25mmol affected Activated enabled Berlin/Boston Gruyter Walter atmosphere emission before capture effective utilization developed low-cost volumes according
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