Regeneration of the amorphous NiB/SiO2 catalyst poisoned by carbon disulfide in cyclopentadiene hydrogenation Original Research Article

The amorphous NiB/SiO2 catalyst was deactivated in partial hydrogenation of cyclopentadiene (CPD) containing 1000 ppm of carbon disulfide. After the reactivity had vanished, the catalyst was almost completely recovered by sequential base-wash and H2-sweep treatments. The base was alkaline ethanol. The results of XRD, DSC, XPS, EXAFS, IR, SEM-EDX, and H2 uptake measurements on the regenerated amorphous catalyst were almost the same as those on original counterparts. The regeneration operation was repeated several times, but its structural and chemical properties remained.