Catalytic dehydration of 2 propanol over Al2O3-Ga2O3 and Pd/Al2O3-Ga2O3 catalysts

被引：17

作者：

Diaz de Leon, J. N. ^{[1
]}

Cruz-Taboada, A. ^{[1
]}

Esqueda-Barron, Y. ^{[1
]}

Alonso-Nunez, G. ^{[1
]}

Loera-Serna, S. ^{[2
]}

Venezia, A. M. ^{[3
]}

Poisot, M. E. ^{[4
]}

Fuentes-Moyado, S. ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, Ctr Nanociencias & Nanotecnol, Km 107 Carretera Tijuana Ensenada,Apdo Postal 14, Ensenada 22800, Baja California, Mexico

[2] Univ Autonoma Metropolitana Azcapotzalco, Cdmx, Mexico

[3] Ist Studio Mat Nanostrutturati, Via U La Malfa 153, I-90146 Palermo, Italy

[4] Univ Papaloapan, Div Estudios Posgrad, Circuito Cent 200, Oaxaca 68301, Oaxaca, Mexico

来源：

CATALYSIS TODAY | 2020年 / 356卷

关键词：

Catalytic dehydration; 2-Propanol; Palladium; Mixed oxides; Alumina; Gallium; Nanoparticles; OXIDANT-FREE DEHYDROGENATION; ACID-BASE SITES; 2-PROPANOL DEHYDRATION; PALLADIUM NANOPARTICLES; ETHANOL DEHYDRATION; PD NANOPARTICLES; GALLIUM; HYDRODESULFURIZATION; SURFACES; ALCOHOLS;

D O I：

10.1016/j.cattod.2019.05.024

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of mixed Al2O3-Ga2O3 oxides were prepared with different Ga2O3 content (labeled as AlGa-x; where x is the wt % of Ga2O3) by precipitation method. The oxides were then used as supports of palladium (2 wt %) catalysts (labeled as Pd/AlGa-x). Both series of samples, AlGa-x and Pd/AlGa-x were characterized by several techniques such as Raman spectroscopy, XPS, XRD, SEM, and HRTEM, and were tested in the 2-propanol dehydration reaction. The steady-state conversions displayed by the Pd/AlGa-x series was almost twice as that obtained for the AlGa-x series in all the range of tested temperatures. It was worth noting that the presence of palladium changed the yield observed for the AlGa-x series mainly at low temperatures. While at high temperatures the Lewis acidity provided by the well dispersed Pd nanoparticles increased the activity considerably and improved the propylene production. A balance between the dispersion of palladium and the surface acidity, both related to the Ga2O3 content was responsible for the observed catalytic behavior.

引用

页码：339 / 348

页数：10

共 49 条

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