Fischer-Tropsch Hydroformylation Fuel Process
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Solution Overview
Problem
Existing methods for producing diesel fuels using Fischer-Tropsch synthesis and hydroformylation primarily focus on producing alcohols or alcohol mixtures that are not suitable as fuels, lacking improved emission characteristics for internal combustion engines.
Innovation Solution
A process combining Fischer-Tropsch synthesis and hydroformylation to produce diesel fuels with specific alkanols, optimizing catalysts and reaction conditions to achieve a fuel composition with improved energy density and emission characteristics, including a method to produce alkanols with 6 to 11 carbon atoms and hydrocarbons, which are suitable for internal combustion engines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If Fischer-Tropsch synthesis and hydroformylation are used to produce alcohol-based fuels, then harmful emissions can be reduced, but the energy density is lower than that of gasoline
Solution Approach 1:
The patent changes the chain length parameter of the alcohol molecules from short-chain (C2-C4) to medium-chain (C6-C11) through optimized Fischer-Tropsch synthesis and hydroformylation conditions. This parameter change increases the energy density while maintaining the emission reduction benefits of alcohol-based fuels.
Solution Approach 2:
The patent produces a composite fuel composition containing a mixture of linear and branched alkanols with specific chain lengths (C6-C11), combining the benefits of different alcohol structures to achieve both low emissions and high energy density in a single fuel blend.
2Object-affected harmful factors
If ethanol from renewable resources is used to reduce emissions, then harmful emissions can be reduced, but the plants required compete with food crops
Solution Approach 1:
The patent extracts the fuel production process from competing food crops by using Fischer-Tropsch synthesis that can utilize synthesis gas from various non-food sources (natural gas, coal, biomass gasification), thereby separating fuel production from food production while maintaining renewable resource utilization.
3Use of energy by moving object
If primary alkanols of medium chain length are used in diesel fuels, then energy density and combustion properties are improved, but the production process becomes more complex
Solution Approach 1:
The patent merges the Fischer-Tropsch synthesis step with the hydroformylation step into an integrated two-step process. The olefin products from Fischer-Tropsch are directly fed into the hydroformylation reactor without extensive intermediate separation, simplifying the overall production process while maintaining the ability to produce medium-chain alkanols with improved energy density.
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 process efficiently produces diesel fuels with enhanced emission characteristics, such as reduced soot emissions and improved energy density, by integrating Fischer-Tropsch synthesis and hydroformylation, achieving a fuel composition that is suitable for internal combustion engines.
Implementation Method 1
Reaction of carbon monoxide and hydrogen in the presence of a first catalyst to form a first product mixture containing hydrocarbons and olefins
Implementation Method 2
Reaction of at least one part of the first product mixture containing olefins with 5 to 10 carbon atoms with hydrogen and carbon monoxide and/or carbon dioxide in the presence of a second catalyst to form an alkanol fuel
Data Source
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AI summary
The present invention relates to a process for producing a fuel for internal combustion engines which combines a Fischer-Tropsch synthesis and a hydroformylation. The invention likewise relates to a fuel obtainable by the process and to the use of a substance mixture as a fuel for internal combustion engines. The product mixture from the Fischer-Tropsch synthesis has a proportion of olefins having 5 to 10 carbon atoms of ≥ 10% by weight to ≤ 45% by weight. After the hydroformylation/reduction a fuel for internal combustion engines containing alkanols having 6 to 11 carbon atoms is obtained.