Fe-PILCs are very active catalysts for the HDP of VOOEP. When
the catalysts are sulfidedsomeof the iron is segregated from the pillars
forming a well dispersed pyrrhotite-type iron sulfide (Fe1−xS),
while another important portion of the iron remains forming Fe-
PILC. Both, the iron sulfide and the iron in the pillars, are active for
the decomposition of the VOOEP.