Liquid Hydrogen Storage Material Melting Point Control
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Solution Overview
Problem
Existing hydrogen storage materials with high melting points become solid during dehydrogenation, leading to difficulties in dehydrogenation reactions due to solid coagula formation on catalyst surfaces, which interrupts the reaction process.
Innovation Solution
A hydrogen storage material in liquid form is developed, comprising at least two different hydrogen storage components with low-melting-point unsaturated aromatic hydrocarbons or heterocyclic compounds, along with dehydrogenation and hydrogenation additives, such as petroleum ether and polar solvents, to maintain a liquid state and enhance reversible hydrogenation/dehydrogenation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If existing hydrogen storage materials with high melting points are used, then hydrogen storage capacity is achieved, but the materials become solid during dehydrogenation causing reaction interruption
Solution Approach 1:
The patent changes the physical state parameter of the hydrogen storage material from solid to liquid by selecting components with melting points below 80°C. This parameter change ensures the material remains in liquid state during dehydrogenation, preventing catalyst surface coagulation and maintaining continuous reaction progress while preserving hydrogen storage capacity.
Solution Approach 2:
The patent uses composite materials by combining multiple hydrogen storage components (such as unsaturated aromatic hydrocarbons and heterocyclic compounds) with complementary properties. This composite approach allows the system to achieve both adequate hydrogen storage capacity and low melting point characteristics, resolving the contradiction between storage capacity and operational continuity.
2Productivity
If hydrogen storage material is kept in liquid state, then dehydrogenation efficiency is improved, but melting point control becomes challenging
Solution Approach 1:
The patent systematically controls the melting point parameter by selecting hydrogen storage components with melting points below 80°C and adjusting their proportions. This parameter control ensures the material remains liquid at operating temperatures, maximizing dehydrogenation efficiency while managing composition complexity through defined selection criteria.
3Temperature
If low-melting-point components are used, then liquid state is maintained, but hydrogen storage capacity may be reduced
Solution Approach 1:
The patent employs composite materials combining multiple hydrogen storage components with different properties. By selecting components with melting points below 80°C and appropriate hydrogen storage capacities, and optimizing their ratios, the system achieves both low melting point (liquid state) and adequate hydrogen storage capacity simultaneously.
Solution Approach 2:
The patent applies local quality by assigning different functional roles to different components in the mixture. Some components primarily contribute to low melting point characteristics while others provide hydrogen storage capacity, and their combined effect resolves the contradiction between temperature control and storage capacity.
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 material maintains a liquid state at room temperature, preventing solid coagula formation and improving dehydrogenation efficiency, thus addressing the challenge of difficult dehydrogenation in existing hydrogen storage materials.
Implementation Method 1
an ideal hydrogen storage material should have a relatively good reversible hydrogenation/dehydrogenation performance
Implementation Method 2
in a dehydrogenation process, the hydrogen storage material recovered after being preferentially dehydrogenated
Implementation Method 3
at least one of the hydrogen storage component is a low-melting-point compound whose melting point is lower than 80 DEG C
Data Source
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AI summary
A hydrogen storage material in liquid form is provided. The liquid hydrogen storage comprises at least two different hydrogen storage components, each one of the components is selected from an unsaturated aromatic hydrocarbon or a heterocyclic unsaturated compound, and at least one of the hydrogen storage components is a low-melting-point compound whose melting point is lower than 80 DEG C. The material is multicomponent mixed liquid viscous heterocyclic aromatic hydrocarbons. A eutectic point of the material is at least lower than the melting point of a certain component. Thus, the eutectic point of the hydrogen storage material can be decreased to around the room temperature, which makes the hydrogen storage material in a liquid state around the room temperature.