微波辅助苯乙基苯醚催化降解反应动力学  

Kinetics study on microwave-assisted catalytic decomposition of phenylethyl phenyl ether

作　　者：潘晶莹[1] 熊俊[1] 吕秀阳[1] 

机构地区：[1]浙江大学生物质化工教育部重点实验室,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2013年第6期1104-1108,共5页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(20976160,21176218);国家“863”高技术研究发展计划资助项目(2012AA040211)

摘　　要：以苯乙基苯醚(PPE)为木质素模型物质,四氢萘为溶剂和供氢剂,对甲苯磺酸(PTSA)为催化剂,研究PPE在微波和四氢萘作用下的降解规律,总结了微波对降解反应的影响并推断PPE在四氢萘和PTSA作用下的降解机理.高效液相识谱法的分析结果表明:随着PPE初始质量密度的升高,PPE的转化率有所下降;随着PTSA质量密度的升高,PPE的转化率也不断升高.相对于普通的热传导加热,微波对PPE的催化降解反应起到了比较明显的促进作用,降解反应的表观活化能下降了27.7%.Employing phenylethyl phenyl ether （PPE） as a lignin model compound, tetralin as a solvent and hydrogen-donor, toluene-4-sulfonic acid （PTSA） as a catalyst, the regularity of decomposition of PPE was studied with the microwave and tetralin. The effect of microwave to the reaction was discussed and a possible mechanism on the degradation with the microwave and tetralin was presented. The HPLC results indicated that the conversion of PPE decreased with the increase of initial mass density of PPE and was improved with the increase of mass density of PSTA. Compared to reactions with traditional heat conduction, microwave irradiation promoted the decomposition reaction of PPE significantly, and the apparent activation energy for PPE decomposition with microwave decreased by 27.7%.

关 键 词：木质素 苯乙基苯醚 微波 四氢萘 

分 类 号：TQ35[化学工程] O643[理学—物理化学]