Cetane-Boosting Fuel Additive Synthesis via Catalytic Reaction

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Solution Overview

Problem

There is a need for improved cetane-boosting compositions and cost-effective methods for producing them, as well as diesel fuel compositions that can enhance the cetane number while maintaining thermal stability and meeting regulatory requirements, particularly in reducing NOx and particulate emissions.

Innovation Solution

A method involving the reaction of formaldehyde and 2-ethylhexanol in the presence of a heterogeneous acid catalyst, such as a sulfonated polystyrene cation exchange resin, to produce cetane-boosting fuel additives with high oxygen content and solubility, which are then added to diesel fuel to increase the cetane number and improve combustion efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If EHN is used as a cetane-boosting additive, then the cetane number is improved, but the thermal stability deteriorates

Engineering Contradiction:

Improvecetane numberVSAvoidthermal stability

Core Design Contradiction:

Measurement precisionVSStability of the object's composition

Solution Approach 1:

The patent changes the chemical structure parameters of the cetane-boosting additive by using di-tert-butyl peroxide instead of EHN. This structural substitution maintains the cetane-boosting function while eliminating the thermal instability problem associated with EHN's chemical structure.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs di-tert-butyl peroxide as a consumable additive that performs its cetane-boosting function and then decomposes harmlessly, unlike EHN which causes ongoing thermal stability issues. The additive is designed to be effective for its intended purpose and then degrade without causing harm.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Stability of the object's composition

If DTBP is used as a cetane-boosting additive, then the thermal stability is improved, but the nitrogen content requirement may not be met

Engineering Contradiction:

Improvethermal stabilityVSAvoidnitrogen emissions

Core Design Contradiction:

Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

The patent converts the potential disadvantage of DTBP (lacking nitrogen) into a benefit by demonstrating that DTBP's nitrogen-free composition actually helps meet reformulated diesel fuel regulatory requirements regarding nitrogen content and emissions, while still achieving effective cetane boosting.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Productivity

If the reaction temperature is increased to improve reaction rate, then the productivity is improved, but the energy consumption increases

Engineering Contradiction:

Improvereaction rateVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent replaces thermal energy input with a catalytic mechanism to drive the reaction. By using a solid acid catalyst, the reaction proceeds at lower temperatures through catalytic action rather than relying solely on thermal activation, thus maintaining productivity while reducing energy consumption.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the reaction conditions by introducing a catalyst, which alters the activation energy parameter and allows the reaction to proceed efficiently at lower temperatures, thereby reducing energy consumption while maintaining or improving productivity.

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The cetane-boosting fuel additives effectively raise the cetane number of diesel fuel, reducing combustion noise and smoke, enhancing engine starting in cold climates, and meeting environmental regulations by improving fuel stability and emission reduction.

Implementation Method 1

reacting formaldehyde and 2-ethylhexanol in the presence of a heterogeneous acid catalyst to produce a cetane-boosting product mixture

Methodology Applied

Scientific EffectCatalysis: Catalysis

Data Source

PatentEP3645677B1Cetane-boosting fuel additives, method of manufacture, and uses thereof

Publication Date: 2021.05.19 SABIC GLOBAL TECHNOLOGIES BV

AI summary

A method of manufacturing a cetane-boosting fuel additive includes reacting formaldehyde and 2-ethylhexanol at a mole ratio of 10:1 to 1:1, or 5:1 to 1.5:1, or 4:1 to 2:1, or 3.5:1 to 2.5:1 in the presence of a heterogeneous acid catalyst at a temperature of 300 to 375 °K to obtain a cetane-boosting product mixture comprising H3C(CH2)3CH(CH2CH3)CH2(OCH2)nOH, H3C(CH2)3CH(CH2CH3)CH2(OCH2)nOCH2CH(CH2CH3)(CH2)3CH3, or a combination thereof, wherein n has an average value of 2.8 to 3.2, preferably an average value of 3.