Unleaded Fuel Octane Rating via Aromatic Amines

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Solution Overview

Problem

The production of unleaded fuels with high octane ratings, particularly above 100, is challenging due to the difficulty in achieving and maintaining high Research Octane Number (RON) and Motor Octane Number (MON) values, which are essential for preventing knocking in high-performance and racing engines.

Innovation Solution

A unleaded fuel composition comprising 25 vol.% or more of alkylated benzenes with 1 to 4 carbon atoms, 5 vol.% or more of aromatic amines, and an isoparaffin composition selected from alkylate, a combination of isoparaffins with 11 or less carbon atoms, or their combinations, which enhances the octane rating to 105 or more.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional fuel composition methods are used, then fuel production is simpler, but octane rating cannot reach 105 or above

Engineering Contradiction:

Improveoctane ratingVSAvoidfuel production difficulty

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent changes the chemical composition parameters by incorporating aromatic amines (5-15 vol.%) and specific alkylated benzenes (25-40 vol.%) to achieve octane ratings of 105 or above, resolving the contradiction between manufacturing simplicity and high octane rating achievement

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite fuel formulation combining isoparaffins (40-50 vol.%), alkylated benzenes (25-40 vol.%), and aromatic amines (5-15 vol.%) to achieve synergistic effects that produce ultra-high octane ratings unattainable with conventional single-component fuels

Inventive Principle:

Principle #40Composite materials

2Reliability

If higher octane rating is achieved, then knocking prevention improves, but fuel production becomes more difficult

Engineering Contradiction:

Improveknocking preventionVSAvoidfuel production difficulty

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent modifies fuel composition parameters by adding aromatic amines and alkylated benzenes in specific proportions, achieving superior knocking prevention through elevated octane ratings while establishing a reproducible formulation process

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The aromatic amines act as intermediary compounds that enhance the octane rating of the base isoparaffin formulation, providing a mediator mechanism to achieve high reliability without requiring complete reformulation of the entire fuel system

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP2108032B1Unleaded fuel compositions

Publication Date: 2018.09.12 SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ BV

AI summary

An unleaded fuel composition comprising: a combination of alkylated benzenes comprising alkyl groups having from 1 to 4 carbon atoms; 5 vol.% or more of one or more aromatic amines; and, an isoparaffin composition selected from the group consisting of alkylate, a combination of isoparaffins having a total number of carbon atoms of 11 or less, and combinations thereof.