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KR-20260065073-A - SHIP EXHAUST GAS TREATMENT SYSTEM AND SHIP INCLUDING THE SAME

KR20260065073AKR 20260065073 AKR20260065073 AKR 20260065073AKR-20260065073-A

Abstract

A ship exhaust gas treatment system according to one embodiment of the present disclosure comprises a ship engine that discharges exhaust gas; and a first exhaust gas purification unit through which the exhaust gas passes, wherein the first exhaust gas purification unit comprises a first support; and a first catalyst containing a first active metal supported on the first support, wherein the first support comprises a beta zeolite, and the first active metal comprises platinum (Pt) and iron (Fe). According to one embodiment of the present disclosure, exhaust gas emitted from an ammonia fuel-based vessel can be effectively purified.

Inventors

  • 고진영
  • 김민석
  • 박동찬
  • 김도희

Assignees

  • 에이치디한국조선해양 주식회사
  • 에이치디현대중공업 주식회사
  • 서울대학교산학협력단

Dates

Publication Date
20260508
Application Date
20241031

Claims (14)

  1. A ship engine that emits exhaust gas; and a first exhaust gas purification unit through which the exhaust gas passes, comprising The first exhaust gas purification unit comprises a first support; and a first catalyst containing a first active metal supported on the first support. The first support above comprises beta zeolite, and The first active metal above comprises platinum (Pt) and iron (Fe). Ship exhaust gas treatment system.
  2. In paragraph 1, The above-mentioned ship engine is an ammonia engine that uses ammonia as fuel, Ship exhaust gas treatment system.
  3. In paragraph 1, The molar ratio (Si/Al) of silicon (Si) to aluminum (Al) in the above beta zeolite is 5 to 50, Ship exhaust gas treatment system.
  4. In paragraph 1, The first catalyst comprises 0.01 to 0.1 parts by weight of platinum (Pt) per 100 parts by weight of a support, Ship exhaust gas treatment system.
  5. In paragraph 1, The first catalyst comprises 1 to 5 parts by weight of iron (Fe) per 100 parts by weight of a support, Ship exhaust gas treatment system.
  6. In paragraph 1, The above-mentioned first exhaust gas purification unit further includes a urea injection device for injecting urea into the exhaust gas, Ship exhaust gas treatment system.
  7. In paragraph 1, The above-mentioned ship exhaust gas treatment system further includes a turbocharger at the rear end of the ship engine, and The above-mentioned first exhaust gas purification unit is positioned at the rear end of the turbocharger, Ship exhaust gas treatment system.
  8. In paragraph 1, The above-mentioned ship exhaust gas treatment system further includes a second exhaust gas purification unit at the downstream end of the first exhaust gas purification unit, and The second exhaust gas purification unit comprises a second support; and a second catalyst containing a second active metal supported on the second support. The second support above includes beta zeolite, and The second active metal above comprises platinum (Pt) and iron (Fe). Ship exhaust gas treatment system.
  9. In paragraph 8, The above second exhaust gas purification unit further includes a burner for heating the second catalyst, Ship exhaust gas treatment system.
  10. In Paragraph 9, The above-described ship exhaust gas treatment system further includes a second sensor unit for analyzing exhaust gas between the first exhaust gas purification unit and the second exhaust gas purification unit, and The second sensor unit above controls the heating temperature of the burner, Ship exhaust gas treatment system.
  11. In Paragraph 10, The second sensor unit controls the heating temperature of the burner to heat the second catalyst to a predetermined temperature when the content of nitrous oxide ( N₂O ) contained in the exhaust gas that has passed through the first exhaust gas purification unit exceeds a predetermined content. Ship exhaust gas treatment system.
  12. In Paragraph 11, The above predetermined content is 1 to 20 ppm, Ship exhaust gas treatment system.
  13. In Paragraph 11, The above predetermined temperature is 400 to 600℃, Ship exhaust gas treatment system.
  14. A ship exhaust gas treatment system comprising any one of paragraphs 1 to 13, shipping.

