Multi-Biomethane Feedstock Allocation for Lower-Carbon Hydrogen Reforming
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Solution Overview
Problem
Existing methods for producing hydrogen using biomethane do not effectively reduce carbon intensity and may not qualify for carbon intensity-based incentives, despite the potential of biomethane to lower carbon emissions.
Innovation Solution
A method involving the use of at least two different biomethanes, each derived from distinct sources, feedstocks, and processes, with one biomethane used as feedstock and the other as fuel for methane reforming, allowing for a disproportionate distribution to optimize carbon intensity and meet regulatory thresholds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If hydrogen is produced using a single type of biomethane, then the production process is simple, but the carbon intensity reduction is insufficient and may not qualify for incentives
Solution Approach 1:
The patent segments the biomethane supply into multiple distinct batches (at least two batches from different sources, feedstocks, or processes) and strategically allocates them to different functional roles (feedstock vs. fuel). This segmentation enables differentiated carbon intensity management where low-carbon biomethane batches are directed to feedstock to maximize renewable hydrogen content, while high-carbon batches are directed to fuel to provide necessary heat without significantly impacting the overall carbon intensity of the produced hydrogen
Solution Approach 2:
The patent applies local quality by assigning different carbon intensity characteristics to different portions of the biomethane supply based on their intended use. Specifically, biomethane with lower carbon intensity is preferentially allocated to the feedstock stream where it directly contributes to hydrogen production, while biomethane with higher carbon intensity is allocated to the fuel stream where it provides thermal energy. This localized optimization ensures that the hydrogen produced from feedstock maintains low carbon intensity credentials for incentive qualification
2Object-affected harmful factors
If hydrogen is produced using green hydrogen methods (electrolysis), then the carbon intensity is near zero, but the production cost is high
Solution Approach 1:
The patent merges the advantages of biomethane reforming (lower cost compared to electrolysis) with strategic carbon intensity management through multi-batch allocation. By combining biomethane feedstock (providing renewable content) with biomethane fuel (providing process heat), the system achieves a cost-effective alternative to green hydrogen electrolysis while still attaining low carbon intensity levels that can qualify for incentives through optimized batch distribution
3Ease of manufacture
If hydrogen is produced using biomethane reforming, then the production cost is lower, but the carbon intensity may not be low enough to qualify for incentives
Solution Approach 1:
The patent implements dynamic allocation of biomethane batches to feedstock and fuel streams based on varying carbon intensity characteristics, availability, and market conditions. The system can adjust the proportion of different biomethane batches assigned to each function in real-time, allowing optimization of both cost and carbon intensity performance. This dynamic management enables the system to maintain low carbon intensity credentials for incentive qualification while preserving the cost advantages of biomethane reforming
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 enhances the carbon intensity of produced hydrogen, making it eligible for incentives and reducing greenhouse gas emissions, while maintaining efficiency in hydrogen production.
Implementation Method 1
subjecting feedstock to methane reforming to produce syngas
Implementation Method 2
combusting fuel for producing heat for the methane reforming
Data Source
AI summary
A method of producing hydrogen that uses at least two batches of biomethane, where at least two of the biomethanes are from different sources, are produced from different feedstocks, are produced from different processes, and/or have different carbon intensities. The at least two batches of biomethane are distributed such that at least a portion of the first batch distributed to the feedstock, at least a portion of the second batch distributed to the fuel, and such that at least one of the biomethanes is distributed disproportionally between feedstock and fuel and/or such that biomethane in the feedstock has a different fractional make-up than biomethane in the fuel.