| 摘要 |
<p>Combustible carbonaceous particles such as particles of sponge coke or coal are incorporated with the circulating inventory of cracking catalyst in a fluid catalytic cracking unit. The fluid catalytic cracking unit comprises a riser reactor (4) and a regeneration zone (42). The carbonaceous particles selectively sorb metal contaminants in the feed (2), thereby extending catalyst life, and they also serve to reduce NOx emissions in certain instances. The sorbed metals values may be recovered by burning the carbonaceous particles.</p> |