Description

Ship Exhaust Gas Treatment System and Ship Including the Same The present disclosure relates to a ship exhaust gas treatment system and a ship including the same. Recently, there has been an increase in research on using ammonia, a carbon-neutral fuel, instead of conventional fossil fuels such as diesel fuel for ship propulsion. However, in the case of nitrogen-based fuels such as ammonia, there is a problem with the emission of nitrogen oxides, such as nitric oxide (NO), nitrogen dioxide ( NO₂ ), and nitrous oxide ( N₂O ), as well as ammonia ( NH₃ ) during use. In particular, 1) highly toxic ammonia ( NH₃ ) and 2) nitrous oxide ( N₂O ), which has a greenhouse gas impact approximately 265 times greater than that of carbon dioxide ( CO₂ ), are expected to be included in future regulations on greenhouse gas emissions from ships. Accordingly, there is a need for the development of technologies that can effectively reduce ammonia ( NH₃ ) and nitrous oxide ( N₂O ) contained in ship exhaust gases. FIGS. 1 to 3 are conceptual drawings illustrating a ship exhaust gas treatment system according to one embodiment. Figure 4 is a diagram showing the results of evaluating the ammonia ( NH₃ ) reduction rate of the catalyst of Example 1 for exhaust gas according to conditions 1 and 2. Figure 5 is a diagram showing the results of measuring the nitrogen oxide ( NOx ) concentration when exhaust gas according to conditions 1 and 2 is passed through the catalyst of Example 1. Figure 6 is a diagram showing the results of measuring the nitrous oxide ( N₂O ) concentration of the catalyst of Example 1 for exhaust gas according to conditions 1 and 2. Figure 7 is a figure showing the results of measuring the nitrogen oxide ( NOx ) concentration when exhaust gas according to condition 2 is passed through the catalysts of Comparative Example and Example 1. Figure 8 is a diagram showing the results of measuring the nitrous oxide ( N₂O ) concentration when exhaust gas according to condition 2 is passed through the catalysts of Comparative Example and Example 1. Figure 9 is a figure showing the results of evaluating the ammonia ( NH₃ ) reduction rate of the catalyst of Example 1 for exhaust gas according to conditions 3 and 4. Figure 10 is a figure showing the results of measuring the nitrogen oxide ( NOx ) concentration when exhaust gas according to conditions 3 and 4 is passed through the catalyst of Example 1. Figure 11 is a diagram showing the results of measuring the nitrous oxide ( N₂O ) concentration when exhaust gas according to conditions 3 and 4 is passed through the catalyst of Example 1. FIG. 12 is a figure showing the results of evaluating the ammonia ( NH₃ ) reduction rate of the catalysts of Examples 1 and 2 for exhaust gas according to Condition 1. FIG. 13 is a figure showing the results of evaluating the nitrogen selectivity of the catalysts of Examples 1 and 2 for exhaust gas according to Condition 1. Figure 14 is a diagram showing the results of measuring the nitrous oxide ( N₂O ) concentration when exhaust gas according to condition 1 is passed through the catalysts of Examples 1 and 2. Figure 15 is a figure showing the results of measuring the nitrogen oxide ( NOx ) concentration when exhaust gas according to condition 1 is passed through the catalysts of Examples 1 and 2. FIG. 16 is a figure showing the results of evaluating the ammonia ( NH₃ ) reduction rate of the catalysts of Examples 1 and 2 for exhaust gas according to Condition 4. Figure 17 is a diagram showing the results of measuring the nitrogen oxide ( NOx ) concentration when exhaust gas according to condition 4 is passed through the catalysts of Examples 1 and 2. Figure 18 is a diagram showing the results of measuring the nitrous oxide ( N₂O ) concentration when the exhaust gas according to condition 4 is passed through the catalysts of Examples 1 and 2. Hereinafter, embodiments of the present disclosure are described in detail with reference to FIGS. 1 to 18. However, the embodiments of the present disclosure may be modified in various different forms, and their scope is not limited to the embodiments described below. Furthermore, the embodiments of the present disclosure may not only be applied in a limited manner with the configurations of the embodiments described below, but may also be configured by selectively combining all or part of each embodiment to allow for various modifications. Catalyst for exhaust gas purification A catalyst for purifying exhaust gas according to one embodiment comprises a support; and an active metal supported on the support, wherein the support comprises a beta zeolite and the active metal comprises platinum (Pt) and iron (Fe). The catalyst for purifying exhaust gas not only has an excellent reduction rate for nitrogen oxides ( NOx ), but also has an excellent reduction rate for ammonia ( NH₃ ) at low temperatures and a reduction rate for nitrous oxide ( N₂O ) at high temperatures, so it can be used in a manner suitable