INTEGRAL IRON COBALT BIMETALLIC FISCHER-TROPSCH SYNTHESIS CATALYST AND PREPARATION METHOD THEREFOR

摘要

An integral iron cobalt bimetallic Fischer-Tropsch synthesis catalyst and a preparation method therefor. The catalyst comprises a porous metal iron carrier, a molecular sieve membrane coated on the surface of the porous metal iron carrier, and a metal active component loaded on the molecular sieve membrane. The porous metal iron carrier is an integral three-dimensional network structural carrier which is formed by: dividing a polyurethane foam into pieces to use as a template, immersing the same in a binder solution containing active powder alumina, potassium carbonate, calcium carbonate, magnetite and iron powder, drying and sintering so as to form the carrier. The weights of the major components in the integral three-dimensional network structural carrier satisfy the following mathematical relationship: Fe∶Al₂O₃:K₂O∶CaO＝100∶(1.5-6.0)∶(0.2-2.8)∶(0.2-3.2); the molecular sieve membrane is a cluster aggregate having uniformly dispersed ZSM-5 nanoparticles; and the load of the metal active component cobalt accounts 10-30% of the weight of the finished catalyst product. The catalyst has the advantages of having a large carrier surface area and strong catalyst adhesion performances. The catalyst preparation method is simple and the product performance is stable.