ABSTRACT
ABSTRACT A new concept is presented for preparation of hydrotreating catalysts and involves supporting MoS2 on pillared and delaminated interlayered clays dispersed in 7 -alumina. The modified composite supports were designed to counteract fouling and coking by problematical feedstock components. Details of characterization and testing of Ni-Mo catalysts prepared using synthetic and naturally occurring smectite clays are presented. Characterization of support material and finished catalyst using transmission electron microscopy (ТЕМ) showed unique surface chemical structures. Dispersion of MoS2 appeared to be controlled by interaction with delaminated clay particles dispersed within the support. ТЕМ results also suggest that the dispersed clay induced stacking of MoS2 crystallites. Pyridine/FTIR adsorption studies also confirmed a modified surface acidity. Catalyst resistance to deactivation by adsorption of foulants was demonstrated through time-on-stream monitoring of nitrogen conversion during hydrotreating of coal-derived liquid. Catalyst activity for heteroatom conversion was evaluated by hydrotreating heavy gas oil derived from coprocessing coal/bitumen.
