Preparation Activated Carbon from Scrap Tires by Microwave Assisted KOH Activation for Removal Emulsified Oil

Abstract

In this paper activated carbon adsorbents produced from waste tires by chemical activation methods and application of microwave assisted KOH activation. The influence of radiation time, radiation power, and impregnation ratio on the yield and oil removal which is one of the major environmental issues nowadays and considered persistent environmental contaminants and many of them are suspected of being carcinogenic. Based on Box-Wilson central composite design, polynomial models were developed to correlate the process variables to the two responses. From the analysis of variance the significant variables on each response were identified. Optimum conditions of 4 min radiation time, 700 W radiation power and 0.5 g/g impregnation ratio gave 205.8749 mg/g oil removal and 35.19618 % yield. The characteristics of the AC were examined by pore structure analysis, and scanning electron microscopy (SEM).The BET surface area and total pore volume were identified to be 374.594 m²/g and 0.2039 m³/g, respectively.

A review on Activated Carbon Prepared from Agricultural Waste using Conventional and Microwave Activation

“…The specification of the large surface area of the produced activated carbon that may be reaching 3000 m 2 /gm and the high degree of surface reactivity are the main reason to consider using activated carbon for liquid inorganic and organic or gaseous pollutants elemination [6][7][8][9][10]. Various materials and methods were used for activated carbon products such as chemical activation by impregnating the raw material with phosphoric acid, nitric acid, sulfuric acid, potassium hydroxide, sodium hydroxide, zinc chloride and physical activation with CO2 or steam followed by carbonization via conventional heating with temperature range from 400 to 800 °C [11,12] or carbonization via microwave heating [13][14][15]. In conventional heating, the heat generated at the surface of the treated material and gradually transferred to their interior parts that lead to caloric transport difficulties.…”