采用水热法合成了金属-有机骨架材料 MIL-53(Al,Fe,Cr),并用 X射线衍射(XRD)、氮气吸/脱附等进行了测试表征.利用固定床吸附试验装置和气相色谱测定了在298 K,101 kPa 时,MIL-53(Al,Fe,Cr)对二氯甲烷、三氯甲烷的吸附情况.结果表明,二氯甲烷比三氯甲烷更易被MIL-53(Al,Fe,Cr)吸附,且 MIL-53(Al)对氯代甲烷的吸附能力最强,MIL-53(Cr)次之,MIL-53(Fe)最弱,MIL-53(Al)对二氯甲烷和三氯甲烷的吸附量最高分别可达16．88和7．11 mmol/g.实验结果与巨正则系综蒙特卡洛(GCMC)模拟结果一致.
MIL-53(Al,Fe,Cr)were synthesized by hydrothermal method.Resulting samples were characterized by X-ray diffraction (XRD)and N2 adsorption-desorption.The adsorption behavior of dichloromethane (CH2 Cl2 )and chloroform (CHCl3 )on MIL-53(Al,Fe,Cr)was studied at 298 K,101 kPa using a fixed bed continu-ous flow reactor and a gas chromatography.The experimental results indicated that MIL-5 3 (Al,Fe,Cr)have better adsorption capacity for CH2 Cl2 than CHCl3 ,the adsorption capacity for chloromethane was in the order MIL-53(Al)>MIL-53 (Cr)>MIL-53 (Fe),and the maximum adsorption amount for CH2 Cl2 and CHCl3 on MIL-53(Al)were 16.88 mmol/g and 7.11 mmol/g,respectively.In addition,the results of adsorption experi-ments were supported by the Grand canonical Monte Carlo (GCMC)simulation.
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