摘要
Due to its high chemical stability,good thermal resis ta nce, ideal conductivity and ion-selective permeability, Nafion membrane has bee n used in many electrochemical systems.The significant progress has been made in the applied research of Nafion membranes in fuel cell, membrane separation and organic electro-synthesis.For organic electro-synthesis,the studies on permeat ion of organic compounds through the membrane were seldom reported in literature .3-methylpyridine is the main raw material for electrochemical synthesis of nia cin.In this work, the permeating fluxes of 3-methylpyridine were measured in th e H 2SO 4 aqueous solution at different concentrations and temperatures.The re sults showed that the permeating flux was directly proportional to the molar con centration of 3-methylpyridine at a given temperature.The relationship between the natural logarithm of proportional coefficient and the reciprocal of temperat ure was linear.The Arrhenius equation for the relationship between permeating fl ux and temperature was obtained.The apparent activation energy and apparent pre -exponential factor were estimated as 63.3 kJ·mol -1 and 2.69×108 m ·h -1.
Due to its high chemical stability, good thermal resistance, ideal conductivity and ion-selective permeability, Nafion membrane has been used in many electrochemical systems. The significant progress has been made in the applied research of Nafion membranes in fuel cell, membrane separation and organic electro-synthesis. For organic electro-synthesis, the studies on permeation of organic compounds through the membrane were seldom reported in literature. 3-methylpyridine is the main raw material for electrochemical synthesis of niacin. The permeating fluxes of 3-methylpyridine were measured in the H2SO4 aqueous solution at different concentrations and temperatures. The results showed that the permeating flux was directly proportional to the molar concentration of 3-methylpyridine at a given temperature. The relationship between the natural logarithm of proportional coefficient and the reciprocal of temperature was linear. The Arrhenius equation for the relationship between permeating flux and temperature was obtained. The apparent activation energy and apparent pre-exponential factor were estimated as 63.3 kJ·mol-1 and 2.69 × 108 m·h-1.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2005年第2期246-248,共3页
CIESC Journal
基金
河南省2003年重点攻关资助项目 (0323024900).~~
关键词
NAFION膜
3-甲基吡啶
渗透通量
电化学合成
Activation energy
Electrochemistry
Mechanical permeability
Solutions
Synthesis (chemical)
