Sub-Product
- Main Product
- Fuel Gas
- Segment
- Refined Products
- Main-Family
- Refinery Gases
- Sub-Family
- Fuel gases & Lighter hydroc.
- Physical State
-
Gas
- Sub-Product
- Refinery Off-Gas
- Abbreviation
- ROG
- Description
-
Refinery Off-Gas refers to the mixture of gases generated during the refining of crude oil. It is a by-product of various refinery processes, such as hydrotreating, catalytic reforming, and fluid catalytic cracking. The composition of refinery off-gas varies depending on the crude oil processed and the specific refining operations, but it typically includes components like methane, ethane, ethylene, hydrogen, butanes, butylenes, and other hydrocarbons[1].
The following table shows a typical ROG composition[2]:
Component Vol% Hydrogen, H₂
Methane, CH4
Ethane, C2H6
Propane, C3H8
i-Butane, C4H10
n-Butane, C4H10
i-Pentane, C5H12
n-Pentane, C5H12
Hexanes, C6H140.7464
0.1604
0.0524
0.0202
0.0038
0.0043
0.003
0.004
0Refinery off-gas can serve multiple purposes[1]:
- When combusted within the refinery, it is classified as refinery fuel gas (RFG). This usage helps meet energy needs for process heaters and boilers.
- It can be used as feedstock in steam reforming of methane (SMR) units to produce hydrogen for hydrotreatment processes.
- Off-gas processing units can recover valuable products such as hydrogen, olefins (ethylene and propylene), and natural gas liquids (NGLs), adding economic value to refineries.
References
- Perplexity Search, 11th Mar 2025, Proompt: "Please provide a definition of refinery off-gas".
- Marcelo Tagliabue, Q1 2022, Refinery off-gas in hydrogen production, Digital Refining PTQ.
Identifiers
No Identifiers defined
Chemical Data
- Specific Gravity
- 0.60
Properties
- Default
- Status
- A
System Info
- Update by
-
Kokel, Nicolas
- Updated
- 3/11/2025 9:08 AM
- Added by
-
Kokel, Nicolas
- Added
- 3/11/2025 8:20 AM

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Title | Date | |
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3/11/2025 |