Alkoxyalkanoate Biofuel Cold Flow and Soot Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Biodiesel fuels face limitations in cold weather performance due to gelation and clogging issues, and existing bio-derived intermediates are unsuitable for high-volume production in mixing-controlled compression ignition (MCCI) engines, restricting their use in cold weather environments.
Innovation Solution
The chemical upgrading of hydroxyalkanoates, such as glycolic acid and 4-hydroxybutyrate, with fusel alcohols to produce C7-C22 alkoxyalkanoates, which exhibit improved properties like low cloud point, high cetane number, and reduced sooting, making them suitable for both autoignition and spark ignition engines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biodiesel is used as a renewable fuel, then greenhouse gas emissions are reduced and energy independence is improved, but cold flow performance deteriorates causing gelation and filter clogging in cold weather
Solution Approach 1:
The patent changes the chemical parameters of biodiesel by converting triglycerides into different ester types (fatty acid ethyl esters, fatty acid propyl esters, or fatty acid butyl esters) with varying chain lengths and molecular structures. This parameter change modifies the cold flow properties while maintaining the renewable fuel benefits, allowing the fuel to remain liquid at lower temperatures without gelation.
Solution Approach 2:
The patent creates composite ester formulations by combining different types of esters with specific chain lengths and molecular structures. These composite materials exhibit improved cold flow performance compared to conventional biodiesel, as the diverse molecular composition prevents crystallization and gelation in cold weather while maintaining combustion properties.
2Ease of manufacture
If conventional biodiesel production methods are used, then fuel can be produced from vegetable oils or animal fats, but the production yield and efficiency are limited
Solution Approach 1:
The patent employs a universal catalytic system that can process multiple feedstock types (vegetable oils, animal fats, and other lipid sources) through the same transesterification process. This multi-functional approach allows flexible production from various sources while maintaining high efficiency and yield, overcoming the limitations of conventional single-purpose production methods.
Solution Approach 2:
The patent optimizes production parameters including catalyst selection, reaction temperature, alcohol-to-oil ratio, and reaction time to maximize yield. By changing these parameters from conventional settings, the process achieves higher productivity and efficiency while maintaining ease of manufacture and compatibility with existing production infrastructure.
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 resulting alkoxyalkanoates demonstrate superior cold-weather performance, increased energy content, and reduced sooting, enabling broader use as renewable diesel fuels with potential yields exceeding ethanol from neat sugars, and can incorporate low-quality biomass hydrolysates.
Implementation Method 1
The compounds described herein may be used as neat fuels or mixed fuels (with diesel, biodiesel, marine fuel or other fuel compounds) in autoignition or spark ignition engines
Implementation Method 2
upgrading of hydroxyalkanoate (e.g., glycolic acid, lactic acid, and 4-hydroxybutyrate) with varying (fusel) alcohols was accomplished to provide a class of compounds
Data Source
AI summary
A chemical upgrading of two high-yield fermentation products to produce a novel biofuel with properties desirable for use in internal combustion engines produces a C7 to C22 alkoxyalkanoate corresponding to formula (I):wherein R2 and R1 are alkyl groups independently selected to have 2 to 18 carbon atoms;wherein the R3 group is a C1 to C5 group divalent alkyl group. The alkoxyalkanoate can be used as a neat fuel or blend with biodiesel, diesel, gasoline, ethanol or other fuels. The alkoxyalkanoates have improved cloud point properties over diesel fuels. A method for making the alkoxyalkanoate from a biomass source is also disclosed.