PROCESS FOR PREPARING HYDROCARBONS FROM CARBON DIOXIDE AND HYDROGEN, AND A CATALYST USEFUL IN THE PROCESS

摘要

The invention relates to a process for producing hydrocarbons from carbon dioxide and hydrogen, wherein carbon dioxide is converted with hydrogen in the presence of a special catalyst. By means of the process according to the invention C5-C15 hydrocarbons which are of interest as fuels (benzine, diesel, kerosene) can be formed with very high selectivity. Furthermore, in the process C2-C4 hydrocarbons, which can be used as valuable starting materials in the chemical industry, are produced with good selectivity. In the process a high conversion of CO2 is already achieved without any recirculation of excess carbon dioxide. According to another aspect, the invention relates to the catalysts as such.

主权项

1. A process for producing hydrocarbons from carbon dioxide and hydrogen wherein carbon dioxide is converted with hydrogen in the presence of a catalyst, the catalyst containing iron and at least one alkali metal and furthermore fulfilling at least one of the following features (i) to (iii):
(i) in relation to the overall weight of the catalyst, the catalyst contains iron in an amount of at least 10% by weight, preferably of 15 and 35% by weight, and furthermore copper, and at least one additional representative selected from magnesium, zinc, lanthanum and zirconium; (ii) the catalyst comprises TiO2 and/or an aluminum magnesium hydroxycarbonate as a catalyst carrier; iii) the catalyst also contains ruthenium and/or cobalt.