APPARATUSES AND METHODS FOR FLUID CATALYTIC CRACKING WITH LIMITED PARTICULATE EMISSIONS

摘要

Methods and apparatuses are provided for cracking a hydrocarbon. The method includes contacting a first hydrocarbon stream with a cracking catalyst in a riser. The cracking catalyst is regenerated in a regenerator to produce a flue gas stream having a particulate concentration, where the flue gas stream is vented. A second stream is contacted with the cracking catalyst in the riser while the first hydrocarbon stream is contacted with the catalyst, where the second stream includes a natural oil. The particulate concentration is a second particulate concentration while the second stream contacts the cracking catalyst, and a first particulate concentration prior to the second stream contacting the cracking catalyst. The first particulate concentration is greater than the second particulate concentration.

主权项

1. A method of fluid catalytic cracking, the method comprising the steps of:
contacting a first hydrocarbon stream with a cracking catalyst in a riser; regenerating the cracking catalyst in a regenerator to produce a flue gas stream; venting the flue gas stream, wherein the flue gas stream comprises particulates at a particulate concentration; contacting a second stream with the cracking catalyst in the riser while contacting the first hydrocarbon stream with the cracking catalyst, wherein the second stream comprises a natural oil, and wherein the particulate concentration is a second particulate concentration while the second stream contacts the cracking catalyst, the particulate concentration is a first particulate concentration prior to the second stream contacting the cracking catalyst, and the second particulate concentration is less than the first particulate concentration.