氨水活化的活性炭纤维的脱硫作用

Desulfurization of active carbon fibers activated with ammonia water

通过使用氨水作活化剂对沥青基炭纤维进行活化 ,制得了表面富含氮元素的活性炭纤维 .元素分析和XPS均证实此种活化方法可在活性炭纤维上引入含氮官能团 .所得活性炭纤维在H2 O和O2 存在下脱除模拟烟气中SO2 的活性显著高于用常规方法活化 (如水蒸汽 )制得的活性炭纤维 ,也高于含氮的聚丙烯腈基活性炭纤维 .

Carbon fibers from ethylene tar pitch were converted to nitrogen containing active carbon fibers (ACFs) by ammonia water activation instead of steam activation. The introduction of nitrogen containing functional groups in ACFs was indentified by elemental analysis and XPS. The activity of ACFs from ammonia water activation for SO\-2 removal in the presence of O\-2 and H\-2O is markedly higher than that of ACFs from steam activation, and is also higher than that of PAN ACF .The type and function of nitrogen containing groups during desulfurization were discussed in detail.