Shift Feed Gas Saturator Heat Integration
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Solution Overview
Problem
There is a need for a process to efficiently adjust the hydrogen content of syngas to produce fuel and chemical products while minimizing downtime and capital costs, and to vary production efficiently between different products.
Innovation Solution
The process involves converting a portion of carbon monoxide in syngas to carbon dioxide, shifting the syngas, and using heat integration and condensate treatment to adjust the hydrogen to carbon monoxide ratio, with heat transfer from shifted syngas to condensed water for vaporization and saturation, allowing for flexible production by splitting and processing the syngas in multiple stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional syngas processing methods are used to adjust hydrogen content, then product flexibility is achieved, but process complexity and capital costs increase
Solution Approach 1:
The water-gas shift reactor is designed to perform multiple functions: adjusting hydrogen content, controlling syngas composition, and adapting to different product requirements. This single unit replaces what would traditionally require multiple specialized processing lines, thereby achieving product flexibility while reducing overall process complexity
Solution Approach 2:
The invention adjusts process parameters (temperature, pressure, catalyst type, water-to-gas ratio) within the water-gas shift reactor to achieve different hydrogen content targets. By changing operational parameters rather than physical configuration, the system maintains flexibility across multiple products without requiring complex infrastructure changes
2Manufacturing precision
If conventional saturation processes are used to condition syngas, then water vapor content is controlled, but energy efficiency decreases
Solution Approach 1:
The syngas is pre-saturated with water vapor before entering the water-gas shift reactor. This preliminary saturation ensures optimal conditions for the shift reaction while eliminating the need for post-reaction saturation steps, thereby maintaining precise water vapor control while reducing overall energy consumption
Solution Approach 2:
The saturation function is merged with the reaction conditioning process. Rather than treating saturation as a separate energy-intensive step, the invention combines it with the pre-treatment of syngas, achieving water vapor control as part of the reaction preparation rather than as an additional process stage
3Quantity of substance
If syngas is cooled for condensate separation, then condensate recovery is achieved, but heat loss increases
Solution Approach 1:
The invention utilizes controlled phase transition of water vapor to liquid condensate within the water-gas shift system. By managing this phase change as an integral part of the reaction process rather than a separate cooling step, the system recovers condensate while minimizing heat loss through integrated thermal management
Solution Approach 2:
The water-gas shift reaction itself generates the conditions for condensate formation and separation. The exothermic nature of the reaction provides the thermal environment needed for condensate recovery, making the system self-sufficient in managing its own moisture balance without requiring external cooling energy input
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 enables efficient adjustment of syngas composition, improving heat recovery and reducing capital costs by allowing for flexible production of various products with minimal downtime, while optimizing the hydrogen to carbon monoxide ratio and utilizing condensate vaporization for efficient heat management.
Implementation Method 1
Heat from the shifted syngas can be at least partially transferred from the shifted syngas to the condensed water to at least partially vaporize the condensed water
Implementation Method 2
Heat from the shifted syngas can be at least partially transferred from the shifted syngas to the condensed water to at least partially vaporize the condensed water
Data Source
AI summary
Systems and processes for adjusting hydrogen content of a synthesis gas are provided. At least a portion of carbon monoxide in a syngas can be converted to carbon dioxide to provide a shifted syngas and condensed water. The syngas can have a first hydrogen to carbon monoxide ratio and a first temperature, and the shifted syngas can have a second hydrogen to carbon monoxide ratio and a second temperature, both greater than the first. Heat from the shifted syngas can be at least partially transferred from the shifted syngas to the condensed water to at least partially vaporize the condensed water. The syngas can be at least partially saturated with the at least partially vaporized condensed water. A ratio of the water vapor to syngas can be about 1.0 or less.