活性炭模块的制备及其对苯的吸附性能研究

Preparation of an activated carbon monolith and its dynamic adsorption of benzene

以胶黏剂和颗粒活性炭为原料,制备了活性炭模块并测试了该模块的床层阻力、强度及对苯蒸气的动态吸附性能,考察了胶黏剂添加量和添加增稠剂对上述性能的影响。结果表明该活性炭模块的优化制备条件为热处理温度95℃,热处理时间5 h,胶黏剂添加量10%以及充分冲洗掉增稠剂。在该制备条件下,模块成型的活性炭对苯蒸气的动态饱和吸附量可达106.39mg/cm3,吸附速率为920.43min-1,与成型前相比吸附性能下降小于10%;床层阻力小于颗粒装填床层,抗压强度大于0.12 MPa/cm2。

Activated carbon monoliths have been prepared using granular activated carbon and adhesives. The air resistance, compressive strength and dynamic adsorptive capacity for benzene vapor of the activated carbon monolith were tested. Moreover, the effects of the adhesive content and added thickener on the dynamic adsorptive capacity were investigated. The optimum conditions to obtain highest dynamic adsorptive capacity of 106.39 mg/cm3 and highest adsorption rate for benzene vapor of 920.43 min -~ were found to be： a heat treatment temperature of 95~C , a heat treatment time of 5 h, an adhesive content of 10% and complete removal of the thickener. Compared to the raw granular activated carbon, the adsorptive capacity of the activated carbon monolith decreased less than 10% ; the air resistance was less than that of the granular activated carbon, and the compressive strength was greater than O. 12 MPa/cm2