Preparation of CuO-ZnO/Al2O3 Catalysts by Azeotropic Distillation Method and Its Influence on the Catalytic Performance

doi:10.11944/j.issn.1000-0518.2015.05.140295

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (5): 570-575.DOI: 10.11944/j.issn.1000-0518.2015.05.140295

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Preparation of CuO-ZnO/Al₂O₃ Catalysts by Azeotropic Distillation Method and Its Influence on the Catalytic Performance

JIA Ruokun^*, ZHAO Guangyu, LIN Songzhu, JIN Juncan

College of Chemical Engineering,Northeast Dianli University,Jilin,Jilin 132012,China

Received:2014-08-25 Revised:2014-12-04 Accepted:2015-01-07 Published:2015-05-05 Online:2015-05-05
Contact: JIA Ruokun
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Abstract

Abstract:

The CuO-ZnO/Al₂O₃ catalysts were successfully prepared using the coprecipitation-azeotropic distillation method using isobutyl alcohol as the azeotropic solvent. The catalysts were characterized by X-ray diffraction and thermogravimetry/differential thermal analysis and scanning electron microscopy. The results show that azeotropic distillation can effectively remove free water in the precursor sol to inhibit particle agglomeration and partial sintering caused by the heating process. At the same time combination of isobutanol and polyethylene glycol inhibits the Ostwald ripening of particles to obtain uniform particle size distribution and excellent dispersion of CuO components in catalyst particles. Direct hydrogenation of CO₂ to methanol was carried out in a fixed bed flow reactor. The experiments show that the catalysts prepared by the azeotropic distillation have better catalytic performance and stability than those the direct drying method.

Key words: azeotropic distillation method, CuO-ZnO/Al2O3 catalysts, CO2 hydrogenation, methanol synthesis

CLC Number:

JIA Ruokun, ZHAO Guangyu, LIN Songzhu, JIN Juncan. Preparation of CuO-ZnO/Al₂O₃ Catalysts by Azeotropic Distillation Method and Its Influence on the Catalytic Performance[J]. Chinese Journal of Applied Chemistry, 2015, 32(5): 570-575.

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Preparation of CuO-ZnO/Al₂O₃ Catalysts by Azeotropic Distillation Method and Its Influence on the Catalytic Performance

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