Activated carbon–methanol is one of working pairs most commonly used in adsorption systems because of their large cyclic adsorption capacity, low desorption temperature, low adsorption heat and high evaporating latent heat of methanol. The COP (coefficient of performance) is the largest when activated carbon pairs with methanol [7,8]. Compared to original activated carbon–methanol, the activated carbon fiber–methanol increases the COP by 10–20% and the cyclic adsorption capacity by 2–3 times [9]. The activated carbon–methanol would be one of most promising working pairs in the practical systems [10–13]. Certainly, the activated carbon–methanol has many shortcomings. Firstly, the activated carbon would catalyze methanol to decompose into dimethyl ether especially at the temperature of more than 150 8C. Therefore, the activated carbon–methanol is suitable for the desorption temperature no more than 120 8C. Secondly, methanol should be used carefully due to its high toxicity. Thirdly, high vacuum is necessary for this system. Any non-condensable gas will cause great decrease of the system performance. And the slow pyrogenation of methanol is inevitable in activated carbon–methanol systems [13]. Finally, the thermal conductivity of activated carbon is poor and is near to the insulation material.