SciELO - Scientific Electronic Library Online

 
vol.75 issue155DESIGN AND FABRICATION OF A MICROSYSTEM TO HANDLE BIOLOGICAL OBJECTSKYNETIC STUDY OF THE BIOMASS DEVOLATILIZATION PROCESS IN PARTICLES sizes between 2- 19 mm BY MEANS OF THERMOGRAVIMETRIC ANALYSIS author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Article

Indicators

Related links

  • On index processCited by Google
  • Have no similar articlesSimilars in SciELO
  • On index processSimilars in Google

Share


DYNA

Print version ISSN 0012-7353

Abstract

ROJAS, HUGO et al. HYDROGENATION OF FURFURAL ON Ir/Nb2O5 CATALYST STUDY KINETIC. Dyna rev.fac.nac.minas [online]. 2008, vol.75, n.155, pp.115-122. ISSN 0012-7353.

Kinetics of furfural hydrogenation over Ir/Nb2O5 catalyst with SMSI effect (Strong Metal Support Interaction) was studied. The effect of different parameters such as initial concentration (0,025 to 0,1 M), H2 pressure partial (0,48 to 0,98 MPa), temperature (353 to 393 K) and catalyst loading (0,1 to 0,4 g) were examined. A high selectivity towards unsaturated alcohol (furfuryl alcohol) using this catalyst was demonstrated. The effect of solvent also was studied. The alcoholic solvents produces acetals traces, especially 2,6-diethyl-acetal. The initial rates of furfural hydrogenation increased linearly with the catalyst loading, indicating absence of mass transfer effects. The reaction kinetics was represented by a Langmuir-Hinshelwood model (LH). A single site Langmuir-Hinshelwood type model suggesting the addition of a hydrogen atom on the organic molecules as the rate determining step provided the best fit of the experimental data.

Keywords : Hydrogenation; furfural; Nb2O5; kinetics; SMSI.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License