Kinetics of deactivation on Cu/ZnO/Al2O3 methanol synthesis catalysts

被引：234

作者：

Fichtl, Matthias B. ^{[1
,2
]}

Schlereth, David ^{[1
,2
]}

Jacobsen, Nikolas ^{[3
]}

Kasatkin, Igor ^{[4
,5
]}

Schumann, Julia ^{[4
]}

Behrens, Malte ^{[4
]}

Schloegl, Robert ^{[4
]}

Hinrichsen, Olaf ^{[1
,2
]}

机构：

[1] Tech Univ Munich, Dept Chem, D-85748 Garching, Germany

[2] Tech Univ Munich, Catalysis Res Ctr, D-85748 Garching, Germany

[3] Clariant Prod Deutschland GmbH, BU Catalysts, D-83052 Bruckmuhl, Germany

[4] Max Planck Gesell, Fritz Haber Inst, Dept Inorgan Chem, D-14195 Berlin, Germany

[5] St Petersburg State Univ, Res Ctr Xray Diffract Studies, St Petersburg 199155, Russia

来源：

APPLIED CATALYSIS A-GENERAL | 2015年 / 502卷

关键词：

Heterogeneous catalysis; Methanol; Deactivation; Copper; Cu/ZnO/Al2O3; catalyst; IN-SITU; ELECTRON-MICROSCOPY; COPPER; CHEMISTRY; PRESSURE; DEFECTS; GAS; OIL; ZNO;

D O I：

10.1016/j.apcata.2015.06.014

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：

Deactivation behavior is an important topic in catalyst development. In case of methanol synthesis the conventional Cu/ZnO/Al2O3 system is commonly known to be prone to sintering, however, information about the structural development during deactivation or the sintering mechanism(s) are scarce. We present a systematic deactivation study on three different Cu/ZnO/Al2O3 catalysts which are aged under constant conditions and periodically analyzed using kinetic measurements and N2O chemisorption. A power law model for the catalyst activity with time on stream is derived. Furthermore it is found, that the presence of water provokes a steep loss in active surface area and specific activity. Also, the TEM particle size distributions generated during the aging treatment are evaluated and discussed. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：262 / 270

页数：9

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