System and methods for improved emission control of internal combustion engines

A technology of fuel and fuel treatment, applied to improve IC machine performance and emission control, emission control system, fuel treatment. field, able to solve problems such as system design complexity

Inactive Publication Date: 2005-04-27
能量催化系统公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will complicate the overall system design

Method used

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  • System and methods for improved emission control of internal combustion engines
  • System and methods for improved emission control of internal combustion engines
  • System and methods for improved emission control of internal combustion engines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0110] Example 1. A monolithic catalyst was prepared as described in US Patent 5,259,754 to Dalla Betta et al. Rhodium trichloride was dissolved in deionized water at a concentration of about 0.18g Rh / cc, and then added with about 75m 2 / g surface area of ​​zirconia powder. With stirring the mixture, further 20% aqueous ammonium hydroxide solution was added to pH 8. The mixture was then evaporated to dryness and the resulting powder was calcined at 700° C. for 10 hours in air. The final rhodium concentration was 5.5 wt% of the final catalyst. The Rh / ZrO 2 The catalyst was slurried with water and 10% by weight of a 20% zirconium acetate solution to form a slurry with approximately 30% solids.

[0111] A 0.050mm thick, 75mm wide, 3m long River Lite 20-5Sr strip from the Kawasaki Steel Company was corrugated to form V-grooves across a width of 75mm arranged in a herringbone pattern. The groove is about 0.8mm deep. The flake was treated in air at 900°C for 10 hours to form a...

Embodiment 2

[0112] Example 2. Catalyst from Example 1 was placed into a flow reactor containing gas sources and mass flow meters for air, nitrogen and helium as quantitative tracers for mass spectrometry, electric heaters, water injection A second air-assisted sprayer for diesel injection and a static mixer upstream of the catalyst. The catalyst was contained in an isolated area with a diameter of 50 mm, and thermocouple temperature sensors were located upstream and downstream of the catalyst. The mass spectrometer sampling probe was located approximately 50 cm downstream of the catalyst outlet. Adjust air, nitrogen and water flows to form a mixture flowing at 800 SLPM (standard liters per minute) with 5% H 2 O, 8% O 2 , 0.3% He and balance N 2 composition. The mixture was then heated to 370°C with an electric heater. The test results are shown in Figure 8 middle.

[0113] Figure 8 A shows H converted to volume percent concentration units 2 and CO 2 mass spectrum signal. Fig...

Embodiment 3

[0115] Example 3. Figure 9 Another example of generating a pulse of hydrogen is shown. The catalyst used in this example was prepared in a manner similar to that of Example 1, except that the metal flake was corrugated with a groove depth of 1.2 mm. Adjust air, nitrogen and water flows to form a mixture flowing at 200 SLPM (standard liters per minute) with 8% H 2 O, 5% O 2 , 0.3% He and balance N 2 composition. The mixture was then heated to 300°C with an electric heater. Panel A shows H converted to volume percent concentration units 2 and CO 2 mass spectrum signal. Graph B shows the catalyst outlet gas temperature 906 as measured by two thermocouples and the temperature 904 inside the catalyst 1 inch from the outlet. Graph C shows the fuel flow in g / min set by the control system. At time equal to 2630 seconds, the fuel was turned on at a flow rate of 1.8 gm / minute. The fuel burns on the catalyst and a thermocouple close to the catalyst inlet rises rapidly. At a t...

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Abstract

The present invention provides systems and methods to improve the performance and emission control of internal combustion engines equipped with nitrogen oxides storage-reduction ('NSR') emission control systems (206). The system comprises a NSR catalyst (206), a fuel processor (200) located upstream of the NSR catalyst, and at least one fuel injection port (208). The fuel processor (200) converts a fuel into a reducing gas mixture comprising CO and H>2<. The reducing gas mixture is then fed into the NSR catalyst (206), where it regenerates the NSR adsorbent, reduces the NO>x< to nitrogen, and optionally periodically desulfates the NSR catalyst. The fuel processor (200) comprises one or more catalysts, which facilitate reactions such as combustion, partial oxidation, and / or reforming and help consume excess oxygen present in an engine exhaust stream. The methods of the present invention provide for NSR catalyst adsorbent regeneration. Control strategies are provided to control the system and methods of the invention.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Patent Application Serial No. 60 / 337,023, filed December 3, 2001, entitled "Apparatus and Method for Improved Emission Control of Internal Combustion Engines," the entirety of which is incorporated herein by reference . field of invention [0003] This invention relates generally to internal combustion ("IC") engines and, more particularly, to apparatus, systems and methods for improving the performance and emission control of IC engines that produce nitrogen oxides ("NO x ”) emissions. The invention also relates generally to emission control systems, catalytic reaction systems, and fuel treatment. Background of the invention [0004] Efforts to improve air quality have resulted in stringent government-issued emission controls and regulations. Over the past 30 years, the permissible emissions of spark-ignition ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B17/04B01D53/94F01N3/08F01N3/20F01N3/28F01N3/36F01N13/02
CPCF01N2610/03F01N3/0842B01D53/9431F01N3/0821F01N3/0871F01N3/0814F01N2610/10F01N13/02F01N2610/04F01N2240/20F01N3/2882F01N2240/30F01N3/2892F01N13/009F01N3/08
Inventor R·达拉贝塔J·西泽龙
Owner 能量催化系统公司
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