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用TPD、TPDE、BET以及SO_2动态吸附等方法,研究了4个活性炭样品。实验结果表明,活性炭的表面基团对SO_2的化学吸附起关键作用。这些表面基团分为酸性和碱性,其中碱性基团是SO_2化学吸附的活性中心,而物理吸附的SO_2仅与活性炭的物理性质有关。
Four activated carbon samples were studied by TPD, TPDE, BET and SO 2 dynamic adsorption. The experimental results show that the surface groups of activated carbon play a key role in SO 2 chemisorption. These surface groups are divided into acidic and basic, in which the basic group is the active center of SO 2 chemisorption, whereas the physically adsorbed SO 2 is only related to the physical properties of activated carbon.