Abstract:

Ni/Al₂O₃ catalysts were prepared by adjusting the acidity of supports and the addition of promoter or chelating agent during the loading process. The catalysts were characterized by XRD and TPR and the catalytic performance for the first stage hydrogenation of pyrolysis gasoline was evaluated. Results showed that the dispersion of active component can be increased by enhancing the acidity of support and the addition of promoter or chelating agent，so that the hydrogenation activity，stability and selectivity of catalyst was increased.

摘要：

通过调整载体酸性、在活性组分负载过程中添加助剂、络合剂等方法制备Ni/Al₂O₃催化剂。采用XRD、TPR等技术表征了催化剂活性组分的分散度和还原度，并进行了催化剂性能的评价。结果表明通过调整载体酸性、添加助剂、络合剂的方式可以实现对催化剂中活性组分分散度的调变，提高催化剂加氢活性、稳定性及选择性能。