坡缕石、硅胶及活性炭吸附VOC气体特性研究  

Studies on the Adsorption Properity of VOC by Palygorskite,Silica Gel and Activated Carbon

作　　者：闫奔 张辉[1] 

机构地区：[1]东南大学能源与环境学院

出　　处：《建筑热能通风空调》2017年第9期20-24,共5页Building Energy & Environment

摘　　要：考察了水、乙醇和甲苯分别在坡缕石上的吸附/脱附性能,同时与硅胶和活性炭的吸附/脱附性能进行对比。结果表明,吸附剂的吸附/脱附性能主要取决于吸附剂的比表面积和孔道尺寸,极性吸附剂的吸附/脱附性能还受吸附剂和吸附质极性的影响。三种吸附剂对水的吸附性能依次为:活性炭>硅胶>坡缕石。三种吸附剂对乙醇和甲苯的吸附量大小依次为:硅胶>活性炭>坡缕石。三种吸附剂的脱附再生性能依次为:坡缕石>硅胶>活性炭,其中乙醇和甲苯两种极性较小的VOC分子相对于极性较大的水分子更容易从坡缕石和硅胶中脱附。This work aimed to evaluate the adsorption and desorption performance of palygorskite for vapour, ethanol and toluene, which was also compared to that of silica and activated carbon. The result showed that, the adsorption and desorption performance of adsorbent mainly depends on the specific area and hole size of the adsorbent. Meanwhile, the molecular polarities of adsorbent and adsorbate also influence the perforrmance. The adsorption performance of these adsorbents rank as below： activated carbon〉silica gel〉palygorskite; The desorption performance of these adsorbents rank as below： palygorskite 〉silica gel〉 activated carbon. Compared with vapour, voc molecules such as ethanol and toluene, which have smaller polarity, can desorb from polygrskite and silica gel easier.

关 键 词：坡缕石 活性炭 硅胶 吸附/脱附 甲苯 乙醇 

分 类 号：X51[环境科学与工程—环境工程]