Sol-gel synthesis of nanoporous γ-alumina using TX-100 or gelatin/TX-100 mixture as effective catalysts for dehydration of alcohols

Document Type: Articles

Authors

School of Chemistry, Damghan University, Damghan 36716-41167, Iran

Abstract

In this study, the nanoporous γ-alumina catalysts were prepared by the sol-gel method using hydrolysis of aluminum isopropoxide in the presence of TX-100 or gelatin/TX-100 mixture. Catalysts were characterized by XRD, FT-IR, TEM, BET-BJH and N2 adsorption-desorption isotherms. To investigate reactivity and selectivity of the synthesized catalysts, dehydration reaction of 2-octanol was carried out in a plug flow vertical reactor at 200 °C. The main products of elimination reaction were 1-octene, 3-octene, cis- and trans-2-octene, which were identified by GC-MS. The reaction conversion and yield of the products were determined using GC. The prepared catalysts had nanometer-sized pores, high surface area and large pore volume. Their catalytic activity for dehydration of 2-octanol was higher than non-porous γ-alumina catalysts. These compounds could be used as effective catalysts for dehydration of alcohols.

Graphical Abstract

Sol-gel synthesis of nanoporous γ-alumina using TX-100 or gelatin/TX-100 mixture as effective catalysts for dehydration of alcohols

Highlights

  • Nanoporous γ-alumina catalysts were prepared using hydrolysis of aluminum isopropoxide in the presence of TX-100 or gelatin/TX-100
  • Catalysts were characterized by XRD, FT-IR, BET-BJH, TEM and N2 adsorption-desorption isotherms
  • Reactivity and selectivity of catalysts were examined using dehydration reaction of 2-octanol
  • The prepared catalysts have nanometer-sized pores, high surface areas and large pore volumes
  • High conversion and high selectivity for formation of 2-alkenes were found for g-alumina catalyst prepared using TX-100
  • The gelatin in gelatin/TX-100 catalyst reduces the size of catalyst pores which causes to increase of 1-ene formation

Keywords


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