New iron catalysts for the direct liquefaction of coal
Highly divided iron based catalysts for hydroliquefaction of coal have been prepared by a flame method. In order to preserve their original properties, an optimisation of process conditions has been conducted, using a specially designed batch reactor whose thermal performances allow simulation of continuous flow unit conditions. The evaluation of the catalysts in a multistage hydroliquefaction protocol has been carried out, comparing parameters related to coal conversion, hydrogen incorporation, kinetic data, solvent recycle capacity, analytical data of the resulting coal liquids and characterisation of the spent catalysts. The synthetic iron based catalysts of this study compare favourably with classical Ni-Mo/Al(2)O(3) and are clearly superior to red mud; furthermore, their properties can be improved by incorporation of small amounts of molybdenum. This result is explained in terms of external surface accessibility. The introduction of a dispersed catalytic phase by ion exchange has been explored as an alternative method in a low rank coal.
Bibliographic Reference: EUR 13043 EN (1990) 48 pp., MF, ECU 4
Record Number: 199011190 / Last updated on: 1994-12-01
Original language: en
Available languages: en