Silicon trapping mass
AssigneeIfp Energies Nouvelles
InventorsNicolas Legagneux, Marie-Claire Marion, Karin Barthelet, Patrick Euzen, Joseph Lopez
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Abstract
The present invention relates to a mass for trapping silicon compounds, comprising a porous alumina-based support and at least one metal chosen from the metals from groups VIB and VIIIB, and exhibiting a grain density of at least 1.20 g/ml, a specific surface of at least 300 m2/g and pores with a mean size of less than 6.5 nm, as determined by mercury porosimetry. The present invention also relates to a process for the preparation of said trapping mass and to a trapping process using said trapping mass.
Claims20
A mass for trapping silicon compounds, comprising:
- a porous alumina-based support and at least one metal chosen from the metals from groups VIB and VIIIB,
- wherein the porous support exhibits a grain density of at least 1.20 g/ml, a specific surface of at least 300 m2/g, and pores with a mean size of less than 6.5 nm, as determined by mercury porosimetry.
A process for the preparation of a mass for trapping silicon compounds, comprising the following stages:
- a) providing a porous alumina-based support exhibiting a grain density of at least 1.15 g/ml, a specific surface of at least 330 m2/g and pores with a mean size of less than 6.5 nm, as determined by mercury porosimetry;
- b) preparing an aqueous solution containing at least one dissolved metal M precursor, the metal M being chosen from the metals from groups VIB and VIIIB;
- c) impregnating the porous support resulting from stage a) with the solution obtained in stage b);
- d) maturing the impregnated support resulting from stage c);
- and
- e) drying the matured, impregnated support resulting from stage d).
Dependencies are inferred from the claim text.