Hydrogen Origin Certification via Stable Isotope Ratios
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Solution Overview
Problem
Current methods for certifying the origin of hydrogen-based flows lack transparency and reliability, as green and low-carbon dihydrogen molecules are indistinguishable from gray dihydrogen molecules, making it difficult to determine the environmental value and origin of hydrogen in the hydrogen trading market.
Innovation Solution
A method involving the measurement of stable isotope ratios in initial and reagent flows, conversion into hydrogen derivatives, and the use of unique identifiers to create identification information based on partition coefficients, allowing for reliable certification of hydrogen origin through isotope mapping without altering the hydrogen quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If digital certification methods are used to track green hydrogen, then traceability is improved, but transparency and reliability are insufficient
Solution Approach 1:
The patent changes the parameter being measured from general digital tracking to specific stable isotope ratios. By measuring the ratio of stable isotopes (e.g., deuterium/hydrogen ratio) in the hydrogen molecules, the system creates a unique physical fingerprint that reliably indicates the origin and production method of the hydrogen, thereby improving both traceability and certification reliability
Solution Approach 2:
The patent replaces the mechanical/digital certification system with an analytical chemistry approach. Instead of relying on digital certificates and audit trails, the system uses mass spectrometry or other analytical methods to directly measure isotope ratios, providing objective, scientifically-based evidence of hydrogen origin that is difficult to falsify
2Loss of information
If additional tracers are added to hydrogen flow for tracking, then origin determination is improved, but hydrogen quality is degraded
Solution Approach 1:
The patent extracts the tracking function from the hydrogen molecule itself by measuring intrinsic stable isotope ratios that already exist in the feedstock materials. No external tracers are added; instead, the natural isotopic composition of water (for green hydrogen) or natural gas (for gray hydrogen) serves as the unique identifier, preserving hydrogen quality while enabling origin determination
Solution Approach 2:
The patent uses stable isotope ratios as an intermediary between the hydrogen production process and the certification system. The isotope ratios act as a natural mediator that carries information about the origin without requiring additional substances to be added to the hydrogen flow, thus maintaining purity while enabling traceability
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 method provides a secure and reliable way to authenticate the origin of hydrogen-based flows, ensuring traceability and maintaining the quality of hydrogen, suitable for applications like fuel cells without the need for additional tracers.
Implementation Method 1
measuring, in samples of the initial flow and of the reagent flow, ratios of stable isotopes of at least one element, to obtain feedstock isotope ratios
Implementation Method 2
generating, notably by water electrolysis or natural gas reforming, a flow of dihydrogen from an initial flow
Implementation Method 3
generating, notably by water electrolysis or natural gas reforming, a flow of dihydrogen from an initial flow
Implementation Method 4
converting said flow of dihydrogen into a produced hydrogen-based flow by chemical reaction with a reacting agent from a reagent flow
Data Source
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AI summary
The invention relates to a method (100) for certifying origin of a purchased hydrogen-based flow, comprising the following steps: - generating a flow of dihydrogen (23) from an initial flow (22) ; - converting said flow of dihydrogen (23) into a produced hydrogen-based flow (25) by chemical reaction with a reacting agent from a reagent flow (24), said produced hydrogen-based flow (25) comprising H2 derivatives. The method comprises the following preliminary steps of: - measuring, in samples of the initial flow (22) and of the reagent flow (23), ratios of stable isotopes of at least one element, to obtain feedstock isotope ratios ; - associating each feedstock isotope ratio with a unique identifier to form identification information. The method further comprises a preliminary step of acquiring partition coefficients specific to the generating step and to the converting step.