DEACTIVATION OF A COAL-LIQUEFACTION CATALYST

A commercial coal liquefaction catalyst, Amocat 1A, has been subjected to a deactivation study in a laboratory catalytic coal liquefaction m icroreactor. Carbonaceous and metal deposits were the two major factor s causing catalyst deactivation. The carbonaceous material deposited p rimarily in the interior of the catalyst particle and clogged the pore s in a uniform manner. The metals deposit was rich in calcite and depo sition was mostly restricted to the external surface of the catalyst p article. It appears that either mechanism operating alone will complet ely deactivate the catalyst after processing roughly 1000 weights of c oal per weight of catalyst.