Enhanced CO2 Sorption on Ordered Mesoporous Carbon CMK-3 in the Presence of Water

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• 作者：Jia Zhou ; Wei Su ; Yan Sun ; Shuguang Deng ; Xiaojing Wang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2016
• 出版时间：March 10, 2016
• 年：2016
• 卷：61
• 期：3
• 页码：1348-1352
• 全文大小：324K
• ISSN：1520-5134

文摘

Mesoporous carbon CMK-3 was synthesized via a hard template method. The structures of the pores were characterized by N₂ adsorption at 77K, XRD, and TEM examinations. The BET surface area and total pore volume were 1115 m²/g and 1.11 cm³/g, respectively. Adsorption isotherms of carbon dioxide on the CMK-3 in the presence of water were collected. At 275 K and 3.6 MPa, the CO₂ sorption capacity was 42 mmol/g with a water to dry carbon weight ratio (R_w) of 2.35. This is 2.26 times as high as that for the dry CMK-3 sample and 23% higher than the highest CO₂ sorption previously obtained on activated carbon with preadsorbed water. The enthalpy change obtained from the sorption isotherms was −55.6 kJ/mol, which is lower than the enthalpy for the formation of CO₂ hydrate in pure water.