Removable Protective Coating for Dust-Free Catalyst Handling
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Solution Overview
Problem
Catalysts used in the chemical industry, such as those for producing maleic anhydride, suffer from significant dust formation due to abrasion and attrition, leading to exposure risks for personnel, equipment damage, and operational inefficiencies, particularly due to the presence of toxic materials like Cr(VI) and vanadyl pyrophosphate, which complicates handling and reactor performance.
Innovation Solution
A stabilized catalyst mould is created by applying a protective organic binder coating to the outer surface of the catalyst body, enhancing abrasion and attrition resistance, minimizing dust formation, and allowing easy removal without affecting the catalytically active material's performance or leaving residues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a catalyst mould is used for producing maleic anhydride, then catalytic performance is achieved, but dust formation occurs due to abrasion and attrition
Solution Approach 1:
A protective coating layer is applied to the surface of the catalyst mould, forming a thin film that prevents dust formation during handling while preserving the catalytic activity. The coating acts as a protective shell that reduces abrasion and attrition of the catalyst material.
Solution Approach 2:
The catalyst mould is created as a composite structure combining the catalytically active material with a binding agent or protective coating. This composite approach maintains the catalytic functionality while reducing dust formation through improved mechanical stability.
2Ease of operation
If catalyst moulds are mechanically stressed during handling, then catalyst loading and transportation are enabled, but heavy dust formation occurs due to abrasion and attrition
Solution Approach 1:
The protective coating on the catalyst mould surface acts as a flexible shell that withstands mechanical stress during handling, transportation, and loading operations without causing significant dust formation. The coating maintains integrity under compression and mechanical agitation.
Solution Approach 2:
The protective coating is applied beforehand to cushion the catalyst material against mechanical stress during subsequent handling operations. This pre-protection prevents dust formation during transportation and loading by absorbing mechanical energy before it reaches the catalyst particles.
3Object-affected harmful factors
If extensive personal protection equipment and vacuum systems are used, then exposure to catalyst dust is reduced, but handling costs and complexity increase
Solution Approach 1:
The harmful dust formation is extracted or eliminated at the source by applying the protective coating to the catalyst mould. This prevents dust generation during handling, thereby eliminating the need for extensive personal protection equipment and vacuum systems.
Solution Approach 2:
The protective coating converts the potentially harmful catalytic material into a dust-free form during handling. The same material that could cause exposure risks is transformed into a stable, coated structure that eliminates dust formation, turning a harmful property into a beneficial one.
4Productivity
If catalyst fines are present in reactor tubes, then catalyst loading is simplified, but pressure drop tolerance is exceeded requiring emptying and refilling
Solution Approach 1:
The protective coating on catalyst moulds prevents the generation of fines during loading, ensuring that catalyst particles maintain their integrity. This keeps pressure drop within tolerance ranges and eliminates the need to empty and refill reactor tubes.
Solution Approach 2:
The protective coating is applied preliminarily to the catalyst moulds before loading into the reactor. This pre-protection ensures that during the loading process, no fines are generated that would exceed pressure drop tolerance, thereby maintaining productivity without requiring subsequent reactor emptying.
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 solution significantly reduces dust formation during handling, improves catalyst durability, and maintains the catalytic performance and efficiency, while also simplifying reactor loading and reducing environmental exposure to toxic substances.
Implementation Method 1
an organic binder that has penetrated into the surface of a catalyst body made of catalyst material and that forms a protective layer together with the catalyst material present at the surface
Implementation Method 2
forms a protective layer together with the catalyst material present at the surface of the catalyst body to thereby stabilize the outer surface
Data Source
AI summary
The invention pertains to a stabilized catalyst mold comprising a catalyst body formed of a catalyst material, said catalyst material comprising a catalytically active material or a precursor material of the catalytically active material, characterized in that at least parts of the surface of the catalyst mold are provided with a protective coating comprising an organic binder. Further, the invention pertains to a method for obtaining a stabilized catalyst mold.