DBU/甘油/CO_2反应过程及动力学  

Reaction progress and kinetics of CO_2 with glycerol in the presence of DBU

作　　者：张猛[1,2] 鲁厚芳[1,2] 梁斌[1,2] 刘颖颖[2] 郝晓刚[3] 

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]四川大学新能源与低碳技术研究院,四川成都610065 [3]太原理工大学化学工程系,山西太原030024

出　　处：《化工进展》2016年第10期3078-3085,共8页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金重点项目(21336008);国家自然科学基金面上项目(21476150);教育部博士点基金(20130181130006);山西省煤基重点科技攻关项目(MD2014-09)

摘　　要：1,8-二氮朵双环[5.4.0]十一碳-7-烯（DBU）-甘油溶液作为一种新型溶剂,具有低热容、高沸点等优点,目前被广泛研究应用于化学合成和产物分离等。本文考察了不同摩尔比的DBU-甘油溶液吸收CO2效果,测定了不同摩尔比的DBU-甘油溶液吸收CO2反应过程中体系的黏度变化,研究了DBU-甘油溶液吸收CO2反应的动力学。结果表明,在反应温度25℃、CO2气体流速为238m L/min的条件下,DBU与甘油摩尔比为0.49-1的溶液对CO2的吸收量可在120min的反应时间内达到10.88g/100g溶液;DBU与甘油摩尔比为0.49∶1和1.12∶1的溶液在吸收CO2后体系的黏度显著增大,而DBU与甘油摩尔比为0.11∶1和3.43∶1的溶液在吸收CO2后体系的黏度变化较小。25℃、常压下,在消除扩散影响,甘油大大过量时,DBU/甘油/CO2反应的速率方程为r=0.22CDBU20.5COP,反应的活化能为40.44k J/mol。1,8-diazabicyclo[5.4.0] undec-7-ene（DBU）/glycerol solution used as a new solvent,which has low heat capacity and high boiling point,has been widely studied in chemical synthesis and product separation. The absorption of CO2 at different ratios of DBU/glycerol solutions was investigated. It is shown that the amount of CO2 absorbed in this solution could reach 10.88g/100 g within 120 min at 25℃ under atmospheric pressure,0.49∶1 of the molar ratio of DBU to glycerol and 238 m L/min of the flow rate of CO2. The viscosity of the solution at different ratios during reaction was also measured. It increased with the increase of time and the amount of DBU when the molar ratio of DBU and glycerol was 0.49∶1 and 1.12∶1. But, when the molar ratio of DBU to glycerol was 0.11∶1 and 3.43∶1,the viscosity of the solution changed a little. Furthermore,the kinetics of carbon dioxide binding by DBU/glycerol solution was studied. The reaction rate of DBU/glycerol/CO2 can be expressed as r=0.22CDBU20.5COP at 25℃ without the effect of agitation under atmospheric pressure when glycerol is excessive. The activation energy of the reaction is 40.44 k J/mol.

关 键 词：1 8-二氮朵双环[5.4.0]十一碳-7-烯 甘油 二氧化碳 黏度 反应动力学 

分 类 号：O643.12[理学—物理化学]