Fischer-Tropsch synthesis coverage

The variation in promoter ability of (i) potassium and rubidium carbonates and (ii) the other carbonates may be attributable to subtle effects the active carbonates have on the surfaces and active sites of the catalyst. These effects may be caused by differences in basicity of the carbonates. According to Dry et al. (23), the promoter which is the strongest base is the most effective. The influence of base promoters on Fischer-Tropsch synthesis depends on their effect on the heat of adsorption of carbon monoxide and hydrogen on the catalyst, e.g., K2O increases the heat of carbon monoxide adsorption at low coverage and decreases the initial heat of hydrogen adsorption. 

The coverage on liquid fuels must include an account of the processes for synthesis of gasoline. The synthesis process is carried out by any one of the following (i) polymerization, (ii) Fischer-Tropsch method and (iii) Bergius process. The following description relates only to the first of these methods. 

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