Sol-gel synthesis of nanoporous γ-alumina using TX-100 or gelatin/TX-100 mixture as effective catalysts for dehydration of alcohols
محورهای موضوعی : Iranian Journal of CatalysisSoheyl Alidoust 1 , Mehdi Zamani 2 , Morteza Jabbari 3
1 - School of Chemistry, Damghan University, Damghan 36716-41167, Iran
2 - School of Chemistry, Damghan University, Damghan 36716-41167, Iran
3 - School of Chemistry, Damghan University, Damghan 36716-41167, Iran
کلید واژه: Alkene, Dehydration, Gelatin, Alcohol, γ-Alumina, Triton X-100, Nanoporous,
چکیده مقاله :
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 yieldof 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.
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