Moisture-Resistant Desulfurizing Agent Using Mixed-Metal MOF
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing desulfurizing agents, such as metal-organic frameworks like HKUST-1, are prone to structural degradation due to moisture, leading to decreased adsorption performance when exposed to fluids containing moisture and sulfur compounds.
Innovation Solution
A desulfurizing agent comprising metal ions (aluminum, iron, or copper) and organic ligands, including isophthalic acid with optional substituents, forms sacrificial bonds to withstand moisture, maintaining structural integrity and adsorption capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If metal-organic framework (HKUST-1) is used as a desulfurizing agent, then sulfur compound removal capability is improved, but structural stability deteriorates due to moisture susceptibility
Solution Approach 1:
The patent changes the chemical composition parameters of the metal-organic framework by substituting part of the copper ions with aluminum or iron ions. This compositional parameter change enhances structural stability against moisture while preserving the sulfur compound adsorption capability through the remaining copper ion sites.
Solution Approach 2:
The patent creates a composite metal-organic framework combining multiple metal ions (Cu, Al, Fe) within the same structure. This composite approach leverages the high sulfur affinity of copper ions while utilizing the moisture resistance of aluminum and iron ions, achieving both improved stability and maintained desulfurization performance.
2Ease of manufacture
If copper ions are used instead of silver ions in the desulfurizing agent, then material cost is reduced, but adsorption performance may deteriorate
Solution Approach 1:
The patent applies local quality by distributing copper ions selectively within the metal-organic framework structure to create localized high-affinity sites for sulfur compounds. Even with partial substitution by cheaper aluminum or iron ions, the copper-rich local regions maintain effective adsorption performance while reducing overall material cost.
Solution Approach 2:
The patent optimizes the concentration parameter of copper ions in the composite framework, maintaining sufficient copper content to ensure adsorption performance while incorporating cost-effective aluminum and iron ions. This parameter optimization achieves a balance between performance and manufacturing cost.
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 agent effectively removes sulfur compounds from fluids containing moisture, maintaining high adsorption performance and reducing material costs by using copper ions, which are less expensive than silver.
Implementation Method 1
an organic ligand coordinating to the metal ion
Implementation Method 2
a desulfurizing agent for removing a sulfur compound from a fluid
Data Source
Figure 1~2
Figure 3A~3B
Figure 4~6
AI summary
A desulfurizing agent of the present disclosure is a desulfurizing agent for removing a sulfur compound from a fluid including moisture and the sulfur compound, the desulfurizing agent including: at least one kind of metal ions selected from the group consisting of an aluminum ion, an iron ion, and a copper ion; and an organic ligand coordinating to the metal ion, wherein the organic ligand includes isophthalic acid having optionally a substituent at a 5-position of a benzene ring, and in an X-ray diffraction pattern of the desulfurizing agent measured using Cu-Kα radiation, a diffraction peak is present in each of a diffraction angle range of 10.9° ± 0.3° and a diffraction angle range of 18.1° ± 0.3°.