Ru/TiO2催化L-赖氨酸脱羧反应性能  

Decarboxylation of L-lysine over Ru/TiO2 catalysts

作　　者：李佳霖 石坚 余秦伟[1] 张前[1] 王为强[1] 杨建明[1] 吕剑[1] Li Jialin;Shi Jian;Yu Qinwei;Zhang Qian;Wang Weiqiang;Yang Jianming;Lü Jian(Xi'an Institute of Modern Chemistry,Xi'an 710065,Shaanxi,China)

机构地区：[1]西安近代化学研究所,陕西西安710065

出　　处：《工业催化》2020年第9期73-77,共5页Industrial Catalysis

摘　　要：化学催化法是实现氨基酸脱羧反应的关键科学途径,使用自制的Ru/TiO2催化剂对L-赖氨酸进行脱羧反应,研究还原温度对催化剂活性的影响,发现500℃还原的催化剂具有最高的脱羧活性。通过反应条件优化,表明低于6 MPa和8 h,选择性和转化率随初始压力和反应时间增加而增加,继续增加压力和反应时间则发生脱氨副反应,选择性降低;磷酸与L-赖氨酸物质的量比为3时,有利于1,5-戊二胺的生成。Chemical catalysts for amino acids decarboxylation have promising application prospects.In this study,home-made Ru/TiO2 catalysts were used for L-lysine decarboxylation reaction.And the influence of reduction temperature was systematically investigated.Catalyst reduced at 500℃had best decarboxylationactivity.The results showed that conversion and selectivity increased with the increasing of initial reaction pressure and reaction time when pressure was lower than 6 MPa,reaction reaction time was less than 8 h.Then,selevtity decreased to continue to increasereaction pressure and time because of deamination side reaction.It was favorable for decarboxylation of amino acids to add 3 times of phosphoric acid.

关 键 词：精细化学工程 脱羧反应 钌基催化剂 金红石二氧化钛 L-赖氨酸 

分 类 号：TQ426.94[化学工程] TQ225.26