วารสารวิชาการและวิจัย มทร.พระนคร, ปีที่ 15, ฉบับที่ 1 (ม.ค.-มิ.ย. 2564), หน้า 167-178This research aims to produce activated carbon from molasses via a chemical activation
process with potassium hydroxide (KOH) and a microwave heating process, which consumes less
energy and provides more rapid and uniform heat distribution than a conventional heating. The
obtained activated carbon was then characterized with BET, SEM and FTIR. It exhibited a large
specific surface area of 1,631 m2/g, and a total pore volume of 1.124 cm3/g consisting of mesopore and micropore. In addition, the active functional groups were also found on the surface of the activated carbon. Thus, it was brought for the adsorption test with methylene blue. It was found that the adsorption capacity of the activated carbon increased with time and reached the
equilibrium within 8 hours. The adsorption data of the activated carbon were corresponded to
Langmuir isotherm with the highest adsorption capacity of 370.37 mg/g. The adsorption kinetic of
the activated carbon exhibited pseudo-second order reaction suggesting to the chemisorption
phenomenon. From the thermodynamic study, it revealed that the adsorption process were
endothermic and spontaneous reactions.Rajamangala University of Technology Phra Nakho
