What are the properties of crude oil?
What are the properties of crude oil?
Crude oil is a mixture of comparatively volatile liquid hydrocarbons (compounds composed mainly of hydrogen and carbon), though it also contains some nitrogen, sulfur, and oxygen. Those elements form a large variety of complex molecular structures, some of which cannot be readily identified.
What makes an oil heavy or light?
The higher the number, the lighter the oil; any liquid with an API gravity higher than 10 is lighter than water. Crude oil with an API gravity less than 30 is considered “heavy”, and oil with an API gravity greater than 30 is “light”. Most grades have an API gravity between 10 and 70.
What physical property is used in the processing of crude oil?
The physical characteristics of crude oil determine how refineries process it. In simple terms, crude oils are classified by density (API gravity) and sulfur content. Less dense (lighter) crude oils (with higher API gravity) generally have a larger share of light hydrocarbons.
What makes crude oil heavy?
It is “heavy” (dense and viscous) due to the high ratio of aromatics and naphthenes to linear alkanes and high levels of NSOs (nitrogen, sulfur, oxygen and heavy metals). Heavy oil has a higher percentage of compounds with over 60 carbon atoms and hence a high boiling point and molecular weight.
Which crude oil is best?
For example, West Texas Intermediate (WTI) is some of the best in the world and certainly the best crude oil produced on a large scale. The difference in crude oil types, meaning the difference in crude oil qualities, means that there is also a difference in the prices of different crude oils.
What is the classification of crude oil?
Due to the importance of this energy source, a vast market, which includes physical trading, as well as derivatives trading, exists for crude oil. Crude is classified, based on density, as light, medium, heavy, or extra heavy. It can also be classified, based on sulfur content, into a sour and sweet category.
Where is sweet crude oil found?
Major locations where sweet crude is found include the Appalachian Basin in Eastern North America, Western Texas, the Bakken Formation of North Dakota and Saskatchewan, the North Sea of Europe, North Africa, Australia, and the Far East including Indonesia.
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Is natural gas used in oil refining?
Refinery products such as fuel gas, fuel oil, naphtha and diesel are used to satisfy the fuel and power requirement of the steam cracker and aromatics complex. Natural gas can be utilised as fuel for an integrated refinery-cum-petrochemicals complex while maintaining flexible product objectives.
What are the five basic refining processes?
The basic five refining processes are:
- separate (by distillation or absorption)
- crack (breaking large chains of molecules into smaller ones)
- reshape (rearranging of molecular structure)
- combine (combining smaller molecules to make larger ones)
- treat (chemical removal of contaminants)
Where is heavy crude oil found?
Most heavy oil is found at the margins of geologic basins and is thought to be the residue of formerly light oil that has lost its light-molecular-weight components through degradation by bacteria, water-washing, and evaporation.
Where is the best crude oil found?
The best crude oil in the world is found in Malaysia. “Tapis, the Malaysian crude benchmark traded in Singapore, has for a long time held the title of the world’s most expensive grade.
What makes a crude oil light or heavy?
Crude’s classification as either “light” or “ heavy” depends on the oil’s relative density, based on the American Petroleum Institute (API) Gravity. This measurement reflects how light or heavy a crude oil is compared to water. If an oil’s API Gravity is greater than 10, it is lighter than water and will float on it.
What are the physical properties of crude oil?
Physical and Chemical Properties of Crude Oil and Oil Products 1- Density, Specific Gravity, and API Gravity Density is defined as mass per unit volume of a fluid. Density is a state function and for a pure compound depends on both temperature and pressure and is shown by ρ.
How are crude oils graded according to gravity?
Crude oils are often graded by their API gravity: Light crude oil: °API > 31.5° Intermediate crude oil: 22.1° ≤ °API ≤ 31.5° Heavy crude oil: °API < 22.1o
How are the different types of crude oil classified?
The petroleum industry often names crude based on the oil’s geographical source, for example, “West Texas Intermediate.” Crude oil is also classified based on physical characteristics and chemical composition, and these qualities are described with terms such as “sweet,” “sour,” “light,” and “heavy.”
Crude’s classification as either “light” or “ heavy” depends on the oil’s relative density, based on the American Petroleum Institute (API) Gravity. This measurement reflects how light or heavy a crude oil is compared to water. If an oil’s API Gravity is greater than 10, it is lighter than water and will float on it.
How is crude oil classified according to gravity?
Crude is classified by both physical and chemical characteristics. Crude oil is referred to as either light, medium, or heavy, based on its density. The American Petroleum Institute gravity, commonly shortened to API gravity, compares the density of crude to water.
The petroleum industry often names crude based on the oil’s geographical source, for example, “West Texas Intermediate.” Crude oil is also classified based on physical characteristics and chemical composition, and these qualities are described with terms such as “sweet,” “sour,” “light,” and “heavy.”
How is the density of crude oil determined?
Crude oil is referred to as either light, medium, or heavy, based on its density. The American Petroleum Institute gravity, commonly shortened to API gravity, compares the density of crude to water. An API gravity higher than 10 means the oil is less dense than water and will float on it.
