Technical Study on the Factors Contributing to Octane Number Reduction in Gasoline

his technical study investigates the key factors contributing to the reduction of octane number in gasoline, with a focus on both production-related and post-production influences. The octane number is a critical parameter that determines fuel quality, combustion efficiency, and engine performance. Any decline in octane rating not only impacts vehicle operation but also raises concerns related to emissions compliance and fuel marketability.

The study examines multiple factors, including:

Feedstock quality variations (aromatics, olefins, paraffins composition).

Process unit performance in catalytic reforming, isomerization, and hydrotreating.

Catalyst deactivation due to coke deposition, poisoning, or aging.

Blending strategy and component imbalance during gasoline pool preparation.

Storage and handling issues, such as evaporation losses, contamination, and oxidation stability.

The analysis also reviews operational case studies and explores mitigation strategies, such as optimized catalyst regeneration, feed pretreatment, and improved blending practices, to maintain high-octane gasoline quality and ensure compliance with international fuel specifications.