摘要
以浸渍法制备Ru/Al2O3催化剂,研究在高压反应釜中Ru/Al2O3上催化加氢邻苯二甲酸二丁酯（DBP）合成1,2-环己烷二甲酸二丁酯（CDADE）。采用X射线衍射（XRD）、H2程序升温还原（H2-TPR）、扫描电镜（SEM）、X射线能谱仪（EDS）和透射电子显微镜（TEM）对催化剂进行表征。结果表明,Ru负载量为3.0%（质量分数）,200℃氢气气氛中还原的Ru/Al2O3催化剂,在催化DBP合成CDADE的反应中具有较高的催化活性。在反应温度80℃、反应压力2.0~2.5 MPa和搅拌转速800 r/min下,DBP转化率和CDADE选择性分别达到99.972%和99.904%,催化剂重复使用9次后仍有较高活性,但继续使用,由于活性组分Ru部分流失、团聚和催化剂表面积炭,催化剂活性有所下降。
Ru/Al2O3 catalysts were prepared by the impregnation method and catalytic hydrogenation of dibutyl phthalate to cyclohexane 1,2-dicarboxylic acid dibutyl ester was carried out in a high pressure reactor. The samples were characterized by X-ray diffraction（XRD）, scanning electron microscope（SEM）, H2temperature-programmed reduction（H2-TPR）, energy dispersive spectrometer（EDS） and transmission electron microscope（TEM）. The results showed that Ru/Al2O3 catalyst with Ru loading of 3% exhibited excellent catalytic performance when reduced at 200 ℃. The dibutyl phthalate conversion and 1,2-dicarboxylic acid dibutyl ester selectivity reached 99.904 % and 99.972 %, respectively, under the conditions of 80 ℃, 2.0-2.5 MPa and stirring speed of 800 r/min. Ru/Al2O3 catalyst showed the catalytic stability till reuse nine times. The deactivation of Ru/Al2O3 catalysts was mainly due to the loss and aggregation of Ru and carbonization over catalysts surface.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2015年第2期156-163,共8页
Chemical Reaction Engineering and Technology
基金
江苏省科技厅产学研前瞻(BY2012033)
关键词
钌
邻苯二甲酸二丁酯
催化加氢
1
2-环己烷二甲酸二丁酯
ruthenium
dibutyl phthalate
catalytic hydrogenation
cyclohexane 1,2-dicarboxylic aciddibutyl ester
