Fischer-Tropsch Integration with Steam Reforming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The high cost of implementing the Fischer-Tropsch process limits its use in small-scale units and integration with existing refinery units, particularly due to the expensive synthesis gas production step, necessitating a low-cost raw material solution for producing Fischer-Tropsch derivatives.
Innovation Solution
Integrating the Fischer-Tropsch process with existing hydrogen generation units by recycling streams from the steam-reforming hydrogen generation process, utilizing the purge gas as feedstock, which contains a high carbon dioxide content and lower hydrogen content, to produce liquid hydrocarbons such as gasoline and diesel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional synthesis gas production units are used for the Fischer-Tropsch process, then high-quality liquid hydrocarbons can be produced, but the fixed investment costs become excessively high
Solution Approach 1:
The patent merges the Fischer-Tropsch synthesis unit with existing hydrogen generation units in the refinery, combining two previously separate processes into one integrated system. The synthesis gas is produced within the hydrogen generation unit using steam-reforming of hydrocarbons, eliminating the need for a separate synthesis gas production unit and reducing overall fixed investment costs while maintaining product quality
Solution Approach 2:
The hydrogen generation unit is designed to serve dual functions: producing hydrogen for refinery operations and generating synthesis gas for the Fischer-Tropsch process. This multi-functionality allows the same equipment to support multiple processes, reducing the need for dedicated synthesis gas production infrastructure and lowering capital requirements
2Quantity of substance
If dedicated synthesis gas production units are implemented, then sufficient synthesis gas can be supplied for Fischer-Tropsch synthesis, but the process becomes economically unviable for small-scale operations
Solution Approach 1:
The hydrogen generation unit performs self-service by producing its own synthesis gas through steam-reforming of hydrocarbons within the same unit. The reforming section converts hydrocarbon feedstock into synthesis gas that is then utilized by the Fischer-Tropsch synthesis section, creating a self-sufficient system that eliminates the need for external synthesis gas production infrastructure and reduces economic barriers to small-scale implementation
3Device complexity
If existing hydrogen generation units are utilized for integrated Fischer-Tropsch production, then fixed investments are reduced, but the hydrogen generation unit must operate without alterations
Solution Approach 1:
The hydrogen generation unit is segmented into distinct functional sections: a reforming section for synthesis gas production and a Fischer-Tropsch synthesis section for liquid hydrocarbon production. This segmentation allows the unit to operate as an integrated system while maintaining the ability to independently control and optimize each section, preserving operational flexibility without requiring modifications to the existing hydrogen generation 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
This approach allows for the production of high-quality liquid hydrocarbons with reduced fixed investments, integrating the Fischer-Tropsch process into existing refinery units without altering existing hydrogen units, and avoids the need for dedicated synthesis gas production units, enabling efficient and economical small-scale production.
Implementation Method 1
streams arising from the steam-reforming hydrogen generation process
Implementation Method 2
catalytic hydrogenation of carbon monoxide (CO) to produce liquid hydrocarbons
Implementation Method 3
The Fischer-Tropsch synthesis reaction involves catalytic hydrogenation of carbon monoxide (CO) to produce liquid hydrocarbons
Data Source
AI summary
The present invention relates to a process for preparing liquid hydrocarbons by the Fischer-Tropsch process integrated into refineries, in particular comprising recycling streams from the steam reforming hydrogen production process as the feedstock for the Fischer-Tropsch process.