Interconnected Micro, Meso, and Macro Porous Activated Carbon from Bacterial Nanocellulose for Superior Adsorption Properties and Effective Catalytic Performance

Molecules

Arnon Khamkeaw¹  Muenduen Phisalaphong¹  Tianpichet Perngyai¹  Bunjerd Jongsomjit¹  Tatdanai Asavamongkolkul¹ 

[1] Bio-Circular-Green-economy Technology & Engineering Center, BCGeTEC, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand;

关键词: activated carbon;    bacterial cellulose;    catalyst;    ethanol dehydration;    adsorption;   

DOI  :  10.3390/molecules25184063

来源: DOAJ

【 摘 要 】

The porous carbon (bacterial cellulose (BC)-activated carbon (AC)(BA)) prepared via two-step activation of bacterial nanocellulose by treatments with potassium hydroxide (KOH) and then phosphoric acid (H₃PO₄) solutions showed superior adsorption properties and effective performance as catalyst support. BC-AC(BA) had an open and interconnected multi-porous structure, consisting of micropores (0.23 cm³/g), mesopores (0.26 cm³/g), and macropores (4.40 cm³/g). The BET surface area and porosity were 833 m²/g and 91.2%, respectively. The methylene blue adsorption test demonstrated that BC-AC(BA) was superior in its mass transfer rate and adsorption capacities. Moreover, BC-AC(BA) modified by H₃PO₄ treatment showed a significant enhancement of catalytic performance for dehydration of ethanol. At the reaction temperature of 250–400 °C, 30P/BC-AC(BA) gave ethanol conversion at 88.4–100%, with ethylene selectivity of 82.6–100%, whereas, high selectivity for diethyl ether (DEE) at 75.2%, at ethanol conversion of 60.1%, was obtained at the reaction temperature of 200 °C.

【 授权许可】

Unknown