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OALib Journal期刊
ISSN: 2333-9721
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粘结剂对颗粒活性炭psa分离ch4/n2性能的影响
Keywords: 无机非金属材料,颗粒活性炭,变压吸附,ch4/n2,孔结构
Abstract:
？以褐煤为原料,分别采用煤焦油、可溶淀粉和聚丙烯酰胺(pam)作粘结剂,制备了用于变压吸附(psa)分离ch4和n2混合气体(ch4/n2)的三种颗粒活性炭gac--c、gac--t和gac--p,对样品的表面官能团和孔结构进行表征,研究了粘结剂对活性炭psa分离ch4/n2性能的影响。结果表明:粘结剂的种类和用量对样品分离效果影响较大,gac--t的psa分离ch4/n$_{2}$的性能最好。粘结剂用量(粘结剂与煤粉的质量比)为0.15--0.20时,gac--t可将ch4浓缩28\%左右;gac--c、gac--t和gac--p表面含氧官能团含量的关系排序为gac--t>gac--c>gac--p,而三者的孔结构范围则为10--30nm、2--10nm和0.4--2nm,相差较大;样品碱性表面含氧官能团的含量越高越有利于ch4/n2的psa分离;ch4/n$_{2}$分离效果受微孔的影响较大,0.4--0.7nm的微孔是造成gac--c、gac--t和gac--p分离效果差异的主要因素。
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