采用ＸＲＤ、ＤＴＡ、ＴＧ和比表面及孔径分布测定等方法，对文题进行了研究，催化剂表面上结炭污染是造成催化剂活性下降的主要原因。采用空气－水蒸气烧炭法，在第一阶段，水量为０．５ｋｇ／ｋｇｃａｔ·ｈ，空气量１８０Ｌ／ｋｇｃａｔ·ｈ，热点温度４５０℃；第二阶段，空气量２４０Ｌ／ｋｇｃａｔ·ｈ，水量逐渐减少到零，热点温度５００℃的条件下对失活催化剂进行再生，处理后的催化剂性能基本恢复。 XRD, DTA, TG and determination of specific surface area and pore size distribution were used to study the topic. Carbon contamination on the catalyst surface was the main reason for the decrease of catalyst activity. In the first stage, the amount of water was 0.5kg / kgcat · h, the air volume was 180L / kgcat · h and the hot spot temperature was 450 ℃. In the second stage, the air volume was 240L / kgcat · h, the amount of water Gradually reduced to zero, the hot temperature of 500 ℃ under the conditions of the catalyst for the regeneration of the deactivated, the treated catalyst performance basically restored.