Dioxolane Biodiesel Fuel from Lignocellulosic Biomass

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Solution Overview

Problem

Conventional biodiesel fuels produced from food sources or tropical oils are limited in industrial scale production and have higher viscosity, lower combustion efficiency, and increased biofouling and corrosion risks compared to petroleum-based diesel fuels.

Innovation Solution

Biodiesel fuel is produced from lignocellulosic biomass using a dioxolane compound with one to three alkyl groups, synthesized by reacting alkyl ketones with diols or polyols in the presence of an acid catalyst, with water removal and subsequent purification to achieve a fuel with improved cetane numbers and reduced emissions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If conventional biodiesel fuels are produced from food sources or tropical oils, then biodiesel fuel can be produced, but the viscosity is higher, combustion efficiency is lower, and biofouling and corrosion risks increase

Engineering Contradiction:

Improvebiodiesel fuel productionVSAvoidcombustion efficiency and corrosion resistance

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent changes the chemical composition parameters of biodiesel fuel by producing dioxolane compounds with specific molecular structures (one to three alkyl groups, total carbons ≤24) from lignocellulosic biomass. This parameter change results in lower viscosity and higher cetane numbers (40-100), directly resolving the contradiction between ease of manufacture and combustion efficiency.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses lignocellulosic biomass (agricultural residues, forestry waste, municipal solid waste) as feedstock instead of valuable food sources or tropical oils. This disposable, low-cost material approach enables scalable production while achieving superior fuel properties, resolving the contradiction between manufacturing ease and fuel reliability.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Ease of manufacture

If conventional biodiesel fuels are produced from food sources or tropical oils, then biodiesel fuel can be produced, but the viscosity is higher compared to petroleum-based diesel fuels

Engineering Contradiction:

Improvebiodiesel fuel productionVSAvoidviscosity

Core Design Contradiction:

Ease of manufactureVSShape

Solution Approach 1:

The patent achieves lower viscosity by changing the molecular structure parameters of the biodiesel fuel. The dioxolane compounds with controlled carbon numbers (≤24) and specific alkyl group configurations produce fuel with viscosity characteristics closer to petroleum diesel, resolving the contradiction between ease of manufacture and viscosity control.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If lignocellulosic biomass is used to produce biodiesel fuel, then increased cetane numbers and reduced emissions are achieved, but the production process complexity increases

Engineering Contradiction:

Improvecombustion efficiency and emissionsVSAvoidproduction process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the production process into distinct stages: pretreatment of lignocellulosic biomass, conversion to dioxolane compounds through chemical reactions, and purification steps. This segmentation allows each stage to be optimized independently, managing process complexity while achieving high cetane numbers (40-100) and reduced emissions.

Inventive Principle:

Principle #1Segmentation

4Ease of manufacture

If conventional biodiesel fuels are produced from food sources or tropical oils, then biodiesel fuel can be produced, but industrial scale production is limited

Engineering Contradiction:

Improvebiodiesel fuel productionVSAvoidindustrial scale production

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent uses abundant, low-cost lignocellulosic biomass (agricultural residues, forestry waste, municipal solid waste) as feedstock instead of limited food sources or tropical oils. This enables scalable industrial production by utilizing disposable, renewable materials that are not constrained by food supply or geographic limitations, directly resolving the contradiction between ease of manufacture and productivity.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 biodiesel fuel from lignocellulosic biomass offers increased cetane numbers, reduced emissions, and improved combustion efficiency, addressing the limitations of conventional biodiesel fuels and enabling significant replacement of petroleum-based diesel fuel.

Implementation Method 1

synthesized by reacting alkyl ketones with diols or polyols in the presence of an acid catalyst

Methodology Applied

Scientific EffectChemical reaction: Chemical Bonding

Implementation Method 2

with water removal and subsequent purification

Methodology Applied

Scientific EffectEvaporation: Evaporation

Data Source

PatentUS11220645B1Renewable high cetane dioxolane fuels

Publication Date: 2022.01.11 THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY

AI summary

A biodiesel fuel consisting of a dioxolane with one to three alkyl groups, a (CH2)nCH3 alkyl group where n ranges from 6 to 14, and the dioxolane has a total number of carbons that is equal to or less than 24 carbons.