Effect of NaNO2, HNO3 and H2SO4 on the structure and reactivity of gamma-alumina

PDF HTML
  • Abdol Hossein Dabbagh1,
  • Marzie Naderi1,
  • Mehdi Zamani*2,
  1. Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Iran.
  2. School of Chemistry, Damghan University, Damghan 36716-41167, Iran

Published in Issue 2024-02-03

How to Cite

Dabbagh, A. H., Naderi, M., & Zamani, M. (2024). Effect of NaNO2, HNO3 and H2SO4 on the structure and reactivity of gamma-alumina. Iranian Journal of Catalysis, 10(1). https://oiccpress.com/ijc/article/view/3542

PDF views: 215

HTML views: 66

Abstract

The influence of NaNO2, HNO3 and H2SO4 on the structure and morphology of gamma-alumina was investigated by XRD, BET, SEM and FT-IR spectroscopy. Selected amounts of NaNO2, HNO3 and H2SO4 were added to a solution of aluminum isopropoxide (as a precursor for the boehmite synthesis). The boehmite samples were calcined at 350 and 600 â to form the semi-crystalline high surface area gamma-Al2O3. The reactivity and selectivity of the modified gamma-alumina catalysts were examined using dehydration reaction of 2-octanol. There was a good correlation between reactivity, selectivity and the amounts (and type) of the modification. The dominant product was cis-2-octene for all of the catalysts. Low conversion and high selectivity were obtained for dehydration of 2-octanol over alumina modified with NaNO2. High conversion, low selectivity and excessive isomerization were found for gamma-alumina catalyst modified with H2SO4.

Keywords

  • Alcohol,
  • Alumina,
  • Dehydration,
  • reactivity,
  • Selectivity.
PDF HTML