Ni-W/HY-SBA-15催化剂的加氢脱芳烃性能研究

STUDY ON THE HYDRODEAROMATIZATION PERFORMANCE OF Ni-W/HY-SBA-15 CATALYST

采用后合成法合成不同HY含量的HY-SBA-15复合分子筛,并以其为载体,担载Ni-W双金属活性组分制备加氢脱芳烃催化剂。用XRD对制备的HY-SBA-15复合分子筛进行表征。结果表明,所合成HY-SBA-15复合分子筛不仅具有SBA-15的介孔结构,而且具有Y沸石的微孔结构。以萘质量分数为10%的正十二烷溶液为模型化合物评价催化剂的加氢脱芳烃反应活性。结果表明,载体中HY分子筛含量(质量分数)为10%时,NiW/HY-SBA-15催化剂具有最佳的脱芳烃性能,催化脱芳烃反应的最佳工艺条件为:反应温度320℃,反应压力6.0MPa,空速2.0h-1,氢油体积比600。在此条件下,模型化合物的芳烃饱和率达到95.1%。

A series of HY-SBA-15 composite molecular sieves with various HY contents were synthesized by post-synthesis method and were used as supports to prepare NiW/HY-SBA-15 catalysts for hydrodearomatization（HDA）. The catalyst was characterized by XRD and the results showed that both mesoporous SBA-15 structure and microporous zeolite Y structure existed in the HY-SBA-15 composite. The HDA performance of the catalyst was evaluated using dodecane containing 10% naphthalene as model feed. The evaluation results showed that catalyst with composite support having 10% HY exhibited the best HDA performance. Under the optimal conditions of a reaction temperature of 320 ℃, a reaction pressure of 6.0 MPa, a WHSV of 2.0 h^-1 and a hydrogen/oil ratio of 600, using NiW/HY-SBA-15（10） catalyst the aromatics saturation rate reached 95.1%.