Desulfurization Catalyst Composite Structure for Stability
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Solution Overview
Problem
Current desulfurization catalysts face challenges in achieving high stability and abrasion resistance, leading to reduced service life and increased operational costs, while also struggling to maintain the octane number of gasoline during the desulfurization process.
Innovation Solution
A desulfurization catalyst comprising a sulfur-storing metal oxide, an inorganic binder, a wear-resistant component like hexagonal boron nitride, and an active metal component, along with an optional acidic porous material, which is formulated to provide enhanced stability and desulfurization activity, and is produced through a method involving calcination and reduction steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional desulfurization catalysts are used, then desulfurization function is provided, but stability and abrasion resistance are insufficient leading to reduced service life
Solution Approach 1:
The patent employs a composite catalyst structure consisting of sulfur-storing metal oxide particles (0.5-2.0 mm diameter) embedded in a porous ceramic body. This composite design combines the high desulfurization activity of metal oxides (zinc oxide, calcium oxide, magnesium oxide, or their mixtures) with the mechanical strength and stability of the ceramic support, achieving both improved stability and extended service life while maintaining effective desulfurization function.
2Object-generated harmful factors
If conventional desulfurization catalysts are used, then sulfur removal is achieved, but abrasion resistance is poor leading to increased operational costs
Solution Approach 1:
The patent employs a composite catalyst structure consisting of sulfur-storing metal oxide particles (0.5-2.0 mm diameter) embedded in a porous ceramic body. This composite design combines the high desulfurization activity of metal oxides (zinc oxide, calcium oxide, magnesium oxide, or their mixtures) with the mechanical strength and stability of the ceramic support, achieving both improved stability and extended service life while maintaining effective desulfurization function.
3Object-generated harmful factors
If desulfurization is performed, then sulfur content is reduced, but octane number of gasoline is not maintained
Solution Approach 1:
The patent utilizes the natural pore size distribution and surface chemistry variations within the porous ceramic body to create different functional zones. The porous structure provides localized environments that favor desulfurization reactions while preserving hydrocarbon quality, enabling selective sulfur removal without adversely affecting the octane number of gasoline.
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 catalyst exhibits improved stability and desulfurization activity, reducing sulfur content in hydrocarbon oils effectively, prolonging catalyst life, and maintaining the octane number of gasoline, thus lowering operational costs and improving process efficiency.
Implementation Method 1
a sulfur-storing metal oxide, wherein the sulfur-storing metal is one or more selected from the group consisting of a metal of Group IIB of the periodic table, a metal of Group VB of the periodic table, and a metal of Group VIB of the periodic table
Implementation Method 2
an active metal component that is one or more selected from the group consisting of a metal element of Group VIII of the periodic table, an oxide of an iron group element of the periodic table, a metal element of Group IB of the periodic table, an oxide of a metal element of Group IB of the periodic table, a metal element of Group VIIB of the periodic table and an oxide of a metal element of Group VIIB of the periodic table
Data Source
AI summary
A desulfurization catalyst includes at least: 1) a sulfur-storing metal oxide, 2) an inorganic binder, 3) a wear-resistant component, and 4) an active metal component. The sulfur-storing metal is one or more of a metal of Group IIB of the periodic table, a metal of Group VB of the periodic table, and a metal of Group VIB of the periodic table, e.g., zinc. The desulfurization catalyst has a good stability and a high desulfurization activity.