Ｎｉ／Ａｌ_２Ｏ_３催化剂上甲烷部分氧化制合成气反应是在固定床流动反应装置上进行的。考察了催化剂的床层温度、反应压力、空速和原料气配比对催化剂积炭产生的影响。实验结果表明，积炭速率随催化剂床层温度的升高而降低，当温度低于７０℃时，积炭速率骤增：积炭总是发生在催化剂床层的下段；若空速超过３．０×１０~５ｈ~（－１），积炭速率随空速增加而明显降低。从ＦＴＩＲ实验结果可知，吸附在Ｎｉ／Ａｌ_２Ｏ_３催化剂表面上的ＣＯ，一部分歧化生成了ＣＯ_２和Ｃ。综上所述，催化剂表面积炭主要来源于以下两个反应： ２ＣＯ→Ｃ＋ＣＯ_２，ＣＯ＋Ｈ_２　＝ Ｃ＋Ｈ_２Ｏ Partial oxidation of methane to synthesis gas over Ni / Al 2 O 3 catalyst was carried out on a fixed-bed flow reactor. The effects of catalyst bed temperature, reaction pressure, space velocity and feed gas ratio on the coke deposition were investigated. The experimental results show that the carbon deposition rate decreases with the increase of the catalyst bed temperature. When the temperature is lower than 70 ℃, the carbon deposition rate increases sharply: the carbon deposition always occurs in the lower part of the catalyst bed; 0 × 10 ~ 5h ~ (-1), the carbon deposition rate decreases with the increase of space velocity. From the FTIR experimental results, we can see that a part of CO that is adsorbed on the surface of Ni / Al 2 O 3 catalyst disproportionally produces CO_2 and C. In summary, the catalyst surface carbon deposition mainly from the following two reactions: 2CO → C + CO_2, CO + H_2 = C + H_2O