WO2023176208A1 - 水分発生用反応炉 - Google Patents
水分発生用反応炉 Download PDFInfo
- Publication number
- WO2023176208A1 WO2023176208A1 PCT/JP2023/004136 JP2023004136W WO2023176208A1 WO 2023176208 A1 WO2023176208 A1 WO 2023176208A1 JP 2023004136 W JP2023004136 W JP 2023004136W WO 2023176208 A1 WO2023176208 A1 WO 2023176208A1
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- main body
- reactor
- catalyst layer
- platinum catalyst
- coated
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B5/00—Water
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/42—Platinum
Definitions
- the present invention relates to a moisture generation reactor that is mainly used in semiconductor manufacturing equipment and generates moisture by reacting hydrogen gas and oxygen gas.
- This reactor for moisture generation 1C includes a reactor body 6 in which an inlet-side furnace body member 3 having an inlet 2 for raw material gas and an outlet-side furnace body member 5 having an outlet 4 for moisture gas are welded and joined to face each other;
- a first reflecting plate 7 is disposed inside the reactor main body 6 to face the outlet 4 and is fixed to the inner wall surface of the reactor main body 6 while maintaining a gap G2.
- a second reflecting plate 8 is disposed facing the inlet 2 and fixed to the inner wall surface of the reactor main body 6 while maintaining a gap G1, and a platinum catalyst layer is provided on the inner wall surface of the outlet side reactor main body member 5. 9 is coated. Note that, for ease of understanding, the platinum catalyst layer is exaggerated with broken lines.
- the moisture generation reactor 1C having the above configuration supplies oxygen gas and hydrogen gas into the reactor body 6 through the raw material gas inlet 2, and performs a catalytic reaction lower than the ignition point (500 to 580°C) between hydrogen gas and oxygen gas.
- a catalytic reaction By causing a catalytic reaction with the platinum catalyst layer 9 at a temperature (400° C. or lower), high-purity moisture gas can be generated and taken out from the moisture gas outlet without combustion.
- the moisture generation reactor 1C shown in FIG. 6 is provided with a tapered portion 10 at the peripheral edge of the first reflecting plate 7 on the side facing the inner wall surface of the reactor main body 6, thereby preventing unexpected ignition and combustion. Moisture can be produced stably without any problems. That is, since the catalytic reaction occurs strongly at the portion that enters the gap G2 between the first reflecting plate 7 and the reactor main body 6, the provision of the tapered portion 10 prevents the raw material gas from rapidly flowing into the gap G2. By suppressing the occurrence of strong catalytic reactions, local temperature spikes are prevented and ignition is prevented.
- the above-mentioned conventional moisture generation reactor can achieve a moisture generation rate of 98% while preventing the risk of ignition, and has consistently achieved a high moisture generation rate.
- an object of the present invention is to provide a moisture generation reactor that can achieve a higher moisture generation rate while preventing the risk of ignition.
- a moisture generating reactor includes a reactor main body having a gas inlet and an outlet, and an inner part of the reactor main body disposed opposite to the outlet.
- a first reflecting plate that is fixed within the reactor main body while maintaining a gap with the wall surface and has a tapered portion on a peripheral edge facing the inner wall surface of the reactor main body; and a coating on the inner wall surface of the reactor main body. and a second platinum catalyst layer coated on the outer surface of the first reflecting plate on the side facing the reactor main body and inside the tapered part.
- the second platinum catalyst layer may be coated on the outer surface except for a portion where the ring-shaped spacer contacts the first reflective plate.
- the second platinum catalyst layer may be coated on the inner side of the ring-shaped spacer.
- the first platinum catalyst layer and the second platinum catalyst layer may be coated on the entire inner wall surface of the reactor main body and the entire surface of the first reflector plate with a barrier film.
- a tapered portion is disposed opposite to the inlet, is fixed within the reactor main body while maintaining a gap with the inner wall surface of the reactor main body, and has a tapered portion on a peripheral edge facing the inner wall surface of the reactor main body.
- the apparatus may further include a second reflecting plate having a barrier film coated on its entire surface and not coated with a platinum catalyst layer.
