Influence of noble metals (Pd, Pt) on the performance of Ru/Al2O3 based catalysts for toluene hydrogenation in liquid phase

被引：38

作者：

Suppino, Raphael Soeira ^{[1
]}

Landers, Richard ^{[2
]}

Gomez Cobo, Antonio Jose ^{[1
]}

机构：

[1] Univ Estadual Campinas, Sch Chem Engn, Dept Chem Syst Engn, Lab Dev Catalyt Proc, BR-13083852 Campinas, SP, Brazil

[2] Univ Estadual Campinas, Gleb Wataghin Inst Phys, Dept Appl Phys, Surface Phys Lab, BR-13083859 Campinas, SP, Brazil

来源：

APPLIED CATALYSIS A-GENERAL | 2016年 / 525卷

关键词：

Noble metal; Alumina; Catalyst activation; Formaldehyde; Toluene hydrogenation; SUPPORTED PALLADIUM CATALYSTS; BENZENE PARTIAL HYDROGENATION; SOLVENTS IMPREGNATION METHOD; PT-RU CATALYSTS; SELECTIVE HYDROGENATION; RUTHENIUM CATALYSTS; CYCLOHEXENE; CARBON; REDUCTION; AROMATICS;

D O I：

10.1016/j.apcata.2016.06.038

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Catalytic hydrogenation of aromatic compounds is of great interest due to environmental aspects and the wide range of industrial processes involving such reaction. In this context, the present work aims to study the influence of Pd or Pt addition on the performance of Ru/Al2O3 based catalysts for toluene hydrogenation in liquid phase. For this, catalysts were prepared by wet impregnation from chlorinated precursors and reduced in liquid phase by formaldehyde (H2CO). After impregnation, a part of the catalysts were activated ex situ at 573 K or in situ at 523 K under H-2. The studied solids were characterized by N-2 physisorption, SEM + EDX, TEM, XPS and TPR techniques. Catalytic tests were conducted in a slurry Parr reactor at 373 K under constant H-2 pressure of 5 MPa. Results show that solids reduction by H2CO led to metallic species, while the activation treatments form oxides and decrease the catalytic activity. The initial reaction rate of non-activated monometallic catalysts follows the order: Ru/Al2O3 >> Pd/Al2O3 approximate to Pt/Al2O3. A synergistic effect on the activity of RU/Al2O3 based catalysts is induced by the Pt addition. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：41 / 49

页数：9

共 50 条

[1] Hydrogen Storage in Liquid Organic Hydride: Producing Hydrogen Catalytically from Methylcyclohexane [J].

Alhumaidan, Faisal ;

Cresswell, David ;

Garforth, Arthur .

ENERGY & FUELS, 2011, 25 (10) :4217-4234

[2] Mathematical modeling of o-xylene hydrogenation kinetics over Pd/Al2O3 [J].

Backman, H ;

Neyestanaki, AK ;

Murzin, DY .

JOURNAL OF CATALYSIS, 2005, 233 (01) :109-118

[3] Propane dehydrogenation over supported Pt and Pt-Sn catalysts: Catalyst preparation, characterization, and activity measurements [J].

Barias, OA ;

Holmen, A ;

Blekkan, EA .

JOURNAL OF CATALYSIS, 1996, 158 (01) :1-12

[4]

Belskaya O. B., 2011, SMART NANOCOMPOSITES, V1, P99

[5]

Brunelle J.P., 1979, STUDIES SURFACE SCI, P211

[6]

Bu J, 2007, STUD SURF SCI CATAL, V165, P769

[7] Composition regulation of bimetallic RuPd catalysts supported on porous alumina spheres for selective hydrogenation [J].

Chen, Jiali ;

Liu, Xin ;

Zhang, Fazhi .

CHEMICAL ENGINEERING JOURNAL, 2015, 259 :43-52

[8] Effect of the support in Pt and PtSn catalysts used for selective hydrogenation of carvone [J].

de Miguel, SR ;

Román-Martínez, MC ;

Cazorla-Amorós, D ;

Jablonski, EL ;

Scelza, OA .

CATALYSIS TODAY, 2001, 66 (2-4) :289-295

[9] The partial gas-phase hydrogenation of benzene to cyclohexene on supported and coated ruthenium catalysts [J].

Dietzsch, E ;

Claus, P ;

Hönicke, D .

TOPICS IN CATALYSIS, 2000, 10 (1-2) :99-106

[10] Catalytic Deoxygenation of Methyl-Octanoate and Methyl-Stearate on Pt/Al2O3 [J].

Do, Phuong T. ;

Chiappero, Martina ;

Lobban, Lance L. ;

Resasco, Daniel E. .

CATALYSIS LETTERS, 2009, 130 (1-2) :9-18

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