用Ni(NO3)2改性活性炭，考察了改性前后活性炭对低浓度煤层气中甲烷的吸附性能；在单因素实验基础上，利用Box-Behnken中心组合设计实验，采用响应面方法优化的活性炭改性条件为：Ni(NO3)2浓度0.21 mol/L、活化温度730℃、活化时间67 min. 用该条件下改性的活性炭吸附甲烷，动态穿透时间为550 s，吸附量为58.07 mL/g，吸附性能优越.

The active carbon was modified by Ni(NO3)2 for adsorption methane which from the low concentration coal-bed gas. In order to optimization the conditions of nickel modified active carbon the Box-Behnken central composite design experiments which based on the univariate tests and response surface method were used. The result showed that the optimized conditions of nickel modified active carbon were Ni(NO3)2 concentration 0.21 mol/L, temperature 730℃, and time 67 min. Under the conditions, the breakthrough time was 550 s, adsorption capacity was 58.07 mL/g, the modified active carbon has superior adsorption performance.