不同复合载体对MO基催化剂耐硫甲烷化性能的影响

来源 :中国化工学会2013年学术年会 | 被引量 : 0次 | 上传用户:woaiwodeqq
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  利用共沉淀法制备了ZrO2-Al2O3,CeO2-Al2O3,MgO-Al2O3,TiO2-Al2O3 四种不同的复合载体,然后采用浸渍法制备了负载量为25wt%的Mo基催化剂.采用X 射线衍射、N2 物理吸附、程序升温还原、程序升温脱附等技术考察了不同复合载体负载催化剂的微观结构和化学性质对CO甲烷化性能的影响.结果表明,25%MoO3/ZrO2-Al2O3 催化剂具有最好的耐硫甲烷化活性.25%MoO3/ZrO2-Al2O3催化剂活性组分与载体之间较强的相互作用减少了活性组分的迁移和烧结.同时,在ZrO2-Al2O3表面形成了更多的易被硫化活性Mo物种,硫化后形成了更多的甲烷化活性物种MoS2,有助于提高催化剂的CO甲烷化活性.
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