不同催化剂对磷酸法制备颗粒活性炭的影响

以杉木屑为原料,在磷酸法颗粒活性炭捏合成型过程中,添加不同催化剂,选择不同的浸渍量,制备中微孔均较发达的木质颗粒活性炭。探讨工艺条件对颗粒活性炭碘吸附值、亚甲蓝吸附值及官能团的影响。结果表明:催化剂有助于提高活性炭的吸附性能,而且提高催化剂的量,有利于颗粒活性炭中孔和大孔的发展。因此选择不同的催化剂量,可以灵活调整活性炭微孔、中孔和大孔的比例,实现活性炭孔隙的调变;另一方面添加催化剂可以降低活化温度实现节能减排。

Effect of different catalysts on the preparation of granular activated carbon with phosphoric acid

Meso-and micropores granular activated carbon （GAC） has been prepared from sawdust in the kneading molding process of GAC with phosphoric acid activation by adding different catalysts and impregnation volume. The effects of technologi- cal conditions on iodine adsorption, methylene blue value and functional groups of the prepared GAC were studied. The results showed that catalysts can improve the adsorption performance of GAC, and the meso- and macropores of the obtained GAC have greater increase with the addition of catalysts. Therefore, the proportion of micro-, meso- and macropores in GAC can be flexibly adjusted by choosing different types of catalysts. Besides, the activation temperature can be decreased to achieve the goal of ener gy-saving and emission reduction.