Adsorbents were produced from bituminous coal using chemical reagents such as KOH, NaOH, and LiOH. The effects of hydroxides on the structure of the adsorbents were established by means of iodine number analysis, BET surface analysis, thermogravimetric analysis (TGA), and Fourier Transform Infrared spectrum (FT-IR) analysis. It has been established that the BET surface area and iodine number values of the adsorbents are in the order of KOH > NaOH > LiOH.