- the second platinum catalyst layer is coated on the outer surface of the first reflecting plate on the side facing the reactor main body and inside the tapered part, thereby preventing the risk of ignition. , higher moisture generation rate can be achieved.
- FIG. 1 is a sectional view showing a first embodiment of a moisture generation reactor according to the present invention.
- 2 is a partially enlarged view of FIG. 1.
- FIG. 2 is a sectional view taken along line III-III in FIG. 1.
- FIG. 4 is a sectional view showing a modification of the form shown in FIG. 3.
- FIG. 2 is a sectional view showing a second embodiment of the moisture generation reactor according to the present invention.
- FIG. 1 is a cross-sectional view showing a conventional moisture generation reactor.
- Embodiments of the moisture generating reactor according to the present invention will be described below with reference to FIGS. 1 to 5.
- the same or similar components are given the same reference numerals throughout all the figures and all the embodiments, including the prior art.
- a moisture generation reactor 1A includes a reactor main body 6 having an inlet 2 for raw material gas (oxygen and hydrogen) and an outlet 4 for moisture gas and unreacted raw material gas. , are disposed facing the outlet 4, are fixed in the reactor main body 6 while maintaining a gap G2 with the inner wall surface of the reactor main body 6, and are tapered at the peripheral edge facing the inner wall surface of the reactor main body 6.
- a first reflecting plate 7 having a section 10; a first platinum catalyst layer 9 coated on the inner wall surface of the reactor main body 6; a second platinum catalyst layer 11 coated on the outer surface of the catalyst.
- the moisture generation reactor 1A is equipped with a second reflection plate 8.
- the second reflecting plate 8 is disposed to face the inlet 2 and is fixed within the reactor main body 6 while maintaining a gap G1 with the inner wall surface of the reactor main body 6.
- a tapered portion 12 is provided at the opposing peripheral edge portions.
- the second reflecting plate 8 has a function of efficiently diffusing the raw material gas flowing in from the inlet 2 into the reactor main body 6.
- the reactor main body 6 has an inlet side furnace main body member 3 and an outlet side furnace main body member 5 joined together, and has a short cylindrical outer shape.
- An internal space P is formed by the recess 3a of the inlet furnace main body member 3 and the recess 5a of the outlet furnace main body member 5.
- the respective peripheral flange portions 3b and 5b of the recessed portion 3a and the recessed portion 5a are butted and welded to be joined.
- the gas inlet 2 is provided in the inlet-side furnace main body member 3.
- the moisture gas outlet 4 is provided in the outlet side furnace main body member 5.
- the first platinum catalyst layer 9 is mainly coated on the outlet side furnace main body member 5.
- the inlet-side furnace main body member 3 may also have a first platinum catalyst layer 9 coated on the inner surface of the peripheral flange portion 3b.
- the second reflecting plate 8 When the second reflecting plate 8 is coated with a platinum catalyst layer, a catalytic reaction occurs within the gap G1 immediately after the gas enters the furnace.
- the second reflecting plate 8 has a smaller heat capacity than the reactor main body, so it easily becomes high temperature, and it cannot radiate heat to the outside like the reactor main body 6. Therefore, if the second reflecting plate 8 is coated with a platinum catalyst layer, it will cause ignition. there's a possibility that. Therefore, it is desirable that the second reflective plate 8 is not coated with a platinum catalyst layer.
- the second reflecting plate 8 and the first reflecting plate 7 both have a disk shape.
- the second reflecting plate 8 and the first reflecting plate 7 are attached to the inner wall surface of the reactor main body 6 substantially parallel to each other with gaps G1 and G2 interposed therebetween, and the tapered parts 10 and 12 gradually increase toward the outer periphery of the reactor. The distance from the inner wall surface of the main body 6 is increased.
- the reactor body 6, the first reflecting plate 7, and the second reflecting plate 8 can be formed of stainless steel, but may also be formed of other materials such as nickel alloy, aluminum alloy, iron-chromium-aluminum alloy, etc. You can also.
