Overview
ISO 10307-2:2009 defines standardized procedures for determining total sediment in residual fuel oils through accelerated ageing methods. It complements ISO 10307-1, which covers sediment determination by hot filtration. By specifying two accelerated ageing procedures-thermal (Procedure A) and chemical (Procedure B)-this International Standard allows petroleum industry professionals to predict the stability of residual fuel oils during storage and handling. The presence and quantity of sediment are critical indicators of fuel quality, affecting operational reliability in storage tanks, pipelines, and combustion systems.
Key Topics
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Accelerated Ageing Procedures
- Procedure A (Thermal Ageing): Samples are aged at 100 °C for 24 hours under controlled conditions to simulate long-term sediment formation.
- Procedure B (Chemical Ageing): Samples are diluted with hexadecane (normal alkane) and aged at 100 °C for 1 hour. This chemically disturbs the balance of asphaltenes leading to sediment precipitation.
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Sediment Determination Method
Following ageing, sediment determination is performed using hot filtration per ISO 10307-1. Both procedures are carried out in duplicate to ensure data reliability.
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Equipment and Reagents
Standardized lab apparatus includes an ageing bath with precise temperature control, air condensers, magnetic stirrers, and specialized glassware complying with ISO laboratory standards. Hexadecane of ≥99% purity is used in chemical ageing.
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Result Reporting
Sediment content is calculated as a mass percentage with accuracy to 0.01%, detailing whether results correspond to potential sediment (thermal ageing) or accelerated sediment (chemical ageing). Reports include test conditions, specimen identification, and any procedural deviations.
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Safety Considerations
Users must adhere to safety protocols due to handling of hazardous materials at high temperatures and potential chemical exposure during testing.
Applications
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Fuel Quality Control
ISO 10307-2 allows fuel storage and quality assurance labs to predict the sedimentation behavior of residual fuel oils, helping to prevent operational issues caused by sediment deposits.
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Fuel Formulation and Stability Assessment
Petroleum producers and blenders can evaluate fuel formulations for long-term stability, ensuring compliance with industry specifications and reducing downtime caused by sludge formation.
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Storage and Handling Risk Management
Facilities can assess the likelihood of sediment precipitation over time, allowing better maintenance scheduling and reducing risks associated with filter clogging and equipment fouling.
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Regulatory and Contract Compliance
Standardized sediment testing supports compliance with contractual fuel quality requirements and regulatory standards, promoting harmonized practices across international markets.
Related Standards
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ISO 10307-1:2009 - Petroleum products - Total sediment in residual fuel oils - Part 1: Determination by hot filtration
The complementary method specifying the sediment filtration technique post-ageing.
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ISO 1773:1997 - Laboratory glassware - Narrow-necked boiling flasks
Provides specifications for glassware used during sediment ageing procedures.
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ISO 31-0 - Quantities and units - Part 0: General principles
Defines correct notation for mass and volume fractions, relevant for reporting sediment concentration.
Keywords: ISO 10307-2, residual fuel oils, total sediment, accelerated ageing, thermal ageing, chemical ageing, sediment determination, fuel oil stability, petroleum products standard, fuel storage, sediment filtration, petroleum fuel quality, hexadecane testing, hot filtration method.