Highly Selective Cu-Modified Ni/SiO2–Al2O3 Catalysts for the Conversion of Maleic Anhydride to γ-Butyrolactone in Gas Phase

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• 作者：M. E. Bertone ; S. A. Regenhardt ; C. I. Meyer ; V. Sebastian…
• 关键词：Selective hydrogenation ; Maleic anhydride ; γ ; Butyrolactone ; Cu–Ni catalysts ; Precipitation ; deposition method
• 刊名：Topics in Catalysis
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：59
• 期：2-4
• 页码：159-167
• 全文大小：895 KB
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• 作者单位：M. E. Bertone (1)
  S. A. Regenhardt (1)
  C. I. Meyer (1)
  V. Sebastian (2) (3)
  T. F. Garetto (1)
  A. J. Marchi (1)
  
  1. Catalysis Science and Engineering Research Group (GICIC), INCAPE, UNL-CONICET, Colectora Ruta Nac. Nº 168 Km. 0 – Paraje El Pozo, 3000, Santa Fe, Argentina
  2. Department of Chemical Engineering, Aragon Institute of Nanoscience (INA), University of Zaragoza, Campus Río Ebro-Edificio I+D, C/Poeta Mariano Esquillor S/N, 50018, Saragossa, Spain
  3. CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Campus Río Ebro-Edificio I+D, 50018, Saragossa, Spain
  
• 刊物主题：Catalysis; Physical Chemistry; Pharmacy; Industrial Chemistry/Chemical Engineering; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1572-9028

文摘

The gas phase hydrogenation of maleic anhydride (MA) to succinic anhydride (SA) and the subsequent hydrogenolysis to γ-butyrolactone (GBL) was studied on SiO₂–Al₂O₃-supported Ni catalysts modified with Cu and prepared by incipient wetness impregnation (Ni-I, CuNi-I) and coprecipitation-deposition (CuNi-PD) methods. The samples were characterized by N₂ adsorption at −196 °C, X-ray diffraction, temperature-programmed reduction, transmission electron microscopy and H₂ chemisorption. Catalytic tests were performed between 170 and 220 °C at atmospheric pressure in a fixed bed reactor. Crystalline NiO along with a Ni2+ phase strongly interacting with the support was observed in the oxide precursors. The extent of the strongly interacting Ni2+ phase diminishes according to the following pattern: CuNi-PD > CuNi-I > Ni-I, along with a proportional rise of the NiO phase. The proportion of small to large metal particles, formed after reduction, followed the same pattern as that observed for the extent of Ni2+ phase. All catalysts were very active in the MA hydrogenation to SA, but displayed distinct performances with respect to the subsequent SA hydrogenolysis. Hydrogenolytic activity and GBL yield increased following the same pattern as that obtained for the extent of Ni2+ phase. In addition, the effect of raising temperature on hydrogenolytic activity was more important in the case of Ni-I and CuNi-I than for CuNi-PD. Furthermore, CuNi-PD was more selective to GBL than CuNi-I. These results showed that there is an important effect of Cu addition and preparation method on both the structure and catalytic performance of the metal Ni phase. Keywords Selective hydrogenation Maleic anhydride γ-Butyrolactone Cu–Ni catalysts Precipitation-deposition method