催化学报 ›› 2014, Vol. 35 ›› Issue (5): 656-662.DOI: 10.1016/S1872-2067(14)60051-6

• 研究论文 • 上一篇    下一篇

Levulinic acid hydrogenolysis on Al2O3-based Ni-Cu bimetallic catalysts

Iker Obregón, Eriz Corro, Urko Izquierdo, Jesus Requies, Pedro L. Arias   

  1. Department of Chemical and Environmental Engineering, School of Engineering, University of the Basque Country, UPV/EHU, Alameda Urquijo s/n, 48013 Bilbao, Spain
  • 收稿日期:2013-12-08 修回日期:2014-01-24 出版日期:2014-04-18 发布日期:2014-04-24
  • 通讯作者: Iker Obregón
  • 基金资助:

    This work was supported by the UPV/EHU, Spanish Ministry of Economy and Competitiveness CARBIOCAT (Project Ref. CTQ2012-38204-C03-03) and the Basque Government Predoc Training Programme and Department of Education and University (Project Ref. GIC 10/31 University).

Levulinic acid hydrogenolysis on Al2O3-based Ni-Cu bimetallic catalysts

Iker Obregón, Eriz Corro, Urko Izquierdo, Jesus Requies, Pedro L. Arias   

  1. Department of Chemical and Environmental Engineering, School of Engineering, University of the Basque Country, UPV/EHU, Alameda Urquijo s/n, 48013 Bilbao, Spain
  • Received:2013-12-08 Revised:2014-01-24 Online:2014-04-18 Published:2014-04-24
  • Contact: Iker Obregón
  • Supported by:

    This work was supported by the UPV/EHU, Spanish Ministry of Economy and Competitiveness CARBIOCAT (Project Ref. CTQ2012-38204-C03-03) and the Basque Government Predoc Training Programme and Department of Education and University (Project Ref. GIC 10/31 University).

摘要:

Inexpensive γ-alumina-based nickel-copper bimetallic catalysts were studied for the hydrogenolysis of levulinic acid, a key platform molecule for biomass conversion to biofuels and other valued chemicals, into γ-valerolactone as a first step towards the production of 2-methyltetrahydrofurane. The activities of both monometallic and bimetallic catalysts were tested. Their textural and chemical characteristics were determined by nitrogen physisorption, elemental analysis, temperature-programmed ammonia desorption, and temperature-programmed reduction. The monometallic nickel catalyst showed high activity but the highest by-product production and significant amounts of carbon deposited on the catalyst surface. The copper monometallic catalyst showed the lowest activity but the lowest carbon deposition. The incorporation of the two metals generated a bimetallic catalyst that displayed a similar activity to that of the Ni monometallic catalyst and significantly low by-product and carbon contents, indicating the occurrence of important synergetic effects. The influence of the preparation method was also examined by studying impregnated-and sol-gel-derived bimetallic catalysts. A strong dependency on the preparation procedure and calcination temperature was observed. The highest activity per metal atom was achieved using the sol-gel-derived catalyst that was calcined at 450 ℃. High reaction rates were achieved; the total levulinic acid conversion was obtained in less than 2 h of reaction time, yielding up to 96% γ-valerolactone, at operating temperature and pressure of 250 ℃ and 6.5 MPa hydrogen, respectively.

关键词: Levulinic acid, γ-Valerolactone, Hydrogenolysis, Biomass, Catalyst, Copper, Nickel

Abstract:

Inexpensive γ-alumina-based nickel-copper bimetallic catalysts were studied for the hydrogenolysis of levulinic acid, a key platform molecule for biomass conversion to biofuels and other valued chemicals, into γ-valerolactone as a first step towards the production of 2-methyltetrahydrofurane. The activities of both monometallic and bimetallic catalysts were tested. Their textural and chemical characteristics were determined by nitrogen physisorption, elemental analysis, temperature-programmed ammonia desorption, and temperature-programmed reduction. The monometallic nickel catalyst showed high activity but the highest by-product production and significant amounts of carbon deposited on the catalyst surface. The copper monometallic catalyst showed the lowest activity but the lowest carbon deposition. The incorporation of the two metals generated a bimetallic catalyst that displayed a similar activity to that of the Ni monometallic catalyst and significantly low by-product and carbon contents, indicating the occurrence of important synergetic effects. The influence of the preparation method was also examined by studying impregnated-and sol-gel-derived bimetallic catalysts. A strong dependency on the preparation procedure and calcination temperature was observed. The highest activity per metal atom was achieved using the sol-gel-derived catalyst that was calcined at 450 ℃. High reaction rates were achieved; the total levulinic acid conversion was obtained in less than 2 h of reaction time, yielding up to 96% γ-valerolactone, at operating temperature and pressure of 250 ℃ and 6.5 MPa hydrogen, respectively.

Key words: Levulinic acid, γ-Valerolactone, Hydrogenolysis, Biomass, Catalyst, Copper, Nickel