Reduction of NOx in exhaust gases from combustion engines
A tamper-proof PSA system with a high-pressure molecular sieve addresses the limitations of existing NOx reduction methods by achieving fuel savings and adaptability across diverse combustion engines and fuels, while withstanding extreme pressures and climatic variations.
Patent Information
- Application Number
- DE202025001774
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-06-30
- Publication Date
- 2026-01-22
- Estimated Expiration
- 2035-06-30
AI Technical Summary
Existing methods for reducing NOx in exhaust gases from combustion engines often require tampering with the engine or exhaust system and are not universally applicable across different combustion processes and fuels, and they do not effectively address fuel efficiency and climatic variations.
A tamper-proof PSA system using a high-pressure PSAO2X P 8 x 12UOP molecular sieve, which can be installed independently of the engine or exhaust system position, and optionally integrated with a pre-drying unit, to reduce NOx in exhaust gases without altering the engine or exhaust system, applicable to various combustion processes and fuels.
The system achieves a 17% fuel savings for gasoline and diesel engines, operates under extreme pressures, and adapts to different climatic conditions, providing a robust and efficient NOx reduction solution.
Smart Images
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Abstract
Description
[0001] The invention relates to a reduction of NOx in exhaust gases from all types of combustion engines, including those using hydrogen, by means of a non-tamperable hardware solution without intervention in the engine or exhaust system. In particular, the invention relates to a PSA system for reducing NOx in exhaust gases from combustion engines.
[0002] The object of the invention is to reduce NOx in exhaust gases from internal combustion engines. This object is achieved by a PSA system according to claim 1.
[0003] The invention represents a tamper-proof, 100% hardware solution. The application areas of the invention include road vehicles, ships, and stationary industrial engines.
[0004] The PSA system according to the invention is applicable to all combustion processes and fuels. Exhaust gas recirculation, the DeNOx catalyst, and the addition of urea are not required.
[0005] The local installation position of the molecular sieve system according to the invention is independent of the position of an internal combustion engine.
[0006] The PSA system according to the invention is used for drying and N2 reduction in the combustion air.
[0007] The local installation position of the PSA system according to the invention is independent of the spatial position.
[0008] Molecular sieve technology is suitable for supplying central combustion air networks, e.g. power plants, production facilities (factory units), container ships, cruise ships and similar.
[0009] The invention results in fuel savings of 17% for gasoline and diesel engines.
[0010] Extensive test runs with various changes to the operating parameters were necessary to select the optimal molecular sieve type. The molecular sieve in question is a high-pressure PSA, specifically type PSAO2X P 8 x 12UOP molecular sieve.
[0011] Operating pressures are possible that have never been tested in practice before, both the level of pressures suitable for application and under crash conditions (mechanical strength of the molecular sieve).
[0012] Depending on climatic conditions, a pre-drying unit, UOP MOLSIV Adsorbent TE 143 R, can also be integrated into the equipment. Fig. Figure 1 shows a flow diagram for reducing the N2 content in the combustion air.
Claims
[1] PSA system for reducing NOx in exhaust gases from internal combustion engines, characterized by that the PSA plant is designed as a molecular sieve plant.