【Weekly Topic】How is the sulfur in catalytic feedstocks distributed in the products?
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This post was last edited by fengdingwen on 2011-2-11 at 17:30. The weekly topic discussion sessions in the refining area welcome active participation from everyone, and we hope that you will come up with more valuable topics. Based on the sulfur balance of their own installations, everyone should discuss how the sulfur in the catalytic feedstock is distributed in the products, including in regenerated flue gas, sulfur-containing wastewater, etc
Reply 1# fengdingwen: 1. SOx content in the recycled flue gas: 50–200 mg/m3. 2. Sulfide content in the sulfur-containing wastewater from the oil-gas separator at the top of the fractionation tower: 2613 mg/l. 3. Sulfide content in the sulfur-containing wastewater from the oil-gas separator before the absorption tower: 3044 mg/l. 4. H2S content in the dry gas: 0.8 v%. 5. H2S content in liquid hydrocarbons: 200 ppm. 6. Sulfur content in stabilized gasoline: 140 ppm
Reply 1# fengdingwen: 1. Sulfur content of the mixed feedstock (57.5% straight-run wax oil, 30% hydrogenated wax oil, 12.5% vacuum residue and reduced tetra-line oil): 0.51%. 2. Sulfur content of the oil slurry: 0.74%. 3. Sulfur content of light diesel: 0.56%
This is a set of sulfur balance data for catalytic cracking of hydrotreated distillate oils: Serial Number, Process Stream Name, Production Volume, Sulfur Content %, Sulfur Weight in tons, Percentage of Sulfur in Feedstock %. 1. Feed paraffin oil: 1889, 0.11%, 2.0779 tons, 100.00%. 2. Outlet dry gas: 109.37, 41.29 mg/m3, 0.5487%, 26.41%. Liquefied gas: 613.92, 51.7562 mg/m3, 0.0540%, 2.60%. Gasoline: 701.00, 79.0127 mg/m3, 0.0890%, 4.28%. Diesel: 340.96, 45.0194 mg/m3, 0.6628%, 31.90%. Oil slurry: 0, 0.0000%, 0.00%. Coke: 117.10, 0.2940%, 0.3443%, 16.57%. Sulfur-containing wastewater: 3141, 174 mg/l, 0.3686%, 17.74%. Losses: 6.6, 0.0104%, 0.50%. Generally, the sulfur content in gasoline is between 5-7% of the sulfur content in the feedstock, with lower values ranging from 3-5%.
Initially, when processing high-sulfur crude oil, there was concern that sulfur might end up in the flue gas; however, little sulfur was found in the flue gas – it all ended up in the dry gas and liquid hydrocarbons!
The distribution of petroleum products generally shows a trend of being high at both ends and low in the middle; dry gas and liquefied gas have high sulfur content, as do coke and oil slurry, while intermediate products such as gasoline and diesel have relatively lower sulfur content
How much sulfur is in your flue gas?
The sulfur dioxide content in flue gas is generally 400-500PPM
Will the sulfur content in the slurry be higher than that in the feedstock, in the case where no sulfur is lost from the slurry?