Fischer-Tropch Lab Report

1387 Words6 Pages
Fischer-Tropsch has enhanced strongly in recent years, due to considerations of resource use and the environment. Cobalt, iron and ruthenium supported catalysts are the best choice for the synthesis of long chain hydrocarbons from synthesis gas with a high ratio of / CO in H2. Search short shorts structural characteristics of cobalt catalyst that could affect the whole process of the Fischer-Tropsch process. Introduction The Fischer-Tropsch process is a set of chemical reactions that converts a mixture of carbon monoxide and hydrogen in the liquid hydrocarbons. The reaction takes place at 473 to 623 K and involves monometallic or bimetallic catalyst. Depending on the catalyst, the reactor conditions, the FT synthesis could produce a wide range…show more content…
The main function of the catalyst support is cobalt and dispersion stability for producing metallic cobalt catalyst particles after reduction and activation. Effective control of the dispersion of metal is often a problem in the design of effective supported metal catalysts. The porous support may control the size of supported cobalt particles. A "negative" support effect may be linked to the formation of mixed compounds bearing cobalt (aluminate and silicate). These cobalt support mixed compounds should be avoided because it does not produce the active sites for FT synthesis. Furthermore, the catalyst support can vary the diffusion of reactants and products inside the catalyst particles, the capillary condensation of the reaction products in the catalyst pores, heat dissipation and mechanical strength. The following paragraphs deal primarily support the chemical effects and texture effects in FT catalyst carrier catalytic…show more content…
All the samples exhibited type IV isotherm at high relative pressures (p/po), which is typical of meso-porous materials. There was a significant decrease in BET specific surface area and pore volume for alumina after metal impregnation. The specific surface area of alumina was found to be 190 m2/g while its pore volume was 0.1 cm3/g with a pore diameter of 9.8 nm. The surface area of Co/Al2O3 and Fe/Al2O3 was 180 m2/g and 165 m2/g, respectively. Pore volume and pore size of these catalyst samples were found to be less than those of the

More about Fischer-Tropch Lab Report

Open Document