摘要
以Co-Al水滑石为前驱体,经高温焙烧和H2还原得到了系列可用于环氧丙醇加氢制备1,3-丙二醇(1,3-PDO)的Cox/Al2O3催化剂.研究结果表明, Co2/Al2O3催化剂具有最好的活性、产物选择性及良好的稳定性,在80℃, 2 MPa H2下反应5 h后,环氧丙醇的转化率为99.8%, 1,3-PDO的收率高达68.0%;不仅高于采用相同方法制备的Ni2/Al2O3和Cu2/Al2O3催化剂,也高于Al2O3负载的Pt, Pd和Ru催化剂.研究发现活性中心Co与Al2O3载体的酸性位点之间的协同作用可能是影响催化剂的活性及1,3-PDO选择性的重要因素.
1,3-propanediol(1,3-PDO)is an important intermediate for the synthesis of polytrimethylene terephthalate(PTT),and it is currently produced via the fermentation of glycerol.In this work,a series of Cox/Al2O3 catalysts were prepared via the controlled calcination and reduction of Co-Al hydrotalcite,which were introduced to catalyze the hydrogenation of glycidol to produce 1,3-PDO.The best performance was obtained over Co2/Al2O3 catalyst after 5 h of reaction at 80 ℃ and 2 MPa H2.The conversion of glycidol was 99.8%,and the yield of 1,3-PDO was 68.0%.This result is not only higher than that of the Ni2/Al2O3 and Cu2/Al2O3 catalysts prepared by the same method,but also higher than that of the Al2O3 supported Pt,Pd,Ru catalysts.Characterization results indicated that the interaction between active site Co and the acid site of the Al2O3 support is of great importance to the activity of the catalyst and the selectivity towards 1,3-PDO.
作者
蔡中顺
朱子慧
潘菁
孙妍妍
习玲玲
侯昭胤
CAI Zhongshun;ZHU Zihui;PAN Jing;SUN Yanyan;XI Lingling;HOU Zhaoyin(Key Laboratory of Biomass Chemical Engineering,Ministry of Education,Department of Chemistry,Zhejiang University,Hangzhou 310028,China)
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2020年第8期1818-1825,共8页
Chemical Journal of Chinese Universities
基金
国家自然科学基金(批准号:21473155,21273198,21773206)
浙江省自然科学基金(批准号:L12B03001)资助。
