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以介孔分子筛SBA-15为载体,采用浸渍法制备了Co-Mo/SBA-15催化剂。采用XRD、BET、FT-IR、TEM等测试手段对样品进行了分析。用0.5%二苯并噻吩(DBT)的环己烷溶液为模型化合物,在固定床反应器上评价了Co-Mo/SBA-15的催化活性。结果表明,担载金属后的SBA-15分子筛仍然具有高度有序的二维六方介孔结构,金属颗粒高度分散。当MoO3的负载量增加到25%时,分散度有所降低,部分MoO3以聚集态存在于载体表面。含5%CoO和25%MoO3的Co-Mo/SBA-15催化剂具有最高的加氢脱硫活性,硫质量分数由490μg/g降至11μg/g,DBT的脱硫率可达97.75%。
The mesoporous molecular sieve SBA-15 was used as support to prepare Co-Mo / SBA-15 catalyst by impregnation method. The samples were analyzed by XRD, BET, FT-IR and TEM. The catalytic activity of Co-Mo / SBA-15 was evaluated on a fixed bed reactor using 0.5% dibenzothiophene (DBT) in cyclohexane as a model compound. The results show that the metal-supported SBA-15 zeolite still has a highly ordered two-dimensional hexagonal mesoporous structure, and the metal particles are highly dispersed. When the loading of MoO3 increased to 25%, the dispersion degree decreased, and some MoO3 existed in aggregated state on the carrier surface. The Co-Mo / SBA-15 catalyst containing 5% CoO and 25% MoO3 had the highest hydrodesulfurization activity. The sulfur content decreased from 490μg / g to 11μg / g and the desulfurization rate of DBT reached 97.75%.