氢在活性炭、石墨烯和金属有机骨架上的吸附平衡  

Analysis of the hydrogen adsorption behavior on the typical adsorbing materials

作　　者：朱子文 郑青榕 陈武 王泽浩 张维东 ZHU Zi-wen;ZHENG Qing-rong;CHEN Wu;WANG Ze-hao;ZHANG Wei-dong(Provincial Key Laboratory of Naval Architecture ＆ Ocean Engineering, Institute of Marine Engineering, Jimei University, Xiamen 361021, China)

机构地区：[1]集美大学轮机工程学院福建省船舶与海洋工程重点实验室,福建厦门361021

出　　处：《燃料化学学报》2018年第5期625-632,共8页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(51679107);厦门市科技计划(3502Z20173026)项目资助~~

摘　　要：为比较不同物理吸附材料的结构参数对其储氢性能的影响,制备和选取了具有超高比表面积的活性炭、石墨烯以及金属有机骨架(MOFs)作为低温吸附储氢的典型材料。首先,利用77 K下氮气在材料上的吸附数据确定了其BET比表面积以及孔径分布的主要结构参数。其次,利用3Flex全自动微孔吸附仪在77-87 K测试了0-0.1 MPa低压下氢在各材料上的吸附量,而后在0.1-8 MPa高压条件下利用PCTPro测试了氢在各材料上的过剩吸附量。最后,分析了各材料的储氢量与其结构参数间的关系。结果表明,在低压下,影响物理吸附材料储氢量的主要因素为孔径分布小于1 nm的微孔;而高压下,氢在多孔材料上的最大过剩吸附量与材料的BET比表面积呈正相关关系,斜率为0.0059 mmol/m2。For comparing the effects of the structural properties of adsorbents on the capability for hydrogen storage,three kinds of adsorbents, including activated carbon, graphene sheets（ GF） and metal-organic frameworks（ MOFs）,were synthesized and undertaken adsorption equilibrium tests of hydrogen at temperature of liquid nitrogen. The structural characterization of the prepared samples were firstly conducted employing Micromeritics 3 Flex for the adsorption data of nitrogen at 77 K. Then,the adsorption equilibrium tests of hydrogen on those adsorbents had been respectively measured under lowpressure of 0-0.1 MPa at temperature of77-87 K and under high pressure of 0.1-8 MPa at 77 K. Lastly,the relationships of the hydrogen uptake and the structural properties of the adsorbents were analyzed. Results showthat the hydrogen uptake of the physical absorbents is mainly affected by the micro-pores with pore size less than 1 nm under lowpressure,but under high pressure,the maximum amount of excess hydrogen adsorption on the porous material is positively correlated with the BET specific surface area of the material,and the slope is 0.0059 mmol/m2.

关 键 词：低温吸附储氢 活性炭 石墨烯 金属有机骨架 

分 类 号：O647.32[理学—物理化学]