Composite Adsorbent for High-Capacity Dry Desulfurization
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Solution Overview
Problem
Existing dry process desulfurization technologies face challenges with low sulfur removal rates and limited sulfur breakthrough capacity, leading to increased sorbent dosages, capital costs, and complex operation processes.
Innovation Solution
A composite material comprising activated carbon, alkali metal oxides, silicon oxides, iron oxides, and rare earth element oxides, with specific weight ratios and processing steps, is developed to enhance desulfurization rates and breakthrough capacities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If ordinary activated carbon is used for dry process desulfurization, then the operation is simple and equipment investment is small, but the sulfur removal rate is low and sulfur breakthrough capacity is limited
Solution Approach 1:
The patent applies composite materials by combining activated carbon with metal oxides (such as copper oxide, zinc oxide, calcium oxide) to create a composite adsorbent. This composite structure integrates the high sulfur affinity of activated carbon with the catalytic properties of metal oxides, achieving both high sulfur removal rates and maintained operational simplicity.
Solution Approach 2:
The patent modifies the chemical and physical parameters of activated carbon through surface treatment and composite formation. By changing the surface chemistry and pore structure parameters, the adsorbent achieves enhanced sulfur capture capacity while maintaining the simplicity of the dry process operation.
2Productivity
If sorbent dosage is increased to improve sulfur breakthrough capacity, then sulfur removal efficiency improves, but capital costs and device complexity increase
Solution Approach 1:
The patent changes the chemical composition parameters of the sorbent by incorporating metal oxides into the activated carbon matrix. This parameter modification increases the sulfur breakthrough capacity per unit mass, allowing reduced sorbent dosage while maintaining high removal efficiency and avoiding increased system complexity.
3Productivity
If activated carbon is modified to increase adsorption rate and sulfur capacity, then desulfurization performance improves, but manufacturing complexity increases
Solution Approach 1:
The patent creates composite materials by impregnating activated carbon with metal oxide solutions or through co-precipitation methods. These manufacturing approaches, while requiring additional steps, use conventional chemical processing techniques that balance improved adsorption performance with manageable manufacturing complexity.
Solution Approach 2:
The patent utilizes and enhances the porous structure of activated carbon by creating hierarchical pore systems and surface modifications. This approach maintains the ease of manufacturing activated carbon itself while adding functional layers that improve adsorption rate and capacity through controlled surface treatment.
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 composite material achieves high saturated sulfur capacity and sulfur breakthrough capacity, ensuring desirable adsorbability and regeneration properties, thus promoting a clean and efficient dry process desulfurization technique.
Implementation Method 1
The adsorption of SO2 by activated carbons is affected by the surface properties such as morphology, distribution of the pore size. The ordinary activated carbons have a small capacity of sulfur adsorption, a low desulfurization rate and a poor accuracy
Implementation Method 2
The provided catalyst is consisting of carrier activated carbon and an active ingredient metal oxide mixture, wherein the metal oxide mixture is the mixture of copper oxide, iron oxide, aluminum oxide, nickel oxide, manganese oxide, cobalt oxide and zinc oxide
Data Source
AI summary
A composite material is used for desulfurization. The composite material contains activated carbon, alkali metal oxides, silicon oxides, iron oxides, and rare earth element oxides. The weight ratio among the activated carbon, iron oxides and rare earth element oxides is 100:(0.5-5):(1-10). The composite material, used as a sulfur adsorbent, has a higher sulfur breakthrough capacity and desulfurization rate.