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http://dx.doi.org/10.14478/ace.2015.1011

SO2 Adsorption Characteristics by Cellulose-Based Lyocell Activated Carbon Fiber on Cu Additive Effects  

Kim, Eun Ae (C-Industry Incubation Center, Korea Research Institute of Chemical Technology (KRICT))
Bai, Byong Chol (C-Industry Incubation Center, Korea Research Institute of Chemical Technology (KRICT))
Lee, Chul Wee (C-Industry Incubation Center, Korea Research Institute of Chemical Technology (KRICT))
Lee, Young-Seak (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Im, Ji Sun (C-Industry Incubation Center, Korea Research Institute of Chemical Technology (KRICT))
Publication Information
Applied Chemistry for Engineering / v.26, no.4, 2015 , pp. 394-399 More about this Journal
Abstract
In this study, the Cu catalyst decorated with activated carbon fibers were prepared for improving $SO_2$ adsorption properties. Flame retardant and heat treatments of Lyocell fibers were carried out to obtain carbon fibers with high yield. The prepared carbon fibers were activated by KOH solution for the high specific surface area and controlled pore size to improve $SO_2$ adsorption properties. Copper nitrate was also used to introduce the Cu catalyst on the activated carbon fibers (ACFs), which can induce various reactions in the process; i) copper nitrate promotes the decomposition reaction of oxygen group on the carbon fiber and ii) oxygen radical is generated by the decomposition of copper oxide and nitrates to promote the activation reaction of carbon fibers. As a result, the micro and meso pores were formed and Cu catalysts evenly distributed on ACFs. By Cu-impregnation process, both the specific surface area and micropore volume of carbon fibers increased over 10% compared to those of ACFs only. Also, this resulted in an increase in $SO_2$ adsorption capacity over 149% than that of using the raw ACF. The improvement in $SO_2$ adsorption properties may be originated from the synergy effect of two properties; (i) the physical adsorption from micro, meso and specific surface area due to the transition metal catalyst effect appeared during Cu-impregnation process and ii) the chemical adsorption of $SO_2$ gas promoted by the Cu catalyst on ACFs.
Keywords
lyocell; activated carbon fiber; impregnation; transition metal; $SO_2$;
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Times Cited By KSCI : 8  (Citation Analysis)
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