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OALib Journal期刊
ISSN: 2333-9721
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sio2的甲硅烷基化对钴基催化剂费-托合成催化性能的影响
, PP. 737-742
Keywords: 钴,二氧化硅,甲硅烷基化,疏水,费-托合成
Abstract:
？利用甲硅烷基化作用制得了不同疏水程度的sio2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ft-ir、29sicpmasnmr、bet、xrd、raman、xps和h2-tpr等表征手段,考察了sio2甲硅烷基化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=240℃、n(h2)/n(co)=2和ghsv=1000h-1的条件下进行评价。结果表明,随sio2疏水程度的增加,钴催化剂的co3o4晶粒长大且晶型趋于完整,钴硅相互作用减弱,还原度增加,催化剂的活性增强。
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