超临界CO_2氢化大豆油工艺优化及动力学分析  

Optimization and Kinetics of Hydrogenation of Soybean Oil in Supercritical CO_2

作　　者：王文华[1] 任悦[1] 王玉琦[1] 屈岩峰[1] 江连州[1] 于殿宇[1] 王立琦[2] WANG Wenhua;WANG Liqi;YU Dianyu;REN Yue;WANG Yuqi;QU Yanfeng;JIANG Lianzhou(College of Food Science, Northeast Agricultural University, Harbin 150030, China;School of Computer and Information Engineering, Harbin University of Commerce, Harbin 150028, China)

机构地区：[1]东北农业大学食品学院,黑龙江哈尔滨150030 [2]哈尔滨商业大学计算机与信息工程学院,黑龙江哈尔滨150028

出　　处：《食品科学》2017年第12期177-183,共7页Food Science

基　　金："十三五"国家重点研发计划重点专项(2016YFD0401402);国家自然科学基金面上项目(31271886)

摘　　要：以自制Ni-Ag/SBA-15为催化剂,在超临界CO_2条件下对氢化大豆油的工艺进行研究,其最佳工艺条件为CO_2压力8.0 MPa、氢气分压3.40 MPa、氢化温度100℃、催化剂用量0.20%、搅拌速率300 r/min、氢化时间90 min,产品碘值为86.0 g I_2/100 g,反式脂肪酸(trans fatty acids,TFAs)含量为11.7%;利用氢化动力学方程,运用MATLAB软件编辑运算程序,研究超临界CO_2氢化大豆油的反应速率与选择性,与常规状态下氢化进行比较,发现超临界CO_2状态氢化反应速率较快,且对亚麻酸及亚油酸有更好的氢化选择性。同时,在超临界CO_2条件下进行氢化,氢化大豆油产品中的TFAs和硬脂酸含量更低,分别为11.7%和9.4%。In this paper,Ni-Ag/SBA-15catalyst was used to catalyze the hydrogenation of soybean oil in supercriticalCO2.The optimum conditions were determined as follows:CO2pressure,8.0MPa;hydrogen partial pressure,3.40MPa;hydrogenation temperature,100℃;the amount of catalyst,0.20%;stirring speed,300r/min,and hydrogenation time,90min,giving a product with an iodine value of86.0g I2/100g,and a trans fatty acid(TFA)content of11.7%.Usinghydrogenation kinetic equation and MATLAB software program,the reaction rate and selectivity for supercritical CO2hydrogenation of soybean oil were investigated.Compared with conventional hydrogenation,the hydrogenation rate insupercritical CO2was higher,and the hydrogenation selectivity for linolenic acid and linoleic acid were better.At the sametime,the TFA and stearic acid contents of hydrogenated soybean oil products were11.7%and9.4%in supercritical CO2,which were lower than that from conventional hydrogenation.

关 键 词：Ni-Ag/SBA-15 超临界CO2 氢化大豆油 动力学 反应速率常数 

分 类 号：TS224.6[轻工技术与工程—粮食、油脂及植物蛋白工程]