In the present study, we examined the production method of the carbonaceous adsorbent, in which acrylonitrile and methyl acrylate copolymers were used as raw materials, and phosphate and zinc chloride were added as carbonization and activation accelerating agents. The raw materials were treated in air for 7hr at temperatures between 120-220°C.
Three parts of 50% aqueous solution of phosphate or zinc chloride were added to 1 part of each char (PANACHP, PANACHZ), and the solution was then directly placed in a reaction oven at 600-900°C. The weight reduction rate W/Wo (-) decreased linearly with increased activation time. Both the methylene blue adsorbability (MB) and the internal surface area (S) of the activated material showed a maximum value and then decreased with increased activation time. MB and S of PANACHP and PANACHZ showed the maximum value in conditions with activation temperature of 900°C and activation time of 180min. In these conditions, the following results were obtained: MB: 450mg/g and S: 1, 280m2/g for PANACHP and MB: 310mg/g, S: 1, 080m2/g for PANACHZ, indicating that both PANACHP and PANACHZ were carbonaceous adsorbents which possessed more than twice as much mercaptan gas adsorbability as the activated carbon on the market.
