摘要
利用酸改性和负载钼的酸改性高岭土作为吸附剂研究了环己烷中的卟啉钒(钒氧-2,3,7,8,12,13,17,18-八乙基卟啉,VO-OEP)在这两种吸附剂上的吸附行为,从热力学角度探讨了吸附机理。结果表明,两种吸附剂对卟啉钒的吸附符合Langmuir吸附等温线,卟啉钒单层吸附在改性高岭土上;吸附表现为自发热过程,吸附热均大于40 kJ/mol,说明吸附形成了化学键。
The acid modified VO-OEP in eyclohexane kaolinite and Mo supported on acid modified kaolinite were used as the adsorbents for The adsorption behavior as well as adsorption mechanism were investigated thermodynamically. The results show that the adsorption process follows the Langmuir＇s isotherms, indicating a monolayer VO-OEP adsorbed on the modified kaolinite. The adsorption of VO-OEP on the modified kaolinite is exothermic in nature with the adsorption heat exceeding 40 kJ/mol, which illustrates that chemical bonds are formed between VO-OEP and the modified kaolinite by adsorption.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2010年第1期63-68,共6页
Journal of Fuel Chemistry and Technology
基金
中国石油科技创新基金(2008D-5006-04-03)
关键词
卟啉钒
改性高岭土
吸附
热力学
VO-OEP
modified kaolinite
adsorption
thermodynamics
