Sulfur-Resistant Reactor Components for High-Temperature Durability
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Solution Overview
Problem
Existing reactors and reactor components suffer from durability issues when operating at temperatures equal to or higher than 300°C in environments containing sulfur or sulfide, which is a challenge for manufacturing materials like positive electrode active materials and solid electrolytes for solid-state lithium-ion batteries.
Innovation Solution
The reactor components are made of alloys with specific compositions, including Fe-Cr-Ni-Co alloys, and optionally coated with ceramic or metal films, to enhance durability and resistance to sulfur and sulfide environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional reactor components are used at temperatures equal to or higher than 300°C in sulfur-containing environments, then production efficiency is maintained, but durability declines rapidly
Solution Approach 1:
The patent employs composite material structures including Fe-Cr-Ni-Co alloys with specific compositional ranges (Cr: 13-35%, Ni+Co: 0-35%) combined with protective coating films. This composite approach creates a multi-layered defense system where the alloy base provides structural integrity and the coating film provides enhanced corrosion resistance against sulfur and sulfide environments at high temperatures.
Solution Approach 2:
The invention systematically varies alloy composition parameters within specific ranges to optimize durability. By controlling Cr content at 13-35%, Ni+Co content at 0-35%, and applying coating films, the patent creates material parameters that resist sulfur corrosion while maintaining mechanical properties at temperatures ≥300°C.
2Reliability
If alloy composition is optimized for sulfur resistance, then durability improves, but manufacturing complexity increases
Solution Approach 1:
The patent defines specific compositional parameter ranges (Cr: 13-35%, Ni+Co: 0-35%) that balance durability requirements with manufacturing feasibility. These parameter specifications provide clear manufacturing targets while ensuring the resulting alloys achieve the necessary sulfur resistance at high temperatures.
Solution Approach 2:
By combining Fe-Cr-Ni-Co alloys with coating films, the patent creates a composite structure where each component has optimized functions. The alloy provides base strength and moderate corrosion resistance, while the coating film adds enhanced protection, allowing each material to be manufactured separately and then combined.
Data Source
AI summary
A reactor component according to an embodiment is used in a reactor that reacts a material to be treated in an environment where at least one of the material to be treated and an atmosphere contains sulfur or sulfide and is constituted of an alloy of which a principal component is Fe, which contains 13 to 35 percent by mass of Cr, and which contains a total of 0 to 35 percent by mass of Ni and Co.