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OALib Journal期刊
ISSN: 2333-9721
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sba-15的疏水改性及其对钴基催化剂费-托合成催化性能的影响
, PP. 455-460
Keywords: 钴催化剂,sba-15,疏水改性,费-托合成
Abstract:
？利用甲硅烷基化作用制得了不同疏水基团（甲基、二甲基和三甲基）改性sba-15载体，采用等体积浸渍法制备了质量分数为5%的一系列负载型钴催化剂。结合bet、ft-ir、29sicpmasnmr、xrd和h2-tpr等表征手段，考察了sba-15疏水改性对钴基催化剂物相结构、还原行为以及费-托合成催化性能的影响。催化剂在固定床反应器中在p=2.0mpa，t=200~250℃，h2和co体积比为2和ghsv=1000h-1的条件下进行评价。结果表明，相对于未改性sba-15负载钴催化剂，疏水基团改性sba-15负载钴催化剂的还原度增加，co转化率提高；co3o4晶粒粒径增大，难还原钴物种减少，ch4选择性降低，c5+烃选择性增加。
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