摘要：Abstract
This work deals with the improvement of diesel (C10‐C20) production of Fischer‐Tropsch (FT) synthesis at low pressure over Co‐Re/Al2O3 since high catalytic activity and great potential in producing C10‐C20 hydrocarbons were observed under conventional conditions. To improve the catalytic performance, CO conversion and hydrocarbon selectivity were investigated against pressure, syngas H2/CO ratio, gas flow rate, and temperature. 93.7 % of CO conversion was achieved as well as 62.3 % diesel selectivity over Co‐Re/Al2O3 catalyst even after working for 15 days, which was far higher than the maximum value of the Anderson‐Schulz‐Flory (ASF) distribution and the results in literature reports. It is suggested that Re plays an important role in enhancing dissociation of hydrogen as well as the formation of CH, CH2, and CH3 species to convert CO.
Co‐Re/Al2O3 with loadings of 20 g/g Co and 0.5 g/g Re was synthesized and exhibited excellent Fischer‐Tropsch catalytic activity and diesel (C10‐C20) selectivity. At the optimal conditions, 93.7 % of COconversion was achieved as well as 62.3 % diesel (C10‐C20) selectivity, which was far higher than the optimal result of Anderson‐Schulz‐Flory distribution and also better than the results in literature reports.
关键词：enFischer‐Tropsch synthesislow pressurediesel selectivitycatalytic conditionsAnderson‐Schulz‐Flory distribution
