DINGXINDA: Activated carbon preparation with the addition of coke-making by-product—coke powder:Texture evolution and mechanism

DINGXINDA

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 wan yang activated carbonactivated 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.  activated carbon pellets for air filterThis study provides an alternative solution for AC production by renewable utilization of coke powder.