TY - JOUR
T1 - 贵金属负载型核壳结构催化剂的制备及其催化性能
AU - Wang, Darui
AU - Wang, Zhendong
AU - Zhang, Bin
AU - Sun, Hongmin
AU - Wu, Peng
AU - Gao, Zi
AU - Yang, Weimin
N1 - Publisher Copyright:
© 2017, Editorial Board of Journal of Chemical Reaction Engineering and Technology. All right reserved.
PY - 2017/8/25
Y1 - 2017/8/25
N2 - Core-shell structured zeolites with ZSM-5 as core and dendritic SiO 2 as shell were successfully prepared using cetyltrimetylammonium bromide (CTAB) as surfactant, urea as alkaline source and tetraethyl orthosilicate (TEOS) as silicate source in the microemulsion system composed of cyclohexane and n-pentanol. The effects of the preparation conditions such as temperature, time, addition of urea and TEOS on the preparation of the catalyst were investigated. The zeolites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N 2 adsorption-desorption. The results indicated that the obtained core-shell structured zeolites exhibited excellent monodispersity, integrity and hydrothermal stability when the preparation temperature was between 100-120, reaction time was 4 h, the molar ratio of urea ℃ to TEOS was 1 and the molar ratio of TEOS to ZSM-5 was 0.9-1.2. Finally, the noble metal Pt was loaded on the dendritic mesoporous SiO 2 shell and the obtained bifunctional catalysts of Pt/ZSM-5@MS exhibited high catalytic activity and reusability in the one-pot preparation of methyl isobutyl ketone (MIBK) from acetone.
AB - Core-shell structured zeolites with ZSM-5 as core and dendritic SiO 2 as shell were successfully prepared using cetyltrimetylammonium bromide (CTAB) as surfactant, urea as alkaline source and tetraethyl orthosilicate (TEOS) as silicate source in the microemulsion system composed of cyclohexane and n-pentanol. The effects of the preparation conditions such as temperature, time, addition of urea and TEOS on the preparation of the catalyst were investigated. The zeolites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N 2 adsorption-desorption. The results indicated that the obtained core-shell structured zeolites exhibited excellent monodispersity, integrity and hydrothermal stability when the preparation temperature was between 100-120, reaction time was 4 h, the molar ratio of urea ℃ to TEOS was 1 and the molar ratio of TEOS to ZSM-5 was 0.9-1.2. Finally, the noble metal Pt was loaded on the dendritic mesoporous SiO 2 shell and the obtained bifunctional catalysts of Pt/ZSM-5@MS exhibited high catalytic activity and reusability in the one-pot preparation of methyl isobutyl ketone (MIBK) from acetone.
KW - Bifunction
KW - Core-shell structure
KW - Hierarchical pore
KW - Methyl isobutyl ketone
KW - Noble metal
UR - https://www.scopus.com/pages/publications/85062392019
U2 - 10.11730/j.issn.1001-7631.2017.04.0289.09
DO - 10.11730/j.issn.1001-7631.2017.04.0289.09
M3 - 文章
AN - SCOPUS:85062392019
SN - 1001-7631
VL - 33
SP - 289
EP - 297
JO - Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology
JF - Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology
IS - 4
ER -