Biomass Gasification Hydrogen Supply Control
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Solution Overview
Problem
The existing fuel production systems using biomass as a raw material often face inefficiencies in adjusting the H2/CO ratio of synthesis gas, leading to hydrogen deficiency and increased carbon dioxide generation, which affects the overall energy efficiency and production costs.
Innovation Solution
A fuel production system that includes a gasification furnace, a hydrogen supply device, and a controller to adjust the hydrogen supply location and amount based on temperature, allowing hydrogen to be supplied either to the raw material supply area or the synthesis gas discharge area, optimizing the H2/CO ratio and reducing carbon dioxide generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If hydrogen is supplied to the gasification furnace to adjust H2/CO ratio, then the hydrogen deficiency is improved, but the proportion of hydrogen consumed in byproduct generation increases under certain operating conditions
Solution Approach 1:
The controller predicts the H2/CO ratio before the synthesis gas is actually produced, based on the current operating conditions of the gasification furnace. This preliminary prediction allows hydrogen supply to be optimized in advance, preventing hydrogen deficiency while avoiding excessive hydrogen consumption in byproduct generation.
Solution Approach 2:
The system uses feedback control where the controller continuously monitors the actual H2/CO ratio and compares it with the target ratio. Based on this feedback, the controller adjusts the hydrogen supply amount dynamically, ensuring the H2/CO ratio is maintained at optimal levels while minimizing hydrogen loss to byproducts.
2Ease of operation
If fixed hydrogen supply location is used, then the system operation is simplified, but the production efficiency of different fuels cannot be optimized under varying operating conditions
Solution Approach 1:
The system dynamically switches the hydrogen supply location between the gasification furnace and the synthesis gas stream based on the predicted H2/CO ratio and target ratio. This dynamic adjustment allows the system to optimize fuel production efficiency under varying operating conditions while maintaining operational simplicity through automated control.
Solution Approach 2:
The controller changes the hydrogen supply location parameter based on operating conditions. When the predicted H2/CO ratio is lower than the target ratio, hydrogen is supplied to the gasification furnace; when it is higher, hydrogen is supplied to the synthesis gas stream, optimizing efficiency across different operational states.
3Quantity of substance
If hydrogen supply amount is increased to ensure target H2/CO ratio, then the hydrogen deficiency is prevented, but the carbon dioxide generation increases
Solution Approach 1:
The controller predicts the H2/CO ratio in advance and calculates the precise hydrogen supply amount needed to achieve the target ratio. This preliminary calculation prevents over-supply of hydrogen that would lead to excessive carbon dioxide generation, while still ensuring the target H2/CO ratio is met.
Solution Approach 2:
The system adjusts the hydrogen supply amount parameter based on the difference between predicted and target H2/CO ratios. By precisely controlling this parameter, the system achieves the desired H2/CO ratio while minimizing carbon dioxide generation from excess hydrogen supply.
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 synthesis gas composition, suppresses carbon dioxide production, and enhances fuel production efficiency by strategically switching hydrogen supply locations within the system, thereby improving energy efficiency and reducing processing costs.
Implementation Method 1
a gasifying step of gasifying a biomass raw material subjected to a predetermined pretreatment together with water and oxygen in a gasification furnace to generate a synthesis gas containing hydrogen and carbon monoxide
Implementation Method 2
an electrolyzer which generates hydrogen from water by way of electrical power generated using a renewable energy
Data Source
AI summary
A fuel production system and a fuel production method are provided which can efficiently perform adjusting of a synthesis gas composition by hydrogen supply, while suppressing the generated amount of carbon dioxide by a system overall. A fuel production system includes: a gasification furnace which gasifies a biomass raw material to generate a synthesis gas containing hydrogen and carbon monoxide; a liquid fuel production device which produces a liquid fuel from the synthesis gas generated by the gasification furnace; a hydrogen supply pump which supplies hydrogen to a raw material supply area or a synthesis gas discharge area; a temperature sensor which detects a temperature of the gasification furnace; and a controller which switches a hydrogen supply location by the hydrogen supply pump between the raw material supply area and synthesis gas discharge area, based on the temperature detected by the temperature sensor.