Dinitrogen Oxide Purification with Electric-Field Catalyst Activation
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Solution Overview
Problem
Existing catalyst composites struggle to effectively decompose or reduce dinitrogen oxide in engine exhaust gases, particularly in the presence of coexisting O2 and/or H2O, and at low temperatures.
Innovation Solution
A dinitrogen oxide purification system incorporating an intake section and a purification section with a catalyst and electrodes that apply an electric field, allowing for decomposition or reduction of dinitrogen oxide even in the presence of O2 and/or H2O, and utilizing a control section to modulate the purification rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a catalyst composite with rhodium component on ceria-based carrier is used, then the catalyst shows H2 consumption peak at about 100°C or lower, but the catalyst is difficult to obtain sufficient effects of decomposing or reducing dinitrogen oxide in exhaust gas from an engine in a temperature range of an engine exhaust heat
Solution Approach 1:
The patent changes the chemical composition parameters of the catalyst by incorporating a copper component alongside the rhodium component on the ceria-based carrier. This compositional parameter change enables the catalyst to maintain low-temperature activation (H2 consumption peak at 100°C or lower) while achieving sufficient dinitrogen oxide decomposition efficiency in engine exhaust temperature ranges.
2Adaptability or versatility
If the catalyst operates in the presence of coexisting O2 and/or H2O, then the catalyst must handle complex exhaust gas composition, but the catalyst performance is reduced due to interference from coexisting gases
Solution Approach 1:
The patent uses a composite catalyst material containing both rhodium and copper components supported on ceria-based carrier. This composite structure enables the catalyst to adapt to complex exhaust gas compositions with coexisting O2 and H2O while maintaining stable performance. The copper component specifically helps the catalyst resist interference from coexisting gases, ensuring reliable dinitrogen oxide decomposition in real exhaust conditions.
3Use of energy by stationary object
If the catalyst operates at low temperatures, then energy consumption is reduced, but the decomposition or reduction of dinitrogen oxide becomes less efficient
Solution Approach 1:
The patent modifies the catalyst's compositional parameters by adding copper to the rhodium-ceria system. This change enables the catalyst to achieve low-temperature operation (maintaining H2 consumption peak at 100°C or lower) while simultaneously improving dinitrogen oxide decomposition efficiency. The copper component enhances the catalyst's low-temperature activity, allowing efficient purification at reduced energy consumption levels.
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 system enhances dinitrogen oxide decomposition or reduction efficiency, particularly at low temperatures, by applying an electric field to the catalyst, thereby achieving sufficient purification rates despite the presence of coexisting gases and without requiring high temperatures.
Implementation Method 1
The purification section has a catalyst that decomposes or reduces the dinitrogen oxide
Implementation Method 2
an electrode that applies an electric field to the catalyst
Data Source
AI summary
[Problem] The present invention provides a dinitrogen oxide purification system, an internal combustion engine system, and a dinitrogen oxide purification method, which make it easy to obtain sufficient effects of decomposing or reducing dinitrogen oxide.[Solution] The dinitrogen oxide purification system 10 includes an intake section 14 and a purification section 1. The intake section 14 takes in dinitrogen oxide in the presence of coexisting O2 and/or H2O. The purification section 1 decomposes or reduces the dinitrogen oxide taken into the intake section 14.