磷酸活化草浆黑液木质素制备活性炭的研究  

Preparation of Activated Carbon from Straw Black Liquor Lignin Impregnated by Phosphoric Acid

作　　者：闫伟[1] 张艳[1] 杨建华[1] 鲁金明[1] 王金渠[1] 

机构地区：[1]大连理工大学化工与环境生命学部化工学院,辽宁大连116024

出　　处：《林产化学与工业》2011年第5期81-84,共4页Chemistry and Industry of Forest Products

摘　　要：用磷酸活化草浆造纸黑液木质素制备活性炭。探讨了磷酸在木质素活化过程中的作用,研究了磷料比、活化温度、活化时间对所制活性炭的比表面积和对正丁烷吸附量的影响。结果表明,草浆造纸黑液木质素是一种优良的制备活性炭的原料,磷酸不仅是脱水剂,而且还是活化过程的保护剂。活性炭制备条件为:磷料比值2.5,活化温度450℃,活化时间60～70 min,制得活性炭的BET比表面积达1 772 m2/g,吸附等温线介于I型和II型之间,正丁烷吸附量为485 mg/g。Activated carbon was prepared from straw black liquor lignin using phosphoric acid as activation agent.The function of phosphoric acid in activation process was discussed,and effects of reaction conditions such as ratio of activation reagent to material,the temperature and the activation time were investigated.The results showed that the lignin of straw black liquor was a good material for preparing activated carbon.Phosphoric acid acts as both the dehydrating agent and the protective agent during the activation process.The optimum conditions are as follows：activation reagent to material ratio 2.5,activation temperature 450 ℃,and activation time 60-70 min.Under these conditions,the BET surface of the carbon is up to 1 772 m2/g,and the adsorption isotherm is between the type I and type II with adsorption capacity of n-butane 485 mg/g.

关 键 词：黑液 草浆木质素 磷酸 活性炭 

分 类 号：TQ35[化学工程] TQ424