Hydrocarbon Decomposition for Hydrogen Release
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current hydrogen storage methods for automotive applications face challenges such as high energy penalties, safety concerns, and low volumetric densities, particularly with high-pressure gas containers and cryogenically cooled liquid hydrogen, while alternative methods like chemical hydrides and on-board reforming face drawbacks like high energy costs and instability.
Innovation Solution
A process using electromagnetic radiation to facilitate hydrogen release from stable hydrocarbons, such as paraffin waxes, in the presence of a catalyst, offering a safe and efficient hydrogen storage and production method suitable for vehicular applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high-pressure gas containers are used for hydrogen storage, then hydrogen storage capacity is improved, but energy penalty increases and safety concerns worsen
Solution Approach 1:
The invention changes the physical state of hydrogen from compressed gas to solid-phase storage in metal hydrides, operating at low pressure and temperature. This parameter change eliminates the need for high-pressure compression (reducing energy penalty) while maintaining high storage capacity through the solid-state hydrogen absorption properties of metal hydrides.
Solution Approach 2:
Metal hydrides serve as an intermediary material that facilitates hydrogen storage without requiring high-pressure compression. The metal hydride absorbs and releases hydrogen reversibly, acting as a mediator between the hydrogen source and the storage system, thereby reducing the energy penalty associated with direct compression while maintaining safety.
2Quantity of substance
If cryogenically cooled liquid hydrogen is used, then hydrogen storage density is improved, but energy penalty increases and safety concerns worsen
Solution Approach 1:
The invention changes the operating temperature from cryogenic conditions (liquid hydrogen) to ambient or near-ambient temperatures (solid-phase metal hydride storage). This parameter change eliminates the need for continuous cryogenic cooling while achieving comparable or superior storage densities through the high hydrogen content of metal hydride materials.
3Quantity of substance
If transition metal hydrides are used for hydrogen storage, then volumetric hydrogen density is improved, but gravimetric hydrogen density worsens
Solution Approach 1:
The invention applies local quality by selecting specific metal hydride materials with optimized hydrogen content and weight characteristics for different application requirements. By tailoring the composition and structure of the metal hydride, the system achieves high volumetric density in regions where space is constrained while managing overall system weight through material selection.
4Quantity of substance
If complex hydrides are used for hydrogen storage, then volumetric and gravimetric storage densities are improved, but operating temperature requirements and safety issues worsen
Solution Approach 1:
The invention uses metal hydrides as intermediary materials that provide safe and stable hydrogen storage. These materials offer reversible hydrogen absorption and release mechanisms that operate under controlled conditions, eliminating the safety issues associated with complex hydrides while maintaining high storage densities. The metal hydride acts as a buffer that ensures reliable and safe operation.
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 safe, efficient, and cost-effective means of hydrogen storage and production, overcoming the limitations of existing technologies by utilizing stable hydrocarbons to achieve high volumetric and gravimetric hydrogen densities with reduced energy penalties.
Implementation Method 1
The process employs electromagnetic radiation to facilitate the release of hydrogen from the hydrocarbon when in contact with a suitable catalyst
Implementation Method 2
The process employs electromagnetic radiation to facilitate the release of hydrogen from the hydrocarbon when in contact with a suitable catalyst
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention provides a process for producing hydrogen, which process comprises exposing a composition to electromagnetic radiation, which composition comprises at least one organic compound and a catalyst, wherein the at least one organic compound is selected from: hydrocarbons and compounds which comprise a hydrocarbyl group, and the catalyst comprises: a metal in elemental form; a metal compound other than a metal oxide; a non- metal in elemental form selected from B, C, Si, P, Ge, As, Sb and Te; or an inorganic compound of said non-metal other than an oxide of the non-metal. Compositions as defined above are also provided, as are uses of the compositions as hydrogen storage materials or for generating hydrogen. An electromagnetic activation system suitable for the rapid production of hydrogen from hydrocarbons is also provided, which system comprises: a reactor comprising a reaction cavity, which reactor is configured to receive, in the reaction cavity, a composition to be decomposed, and is configured to deliver hydrogen; and a source of electromagnetic radiation, suitable for exposing a composition in the reaction cavity to electromagnetic radiation and thereby effecting decomposition of the composition to produce hydrogen. Further provided is the use of electromagnetic activation system of the invention as defined above for generating hydrogen from a composition of the invention as defined above. A system for generating hydrogen is also provided, comprising (a) a composition of the invention; and (b) a source of electromagnetic radiation, for exposing the composition to electromagnetic radiation and thereby effecting decomposition of the at least one organic compound to produce hydrogen.