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Petroleum Refinery 
Basics 
• Crude Oil components 
• Refinery Flowchart 
• Other refinery units 
• Unit Opns & Unit Proces in refining 
• Physical and process Hazards 
 
 
 
Page 2


Petroleum Refinery 
Basics 
• Crude Oil components 
• Refinery Flowchart 
• Other refinery units 
• Unit Opns & Unit Proces in refining 
• Physical and process Hazards 
 
 
 
Petroleum is extracted from underground reserves; 
then it is cracked or “refined” into end products for 
various uses. The petroleum industry thus has two 
parts: an oil exploration and production industry 
upstream and a refinery industry downstream. 
Most oil producers also own refineries. But the 
reverse is not true; a high proportion of oil is sold 
to refinery companies that do not produce crude 
oil. 
Page 3


Petroleum Refinery 
Basics 
• Crude Oil components 
• Refinery Flowchart 
• Other refinery units 
• Unit Opns & Unit Proces in refining 
• Physical and process Hazards 
 
 
 
Petroleum is extracted from underground reserves; 
then it is cracked or “refined” into end products for 
various uses. The petroleum industry thus has two 
parts: an oil exploration and production industry 
upstream and a refinery industry downstream. 
Most oil producers also own refineries. But the 
reverse is not true; a high proportion of oil is sold 
to refinery companies that do not produce crude 
oil. 
Refining Means. . . 
1. To reduce to a pure state, to remove 
impurities 
 
2. To improve or perfect 
 
   Salable products are made from crude. 
Page 4


Petroleum Refinery 
Basics 
• Crude Oil components 
• Refinery Flowchart 
• Other refinery units 
• Unit Opns & Unit Proces in refining 
• Physical and process Hazards 
 
 
 
Petroleum is extracted from underground reserves; 
then it is cracked or “refined” into end products for 
various uses. The petroleum industry thus has two 
parts: an oil exploration and production industry 
upstream and a refinery industry downstream. 
Most oil producers also own refineries. But the 
reverse is not true; a high proportion of oil is sold 
to refinery companies that do not produce crude 
oil. 
Refining Means. . . 
1. To reduce to a pure state, to remove 
impurities 
 
2. To improve or perfect 
 
   Salable products are made from crude. 
What is Crude Oil? 
• Mixture of organic 
carbon chain 
molecules 
• Impurities include 
sulfur and nitrogen 
compounds 
• Some metals and 
salts too 
 
 
 
Page 5


Petroleum Refinery 
Basics 
• Crude Oil components 
• Refinery Flowchart 
• Other refinery units 
• Unit Opns & Unit Proces in refining 
• Physical and process Hazards 
 
 
 
Petroleum is extracted from underground reserves; 
then it is cracked or “refined” into end products for 
various uses. The petroleum industry thus has two 
parts: an oil exploration and production industry 
upstream and a refinery industry downstream. 
Most oil producers also own refineries. But the 
reverse is not true; a high proportion of oil is sold 
to refinery companies that do not produce crude 
oil. 
Refining Means. . . 
1. To reduce to a pure state, to remove 
impurities 
 
2. To improve or perfect 
 
   Salable products are made from crude. 
What is Crude Oil? 
• Mixture of organic 
carbon chain 
molecules 
• Impurities include 
sulfur and nitrogen 
compounds 
• Some metals and 
salts too 
 
 
 
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FAQs on PPT - Petroleum Refinery Basics - Chemical Technology - Chemical Engineering

1. What is a petroleum refinery?
Ans. A petroleum refinery is an industrial facility that processes crude oil into various valuable products such as gasoline, diesel, jet fuel, and other petrochemicals. It involves a series of chemical processes, including distillation, cracking, and reforming, to separate and transform the crude oil into different components.
2. How does distillation play a role in petroleum refining?
Ans. Distillation is a crucial process in petroleum refining. It involves heating the crude oil in a distillation column to separate it into various fractions based on their boiling points. The lighter fractions, such as gasoline and LPG, vaporize and rise to the top, while the heavier fractions, like diesel and residual fuel oil, remain at the bottom. This separation enables the production of different petroleum products.
3. What is cracking in petroleum refining?
Ans. Cracking is a process used in petroleum refining to break down complex hydrocarbon molecules into smaller, more valuable molecules. It is done through the application of heat and catalysts, which cause the molecular bonds to break. Cracking helps to convert heavy hydrocarbons into lighter ones, such as gasoline and propylene, which are in high demand.
4. What is the significance of reforming in petroleum refining?
Ans. Reforming is an essential process in petroleum refining that enhances the octane rating of gasoline. It involves rearranging the hydrocarbon molecules to create branched and cyclic compounds, which have higher octane numbers. This process increases the performance and efficiency of gasoline, making it suitable for modern combustion engines.
5. How does a petroleum refinery contribute to the production of petrochemicals?
Ans. Petrochemicals are chemical compounds derived from petroleum resources. Petroleum refineries play a crucial role in producing petrochemicals by refining crude oil and utilizing specific processes like cracking and reforming. These processes generate intermediate products, such as ethylene and propylene, which are the building blocks for various petrochemicals used in manufacturing plastics, rubber, fibers, and other industrial materials.
69 videos|121 docs
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