Abstract: The γ-Al2O3 carrier with large pore diameter and appropriate pore size distribution was prepared by using carbon black as an enlarge agent. The effects of carbon black types，content and dispersion in the γ-Al2O3 power，such as the chemical properties and content of surfactant dispersant，on the pore distribution of γ-Al2O3 were studied. The results showed that dispersant agents，favoring the carbon black dispersion，could reduce the amount of carbon black and benefit the pore enlargement. By combining dispersant agents and sonication，the pore size distribution could be concentrated at 6nm and 10—20 nm（or 20—30 nm）with only 10% carbon black.

Key words: alumina, carbon black, pore-expanding, dual pore size distribution

摘要： 采用表面活性剂分散炭黑的方法对g-Al₂O₃进行扩孔，制备出孔径较大且孔分布集中的g-Al₂O₃载体。主要考察了炭黑类型、炭黑用量及炭黑分散性，如分散剂类型、用量、超声时间等对g-Al₂O₃孔径分布的影响。结果表明，传统的炭黑扩孔法存在用量大的缺点，采用分散剂结合超声处理的方法可在较低炭黑用量下（<10%）取得良好的扩孔效果，制备出孔径分布集中于6 nm和10～20 nm（或20～30 nm）的g-Al₂O₃载体。

关键词: 氧化铝, 炭黑, 扩孔, 双孔径分布