Activated carbon preparation with the addition of coke-making by-product—coke powder:Texture evolution and mechanism. (10th November 2019)

• Record Type: Journal Article
• Authors: Chen, Xiaojing; Guo, Yanxia; Cui, Jinglei; Zhang, Huirong; Cheng, Fangqin; Zou, Yan
• Is Part Of: Journal of cleaner production. Volume 237(2019)
• Publication Date: 2019-11-10
• Subjects: Metallurgical coke powder -- Activated carbon -- Pore structure -- Performance -- Pore development; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2019.117812
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: As a by-product of coke-making, the utilization of coke powder is a challenging issue for achieving sustainable development. This study describes the preparation of activated carbon (AC) with the addition of coke powder. The yield and performance of the prepared AC were evaluated, and the structure was also characterized by Brunauer-Emmett-Teller (BET), X-ray powder Diffraction (XRD), and Fourier Transform Infrared Spectrometry (FTIR). Results indicated that the addition of coke powder increased the yield and mechanical strength of AC, other than the unfavorable iodine adsorption. The 5% addition of coke powder was the ideal proportion with the yield and mechanical strength increase at 7.1% and 19%, and the iodine adsorption capacity decrease at 1.7%. The addition of coke powder increased the graphitization and decreased the surface area of AC with little effect on the types of the surface functional groups. The decreased surface area may be attributed to the dense crystalline carbon structure of coke powder, which has lower reactivity with water and prevents the carbon loss and pore development during the steam activation. This study provides an alternative solution for AC production by renewable utilization of coke powder. Graphical abstract: Image 1 Highlights: Addition of coke powder improves the yield and strength of activated carbon (AC). Adding coke powder primarily inhibits micropores formation. Coke powder increases the graphitization but affects little on functional group of AC. Coke powder acted as the skeleton of AC affects its pore development.