Show simple item record

New insights in the deactivation of sulfonic modified SBA-15 catalysts for biodiesel production from low-grade oleaginous feedstock

dc.contributor.authorIglesias, Jose
dc.contributor.authorMelero, Juan A.
dc.contributor.authorBautista, L. Fernando
dc.contributor.authorMorales, Gabriel
dc.contributor.authorSánchez-Vázquez, Rebeca
dc.contributor.authorWilson, Karen
dc.contributor.authorLee, Adam F.
dc.identifier.citationApplied Catalysis A, General 488 (2014) 111-118
dc.descriptionLínea 8. Producción de biocombustibleses
dc.description.abstractArenesulfonic-acid functionalized SBA-15 materials have been used in the production of biodiesel from low grade oleaginous feedstock. These materials display an outstanding catalytic activity, being able to promote the transformation of crude palm oil with methanol into fatty acid methyl esters with high yield (85%) under mild reaction conditions. However, high sensitivity of the catalyst against poisoning by different substances has also been detected. Thus, alkaline metal cations, such as sodium or potassium exert a negative influence on the catalytic activity of these materials, being necessary amounts around 500 ppm of sodium in the reaction media to decrease the catalytic activity of these materials to a half of its initial value in just two reaction runs. The deactivation of arenesulfonic acid functionalized SBA-15 materials seems to occur in this case by ion exchange of the acid protons at the sulfonic groups. Organic unsaponifiable compounds like lecithin or retinol also induce a negative influence in the catalytic activity of these sulfonic acid-based materials, though not so intense as in the case of alkaline metals. The deactivating mechanism associated to the influence of the organic compounds seems to be linked to the adsorption of such substances onto the catalytic acid sites as well as on the silica surface. The accumulation of lecithin in the surface of catalyst, observed by means of thermogravimetric analysis, suggest the creation of a strong interaction, probably by ion pair, between this compound and the sulfonic acid
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subjectHeterogeneous acid catalystses
dc.subjectSulfonic acid catalystses
dc.subjectLow-grade feedstockes
dc.subjectSecond generation biodieseles
dc.titleNew insights in the deactivation of sulfonic modified SBA-15 catalysts for biodiesel production from low-grade oleaginous feedstockes
dc.subject.unesco2210.12 Teoría de las Células de Combustiblees
dc.description.departamentoTecnología Química y Ambiental

Files in this item

This item appears in the following Collection(s)

Show simple item record

Atribución-NoComercial-SinDerivadas 3.0 EspañaExcept where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España