| 摘要 |
<p>PURPOSE:To carry out efficiently catalytic cracking of heavy oil and simultaneously prepare hydrogen, by carrying out various processes such as cracking, reduction, oxidation and desulfurization in the combination of them with each other using an iron-containing catalyst with an iron content of 30wt% or more in the form of iron oxide. CONSTITUTION:Heavy oil introduced from a pipe 2 is cracked in a catalyst bed 3 at 500-800 deg.C, and the resulting cracked gas and light oil are exhausted from a pipe 5. On the other hand, the resulting coke along with sulfur compounds in the heavy oil adheres to the surface of catalyst articles (crackin process 1). Subsequently, the above- mentioned catalyst is brought into contact with an insufficient amount of air introduced from a pipe 8 at 750-950 deg.C to convert the sulfur compounds into iron sulfide, and, on the other hand, the resulting CO and CO2 are exhausted from a pipe 10 (reduction process 7). Next, the above-mentioned catalyst in a reduced state is brought into contact with steam introduced from a pipe 14 at 600-850 deg.C, and the resulting hydrogen is exhausted from a pipe 16 (oxidation process 13). Next, the above-mentioned catalyst in a oxidized state is brought into contact with steam introduced from a pipe 19 at 600- 850 deg.C to decompose the iron sulfide and regenerate the catalyst, and the resulting hydrogen sulfide is exhausted from a pipe 21 (desulfurization process 18).</p> |
