| 摘要 |
<p>The invention is directed to the preparation of higher hydrocarbons starting with lower hydrocarbons. A hydrocarbon stream (1) is desulfurized in zone (2), mixed with steam in line (4), the total mixture is subjected to steam reforming in zone (5) to obtain a mixture of hydrogen, carbon monoxide and carbon dioxide, which is treated in zone (8) to remove carbon dioxide. The synthesis gas (12) is subjected to Fischer-Tropsch process in zone (15) with iron catalyst, promoted by an alkali metal, preferably potassium, and optionally copper. The effluent from the Fischer-Tropsch process is subjected to a separation process in zone (18) to obtain a gaseous stream (19) which is recycled to the steam reforming zone (5), a liquid gasoline boiling hydrocarbon stream, light wax (22) and water/alcohol mixture. Heavy wax (26) from the Fischer-Tropsch process is subjected to cracking.</p> |
