Malachite Powder Composite for Sulfur Capture
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Solution Overview
Problem
Copper hydroxycarbonate-based solids used for sulfur compound capture have low mechanical strength and attrition issues, leading to production challenges and reduced effectiveness in industrial applications.
Innovation Solution
A process involving mixing malachite powders of different particle sizes with a binder, followed by peptization and extrusion, to create solids with improved mechanical resistance and porosity, enhancing sulfur capture capacity and mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If copper hydroxycarbonate solids are used for sulfur compound capture, then sulfur capture performance is improved, but mechanical strength deteriorates
Solution Approach 1:
The patent applies composite materials by combining malachite powder with a binder material to form a composite solid. This composite structure maintains the sulfur capture performance of malachite while the binder provides mechanical strength, resolving the contradiction between chemical effectiveness and structural integrity.
Solution Approach 2:
The patent changes physical parameters by controlling particle size distribution (using a mixture of fine and coarse malachite particles) and binder content (5-20% by weight). These parameter adjustments optimize both the sulfur capture surface area and the mechanical strength of the final product.
2Quantity of substance
If malachite powder is used without binder, then sulfur capture capacity is maximized, but mechanical resistance deteriorates
Solution Approach 1:
The patent optimizes the binder content parameter within 5-20% by weight of malachite powder. This controlled addition of binder maintains most of the sulfur capture capacity while providing sufficient mechanical resistance for industrial application.
3Length of moving object
If basic peptization is applied to malachite, then particle size reduction is achieved, but solubilization effect is lost
Solution Approach 1:
Instead of using basic peptization as conventionally applied to zinc oxide, the patent uses acidic peptization appropriate for malachite's basic nature. This inversion of the peptization approach enables actual solubilization and particle size reduction for malachite, unlike the ineffective basic peptization approach.
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 resulting solids exhibit increased mechanical strength and sulfur capture performance, addressing the limitations of previous materials by maximizing useful mass capacity and reducing dispersion during sulfur capture.
Implementation Method 1
the basic peptization of ZnO allows partial dissolution of ZnO in a basic medium, which leads to a reduction in particle size
Implementation Method 2
partial dissolution of ZnO in a basic medium
Implementation Method 3
The preparation process includes the steps of mixing ZnO powders, peptization and calcination
Implementation Method 4
The solid undergoes a heat treatment, which partially degrades the copper hydroxycarbonate to obtain CuO, at a temperature above 260°C
Implementation Method 5
Copper compounds are known to the state of the art for their ability to react with sulfur compounds
Data Source
Figure 1
AI summary
The invention relates to a process for preparing a solid comprising a step of mixing an assembly comprising at least two Cu2(OH)2CO3 powders of different particle sizes and at least one binder and the use of the solid prepared by this process.