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Questions and Answers
What is the primary objective of visbreaking?
What is the primary objective of visbreaking?
- To increase the amount of light heating oil required
- To convert heavy ends to gas and distillates
- To reduce viscosity of the residue (correct)
- To produce gasoline with higher octane rating
What is the typical conversion percentage of heavy ends to gas, gasoline, and distillates in catalytically cracked products?
What is the typical conversion percentage of heavy ends to gas, gasoline, and distillates in catalytically cracked products?
- 5–8%
- 10–25% (correct)
- 30–40%
- 50–60%
What is the main cause of high pour point and viscosity for paraffinic base residue?
What is the main cause of high pour point and viscosity for paraffinic base residue?
- Presence of sulfur compounds
- Long paraffinic side chains attached to aromatic rings (correct)
- Excessive heat during refining process
- High levels of nitrogen content
In addition to reducing viscosity, what else can visbreaking be used for?
In addition to reducing viscosity, what else can visbreaking be used for?
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What does the visbreaking process favor in terms of the paraffinic side chains?
What does the visbreaking process favor in terms of the paraffinic side chains?
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