Lanthanide Oxide Coated Catalysts for Sintering Prevention
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Solution Overview
Problem
Catalysts used in high-temperature chemical reactions, such as syngas production and methane reforming, undergo sintering, leading to reduced surface area and effectiveness, with existing solutions increasing costs and complicating processes by requiring additional catalyst supply or increased initial amounts.
Innovation Solution
The use of lanthanide oxides, specifically coated on catalysts, to reduce or prevent sintering at elevated temperatures, with effective weight ratios and compositions that maintain catalyst performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If catalysts are used at elevated temperatures (greater than 700°C), then chemical reactions such as syngas production and methane reforming can proceed, but sintering occurs leading to reduced surface area and catalyst deactivation
Solution Approach 1:
Lanthanide oxides serve as a protective intermediary layer coating the catalyst surface. This coating acts as a physical barrier that prevents direct contact and aggregation between catalytic material particles at elevated temperatures, thereby preventing sintering while allowing the underlying catalyst to maintain its reaction functionality.
Solution Approach 2:
The invention creates a composite catalyst structure consisting of the original catalytic material combined with lanthanide oxide components. This composite structure integrates the high-temperature reactivity of the catalyst with the thermal stability and sintering resistance of the lanthanide oxide, achieving both reaction efficiency and catalyst durability at elevated temperatures.
2Reliability
If the amount of catalyst is increased to compensate for sintering losses, then reaction effectiveness is maintained, but process costs increase
Solution Approach 1:
The lanthanide oxide coating is applied in advance to the catalyst surface before the catalyst undergoes sintering during reaction. This preliminary protective action prevents sintering from occurring in the first place, eliminating the need for subsequent catalyst replenishment or increased catalyst dosages to compensate for losses.
3Reliability
If continuous catalyst replenishment is implemented to counteract sintering, then catalyst performance is maintained, but process complexity increases
Solution Approach 1:
The lanthanide oxide-coated catalyst possesses inherent sintering resistance that enables it to self-maintain its surface area and performance characteristics during prolonged high-temperature operation. This self-protecting capability eliminates the need for external intervention through continuous catalyst replenishment or complex monitoring systems.
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
Lanthanide oxide-coated catalysts effectively prevent sintering at temperatures above 700°C, maintaining catalyst effectiveness and reducing costs by avoiding the need for continuous catalyst replenishment.
Implementation Method 1
lanthanide oxides to reduce sintering of catalytic materials... leads to reduced sintering when the catalyst is used at elevated temperatures
Data Source
AI summary
Disclosed is a lanthanide oxide coated catalyst, and methods for its use, that includes a supported catalyst comprising a support material, a catalytic material, and a lanthanide oxide, wherein the lanthanide oxide is attached to at least a portion of the surface of the supported catalyst.