4种分子筛对VOCs静态吸附与脱附性能研究

Study on static adsorption and desorption properties of VOCs by molecular sieves

采用干燥器-静态吸附法测定3A、4A、5A、10X四种分子筛对甲醇、苯、正己烷等VOCs的吸附性能。结果表明,10X分子筛在吸附量上明显高于其它3种分子筛,对苯、甲醇、正己烷的吸附量分别达到了96,88,75 mg/g。微波脱附和热脱附的脱附能力差别甚微,微波脱附时间短。分子筛再生率>95%,与之前吸附量相当,未对分子筛的内部结构产生影响。

The adsorption performance of four molecular sieves(3A,4A,5A,10X)on VOCs such as methanol,benzene and n-hexane was determined.The adsorption amount of 10X molecular sieve was significantly higher than that of the other three molecular sieves,and the adsorption amounts of benzene,methanol and n-hexane reached 96,88,75 mg/g,respectively.There is no difference in the desorption ability between microwave desorption and thermal desorption.After the desorbed molecular sieve is re-adsorbed,it is almost the same as the previous adsorption amount,and does not affect the internal structure of the molecular sieve.