苯在ZIF62材料上吸附等温线及其拟合研究.pdfVIP

苯在ZIF-62 材料上吸附等温线及其拟合 冯英子，夏启斌，李忠，奚红霞，陈汇勇 （华南理工大学传热强化与过程节能教育部重点实验室，广东 广州 510640 ） 摘要： 采用水热法合成了 ZIF-62 多孔材料，并对其表面形貌和比表面积孔结构进行了表征。测定苯在 ZIF-62 多孔材料上的吸附等温线并进行拟合，比较分析ZIF-62 和介孔分子筛 SBA-15 对苯的吸附性能的差异。结果表 明：苯在 ZIF-62 多孔材料上的吸附等温线为Ⅰ型 Langmuir 吸附等温线， Langmuir 方程可以很好地拟合苯在 ZIF-62 多孔材料上的吸附实验数据，25 ℃时，ZIF-62 对苯的平衡吸附量达到185mg/g。在压力小于p/p0=0.4 范围 内，ZIF-62 对苯蒸汽的吸附量要大于介孔分子筛SBA-15，在p/p0=0.1 左右，ZIF-62 对苯蒸汽的吸附量约为SBA-15 的两倍。 关键词：苯；ZIF-62 ；SBA-15；吸附等温线 中图分类号：TQ424 文献标识码：A Measurement and fitting of adsorption isotherms of benzene on ZIF-62 FENG Yingzi, XIA Qibin, LI Zhong, Xi Hongxia ，CHEN Huiyong （Enhanced Heat T rans f ers Energy Conservation , Ministry of Education , South China University of Technology , Guangzhou 510640 , Guangdong , China ） Abstract ：ZIF-62 was prepared via a hydrothermal method. The surface morphology, surface area and pore structure of ZIF-62 were studied. Adsorption isotherms of benzene on ZIF-62 and mesoporous molecular sieve SBA-15 were measured and fitted, and were compared. We found that: the adsorption isotherm of benzene on ZIF-62 is in accord with Ⅰ-type Langmuir isotherm. Langmuir function can fit the experimental adsorption data of benzene on ZIF-62. Under 25 ℃, the balance adsorption quantity reaches 185mg/g. When the relative pressure is smaller than 0.4, the adsorption quantity of benzene on ZIF-62 is more than that of benzene on SBA-15, and is twice as much as that of the latter at about p/p0=0.1. Key words ：benzene ；ZIF-62 ；SBA-15；adsorption isotherms 引 言 对其进行SEM 和比表面积孔结构表征，测定苯在 ZIF-62 多孔材料上的吸附等温线并进行拟合，比较 近年来，新一代沸石咪唑酯骨架结构材料