Article
Effect of the porous structure of the support on hydrocarbon distribution in the FischereTropsch reaction
Autor
Bartolini, Mónica
Molina, Jhoanna
Alvarez, Juan
Goldwasser, Mireya
Pereira Almao, Pedro
Pérez Zurita, M. Josefina
Institución
Resumen
Emissions standards are increasingly stringent due mainly to its impact on the environment. Although
the diesel engine is an attractive solution for carbon dioxide reduction, a challenge remains to simultaneously
control nitrogen oxides and matter particulate emissions to accepted levels. On engine tests, it
has been observed that FischereTropsch diesel significantly reduces CO, HC, PAHs and particulate
emissions compared to oil derived diesel. However, selectivity control in Fischer Tropsch Synthesis is still
a key challenge due the Anderson-Schultz-Flory polymerization mechanism followed by hydrocarbon
distribution. In this work we are presenting the first steps towards a new strategy that can tune, in one
step, the selectivity to desired products by taking advantage of the shape selectivity properties of SBA-15
mesoporous silica used as support.
Co-SBA-15 (30%wt) catalysts with different pore size were prepared by excess solution impregnation.
Our results show that pore diameter not only affects the size and reducibility of Co particles but it also
significantly influence the liquid products distribution, with the high molecular weight hydrocarbon
fraction increasing on large pores, attributed to the existence of a shape selectivity effect induced by the
textural properties of the catalyst namely its pore size and pore volume.