Patent ID: 7572362
Filing Date: 2009-08-11
Classification: C10G

Abstract:
1. A method of reducing the hydrogen sulfide content of a product stream from upgrading a heavy hydrocarbon feedstock and reducing sulfur-based gas emissions in flue gas during said upgrading, comprising: (i) treating the heavy hydrocarbon feedstock with a first portion of calcium compound, (ii) introducing said treated feedstock to an upflow reactor, (iii) rapid thermal processing of the treated feedstock, wherein the rapid thermal processing comprises allowing the treated feedstock to interact with a particulate heat carrier in the upflow reactor run at a temperature in the reactor from 450 to 600° C. for less than 5 seconds, to produce a product stream, and wherein the ratio of the particulate heat carrier to the heavy hydrocarbon feedstock is from 10:1 to 200:1, and (iv) regenerating the particulate heat carrier in a reheater to form a regenerated particulate heat carrier, and (v) recycling the regenerated particulate heat carrier to the upflow reactor, wherein: (a) a second portion of calcium compound is added to the reheater, (b) the particulate heat carrier is different from the first and second portions of calcium compound, and (c) the amount of the first and second portions of calcium compound added is from about 0.2 to about 5 fold the stoichiometric amount of sulfur in the feedstock.