Biomass Gasification With H2/CO Ratio Control for Liquid Fuel
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Solution Overview
Problem
Existing methods for producing liquid fuels from biomass struggle to control the H2/CO ratio effectively, leading to suboptimal yield and energy efficiency in the production process.
Innovation Solution
A method involving a gasification step, electrolysis step, and control step to manage the mass ratios of biomass, steam, and hydrogen, ensuring the H2/CO ratio after gasification reaches two or higher, using formulae H/B≤-0.031×S/B+0.079 and H/B≥-0.028×S/B+0.056, to enhance carbon monoxide production and improve yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If hydrogen is supplied to increase carbon monoxide production, then the amount of carbon monoxide increases, but the H2/CO ratio control becomes more difficult
Solution Approach 1:
The patent implements a control step that monitors the H2/CO ratio and adjusts hydrogen supply accordingly. The control unit receives information about the H2/CO ratio from measurement devices and adjusts the hydrogen supply rate to maintain the ratio within the target range of 2.0 or higher, resolving the contradiction between increasing CO production and maintaining ratio control precision.
Solution Approach 2:
The patent changes the operating parameters by establishing specific relationships between hydrogen supply rate, steam supply rate, and biomass feed rate. By controlling the hydrogen supply rate to be 0.056≤H/B≤0.079 and the steam supply rate to be 0.20≤S/B≤0.40, the system optimizes both carbon monoxide production and H2/CO ratio control simultaneously.
2Productivity
If the H2/CO ratio is controlled to be two or higher, then the yield of liquid fuel is maximized, but the process complexity increases
Solution Approach 1:
The control unit performs multiple functions: it monitors the H2/CO ratio, calculates required hydrogen supply rates, controls hydrogen valve openings, and coordinates with steam supply and biomass feeding. This multi-functional control system manages the complexity while ensuring the H2/CO ratio remains at 2.0 or higher to maximize liquid fuel yield.
3Quantity of substance
If hydrogen supply rate is increased, then carbon monoxide production increases, but energy efficiency may be compromised
Solution Approach 1:
The system dynamically adjusts the hydrogen supply rate based on real-time measurements of the H2/CO ratio and production requirements. Rather than using a fixed high hydrogen supply rate, the control unit continuously optimizes the hydrogen input to maintain the minimum required ratio of 2.0, thereby reducing unnecessary energy consumption while still maximizing carbon monoxide production for liquid fuel synthesis.
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 method increases carbon monoxide production and achieves improved quality control and energy efficiency in the liquid fuel production process.
Implementation Method 1
In the gasification step, the biomass is thermally decomposed, and a gas mixture containing hydrogen and carbon monoxide, carbon dioxide, methane or the like is generated.
Implementation Method 2
an electrolysis step of generating hydrogen from water with electric power generated using renewable energy
Data Source
AI summary
What is provided is a method for producing a liquid fuel in which it is possible to increase the amount of carbon monoxide by supplying hydrogen and define a supply ratio between hydrogen and steam so that the H2/CO ratio after gasification reaches two or higher. A method for producing a liquid fuel by which a liquid fuel is produced from a biomass raw material, the method having a gasification step of generating a synthesis gas from the biomass raw material, an electrolysis step of generating hydrogen from water with electric power generated using renewable energy, a liquid fuel production step of producing a liquid fuel using the synthesis gas generated by the gasification step and the hydrogen generated by the electrolysis step as raw materials, and a control step of controlling the gasification step and the electrolysis step, in which a mass of a biomass raw material (B), a mass of steam(S) and a mass of hydrogen (H) that are introduced into the liquid fuel production step satisfy the following formula (1) to formula (4).H/B≤-0.031×S/B+0.079(1)H/B≥-0.028×S/B+0.056(2)S/B≥0.5(3)H/B>0(4)