Fuel Ignition Property Adjustment Apparatus
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Solution Overview
Problem
Existing methods for setting the ignition properties of liquid fuels require external energy introduction, leading to inefficiencies and limitations in heat transfer, making it difficult to adapt fuel properties for various applications, especially in reducing pollutants and improving combustion efficiency in internal combustion engines.
Innovation Solution
A process and apparatus with a dispersion zone, oxidation zone, and conversion zone, where fuel is dispersed, partially oxidized by an oxidant over a catalyst, and then thermally or catalytically converted, allowing the ignition properties to be set through the molar ratio of oxygen, pressure, residence time, and temperature, enabling efficient vaporization and conversion of fuels without external energy input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If external energy is introduced to set ignition properties of liquid fuels, then the ignition properties can be adjusted, but energy efficiency decreases and heat transfer limitations occur
Solution Approach 1:
The system uses the fuel itself as the energy source for vaporization and conversion. The exothermic oxidation reactions of the fuel provide the heat required for vaporizing liquid fuel and driving catalytic/thermal conversion, eliminating the need for external energy input and achieving self-sufficient operation
Solution Approach 2:
The patent combines vaporization, oxidation, and conversion zones into a single integrated system where multiple processes occur simultaneously. The oxidation zone generates heat that is immediately utilized in the vaporization and conversion zones, merging energy generation and consumption into one cohesive system
2Object-generated harmful factors
If complex exhaust gas treatment systems are used to reduce pollutants, then pollutant emissions decrease, but device complexity and cost increase
Solution Approach 1:
The system performs preliminary conversion of the fuel before combustion, adjusting ignition properties and pre-processing the fuel in the vaporization and conversion zones. This preliminary action prepares the fuel for more efficient and cleaner combustion, reducing pollutants at the source rather than treating them afterward
Solution Approach 2:
The system converts the potential harm of incomplete combustion and pollutant formation into beneficial outcomes by using catalytic and thermal conversion to pre-process the fuel. The controlled oxidation and conversion reactions transform the fuel into a state that burns more cleanly, turning what would be harmful emissions into a benefit
3Adaptability or versatility
If liquid fuels are used in gas engines without modification, then fuel versatility improves, but combustion efficiency and ignition control deteriorate
Solution Approach 1:
The system changes the physical and chemical parameters of liquid fuel through vaporization and catalytic/thermal conversion. By controlling temperature, pressure, and residence time in the conversion zone, the fuel's ignition properties are modified to match the requirements of gas engines, enabling efficient combustion of liquid fuels in engines designed for gaseous fuel
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
This approach allows for dynamic adjustment of ignition delay time and temperature, reducing pollutant emissions and improving combustion efficiency, enabling the use of fuels in gas engines and turbines without modifications, and enhancing thermal efficiency while minimizing the need for complex exhaust gas treatment systems.
Implementation Method 1
The oxidation reactions likewise provide the heat for vaporization of liquid fuels. Furthermore, the heat is utilized for catalytically and/or thermally converting the fuel.
Implementation Method 2
The heat for the thermal and/or catalytic reactions is provided by an oxidation of an introduced oxidant with part of the introduced fuel over a catalyst.
Implementation Method 3
The oxidation reactions likewise provide the heat for vaporization of liquid fuels.
Implementation Method 4
The heat for the thermal and/or catalytic reactions is provided by an oxidation of an introduced oxidant with part of the introduced fuel over a catalyst.
Data Source
AI summary
The ignition characteristics of a fuel are adjusted using a unit which has a distribution zone, a oxidation zone and a conversion zone. Fuel is distributed in the distribution zone having a distribution structure. A portion of the fuel is oxidised in the oxidation zone with a oxidising agent on a catalyst on a catalyst carrier, and a portion of the distributed fuel and/or of another supplied fuel is thermally and/or catalytically converted in the conversion zone. The ignition characteristics of the fuel are adjusted via: the molar ratio of oxygen included in the oxidising agent to the oxygen required for the complete oxidation of the fuel provided; and/or via the pressure in the unit; and/or the dwell time; and/or the temperature. Exhaust emissions, in particular NOx and soot emissions, can be lowered.