Heated Three-Way Catalytic Converter for Low-Platinum Efficiency
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Solution Overview
Problem
Existing three-way catalytic converters face challenges with low catalytic efficiency and incomplete catalysis due to excessive requirements for the thickness and uniformity of the precious metal plating layer and the surface area of the ceramic carrier, which incur economic pressures.
Innovation Solution
A three-way catalytic converter design that includes a cylindrical housing with a heater wrapped around its outer side wall, heating the catalytic assembly to increase efficiency without increasing the thickness or uniformity of the plating layer or ceramic carrier surface area, utilizing a heater to elevate temperature and enhance catalytic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness and uniformity of the precious metal plating layer are increased, then the catalytic efficiency is improved, but the manufacturing cost increases
Solution Approach 1:
The patent introduces a heating device to change the temperature parameter of the catalytic converter, enabling it to operate at optimal temperatures without requiring excessive precious metal plating. This parameter change allows the system to achieve high catalytic efficiency with reduced material consumption, directly resolving the contradiction between catalytic efficiency and manufacturing cost.
2Reliability
If the surface area of the ceramic carrier is increased, then the catalytic efficiency is improved, but the device complexity and cost increase
Solution Approach 1:
The heating device changes the temperature parameter to enhance catalytic reaction efficiency. By optimizing the temperature, the system achieves effective catalysis without requiring an excessively large ceramic carrier surface area, thus reducing device complexity while maintaining high catalytic efficiency.
3Reliability
If the temperature of the catalytic assembly is increased, then the catalytic efficiency is improved, but the energy consumption increases
Solution Approach 1:
The heating device performs preliminary heating of the catalytic assembly before the main catalytic process. This preliminary action brings the system to optimal operating temperature quickly, after which the exothermic catalytic reactions can maintain the temperature with minimal additional energy input, thus improving catalytic efficiency while controlling overall energy consumption.
Solution Approach 2:
The catalytic converter is designed to be self-sustaining once activated. The exothermic nature of the catalytic reactions generates heat that maintains the optimal temperature for continued efficient operation, reducing the need for continuous external energy input while maintaining high catalytic efficiency.
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
Enhances catalytic efficiency by temperature increase, reducing the need for thicker plating layers and larger ceramic carriers, thus addressing economic and performance issues.
Implementation Method 1
a heater circumferentially wrapped around an outer side wall of the cylindrical housing, the three-way catalytic assembly being heated by energizing the heater
Implementation Method 2
catalysis that harmful gases such as CO, HC and NOx are converted into harmless carbon dioxide, water and nitrogen through oxidation and reduction
Implementation Method 3
catalysis that harmful gases such as CO, HC and NOx are converted into harmless carbon dioxide, water and nitrogen through oxidation and reduction
Implementation Method 4
Three-way catalysis refers to catalysis that harmful gases such as CO, HC and NOx are converted into harmless carbon dioxide, water and nitrogen through oxidation and reduction
Data Source
AI summary
Three-way catalytic converters and devices for processing tail gases are disclosed. In some embodiments, a three-way catalytic converter includes a cylindrical housing, a three-way catalytic assembly provided in the cylindrical housing, a tail gas inlet and a tail gas outlet provided at the top of the cylindrical housing and communicated with the cylindrical housing, and a heater circumferentially wrapped around the outer side wall of the cylindrical housing. The three-way catalytic assembly is heated by energizing the heater. In other embodiments, a first cavity is formed between the three-way catalytic assembly and one end of the cylindrical housing, a second cavity is formed between the three-way catalytic assembly and another end of the cylindrical housing, the tail gas inlet is connected with the first cavity, and the tail gas outlet is connected with the second cavity.