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我国有丰富的半焦资源,这些半焦如果不能对其有效利用会严重污染环境。半焦未热解完全,有极发达的微孔结构,具有一定的吸附性能,但未改性半焦的吸附能力不及普通活性炭,因此半焦在用于吸附剂之前均需进行活化以提高其吸附性能,常用活化方法主要为物理活化及化学活化法。综述了半焦的孔隙结构及其活化机理,介绍了近些年半焦在水蒸气活化、氧气活化、碱活化及硝酸活化等方面的应用研究进展,并提出了半焦改性技术的研究发展方向。
China has a wealth of semi-coke resources, if these semi-coke can not effectively use it will seriously pollute the environment. Semi-coke is not pyrolyzed completely, has a very developed microporous structure, has a certain adsorption properties, but the adsorption capacity of unmodified semi-coke less than normal activated carbon, so semi-coke before being used in the adsorbent to be activated to improve its Adsorption properties, commonly used activation methods are mainly physical activation and chemical activation method. In this paper, the pore structure and activation mechanism of semi-coke were reviewed. The application of semi coke in water vapor activation, oxygen activation, alkali activation and nitric acid activation was introduced in recent years. The development of semi-coke modification technology direction.