Abstract
The effect of gas recirculation on the preparation of C35+ long-chain hydrocarbons on a supported Co-Al2O3/SiO2 catalyst at 6.0 MPa, 225°C, and the gas hourly space velocity of 1000 h–1 is studied. It is shown that the circulation regime allows the catalyst bed to be isothermal and improves the selectivity and productivity of C35+ hydrocarbons. It is found that the rate of catalyst deactivation slows by a factor of eight when the circulation ratio is raised from 2.2 to 6, while the amount of unsaturated hydrocarbons in the products of synthesis doubles.
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