Production of Activated Carbon from Sifted Coke and Determination of Its Physicochemical Characteristics
Ordabaeva A.T. Muldakhmetov Z.M. Gazaliev A.M. Kim S.V. Shaikenova Z.S. Meiramov M.G.
August 2023Multidisciplinary Digital Publishing Institute (MDPI)
Molecules
2023#28Issue 15
The possibility of obtaining effective coal sorbents from a low-liquid product of coke chemical production—coke fines—has been studied. To obtain a coal sorbent, coke fines with a size of ≤10 mm were crushed and sieved to obtain a fraction of 2–5 mm. The resulting fraction was activated in a specially designed reactor at 850 °C with steam treatment. Activation was carried out at different durations of the process: 60, 90, and 120 min. It was found that the sample obtained with a process duration of 120 min has the best indicator for the ability to remove phenol from aqueous solutions (74.94 mg/g) and methylene blue (145 mg/g). When cleaning tap water with the resulting carbon sorbent, there is a decrease in the content of calcium, sulfates, and bicarbonate and a decrease in total mineralization. Obtained activated carbon was studied by scanning electron microscopy, low-temperature nitrogen adsorption (BET), and FTIR spectroscopy. It was found that the resulting activated carbon has a porous structure consisting of meso- and macropores, and the specific surface value was ~301 m2/g. The presence of high-intensity absorption bands corresponding to acid functional groups has also been established.
activation , carbon sorbent , coke fines , methylene blue , phenol
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Institute of Organic Synthesis and Chemistry of Coal of Kazakhstan Republic, Alikhanov Str., 1, Karaganda, 100012, Kazakhstan
Institute of Organic Synthesis and Chemistry of Coal of Kazakhstan Republic
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