摘要
针对吸附天然气(ANG)应用的吸附剂研发,试制了SAC-02活性炭、HKUST-1和MIL-101(Cr),通过微观形貌观察、氮气物理吸附和293.15–313.15 K、0–4 MPa条件下甲烷吸附等温线测定,采用Toth、D-A和Ono-Kondo等方程对实验数据进行关联预测比较,由等量吸附热和吸附相密度分析这些吸附剂样品对甲烷的吸附性能。结果表明,在测试范围内,Toth方程预测的吸附平衡数据精度最高,可用于ANG系统的吸附平衡分析;甲烷在MIL-101(Cr)上的平均等量吸附热最大,吸附相密度比液态甲烷的密度小但随压力的增高而增大,比活性炭和HKUST-1更适合于甲烷吸附。
To develop adsorbents suitable for the storage of natural gas by adsorption,activated carbon SAC-02,HKUST-1 and MIL-101(Cr)were synthesized and characterized in terms of structural morphology observation,nitrogen physisorption at 77.15 K,and methane adsorption at 293.15–313.15 K and 0–4 MPa.The methane adsorption isotherms were comparatively correlated with the Toth,D-A and Ono-Kondo equations and the performances of the adsorbent samples were evaluated in terms of the isosteric adsorption heat and the adsorbed phase density.The results indicate that in comparison with the D-A and Ono-Kondo equations,the Toth equation displays much smaller relative errors in correlating the methane adsorption data and is then more suitable for the adsorption equilibrium analysis on the adsorbed natural gas(ANG)system.MIL-101(Cr)exhibits the largest mean isosteric heat for methane adsorption and the density of the adsorbed methane phase is smaller than that of the liquid methane but increases with the equilibrium pressure;overall,MIL-101(Cr)with highest adsorption capacity is more suitable for methane adsorption than activated carbon and HKUST-1.
作者
郭栋
李姗姗
王虎
郑青榕
GUO Dong;LI Shan-shan;WANG Hu;ZHENG Qing-rong(Provincial Key Laboratory of Naval Architecture&Ocean Engineering,Institute of Marine Engineering,Jimei University,Xiamen 361021,China)
出处
《燃料化学学报（中英文）》
EI
CAS
CSCD
北大核心
2023年第12期1879-1888,共10页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金(51979121)
福建省自然科学基金重点项目(2020J02041)
厦门市科技计划项目(3502Z20226011)资助。
关键词
甲烷
活性炭
MOFS
吸附平衡
methane
activated carbon
MOFS
adsorption equilibrium