- the inner surface of the reactor main body 6, the surface of the first reflecting plate 7, and the surface of the second reflecting plate 8 are entirely coated with a barrier coating 13 that is inert to oxygen and hydrogen.
- a first platinum catalyst layer 9 and a second platinum catalyst layer 11 are coated on the barrier coating 13 .
- the barrier coating prevents impurities in the base material such as stainless steel that constitutes the reactor main body 6 etc. from being released to the outside, and also prevents them from diffusing into the platinum catalyst layer, thereby preventing deterioration of the platinum catalyst layer. To prevent.
- barrier coating 13 a known material can be used.
- a barrier coating for example, TiN, Al2O3 , TiCN , TiAlN , Cr2O3 , SiO2 , CrN, Y2O3 , or Y2O3 and other metal oxides ( Ta2O5 , Mixed materials with ( SiO2 , TiO2 , ZrO2 , Al2O3 , HfO2 , La2O3 , CeO2 , Ce2O3 , MgO, ThO2 ) are known.
- the barrier film 13 can be formed by an ion plating method, an ion sputtering method, a PVD method such as a vacuum evaporation method, a chemical vapor deposition method (CVD method), a hot press method, a thermal spray method, or the like.
- the thickness of the barrier coating 13 can be approximately 0.1 ⁇ m to 5 ⁇ m.
- the first platinum catalyst layer 9 and the second platinum catalyst layer 11 can be formed by a vacuum deposition method, an ion plating method, a sputtering method, a chemical vapor deposition method, a hot press method, or the like.
- the thickness of the first platinum catalyst layer 9 and the second platinum catalyst layer 11 is preferably 0.1 ⁇ m to 3 ⁇ m. Note that, for ease of understanding, the platinum catalyst layer is shown in an exaggerated manner with a broken line in FIG.
- the first reflecting plate 7 is fixed to the reactor main body 6 with a fixing screw 15 via a ring-shaped spacer 14.
- a gap G2 is maintained between the first reflecting plate 7 and the inner wall surface of the reactor main body 6 by the ring-shaped spacer 14 through which the fixing screw 15 passes.
- the second reflection plate 8 is fixed to the reactor main body 6 with a fixing screw 17 via a ring-shaped spacer 16.
- the gaps G1 and G2 are preferably 0.5 to 1.0 mm, and are set to 0.5 mm in the illustrated example.
- the barrier coating is also provided on each surface of the ring-shaped spacers 14 and 16 and the fixing screws 15 and 17.
- the fixing screws 15 are arranged radially inside the tapered portion 10 of the first reflecting plate 7 along the tapered portion 10 at predetermined angular intervals (for example, four locations at 90° intervals).
- the catalytic reaction increases and a higher moisture generation rate can be obtained.
- the tapered portion 10 prevents the raw material gas from rapidly entering the gap G2, thereby preventing a drastic rise in temperature.
- the second platinum catalyst layer 11 is also coated on the tapered portion 10, the first platinum catalyst Combined with the reaction with layer 9, the catalytic reaction becomes stronger, the temperature rises rapidly, and there is a risk of ignition. Therefore, the second platinum catalyst layer 11 is coated on the surface inside the tapered part 10, excluding the tapered part 10.
- the ring-shaped spacer 14 may contact the second platinum catalyst layer 11 when tightening the fixing screw 15.
- the second platinum catalyst layer 11 is damaged and ignites due to this. Therefore, it is preferable that the second platinum catalyst layer 11 not be coated on the portion that contacts the ring-shaped spacer 14, and it is preferable that the second platinum catalyst layer 11 be coated in a circular shape radially inside the ring-shaped spacer 14.
- the second platinum catalyst layer 11 be spaced a predetermined distance L (FIGS. 2 and 3) from the ring-shaped spacer 14. .
- the distance L can be 4 to 7 mm.
- the inner surface of the tapered portion 10 may be coated with the second platinum catalyst layer 11, except for only the contact area with the ring-shaped spacer 14.
- the first platinum catalyst layer 9 can also be coated except for only the contact area with the ring-shaped spacer 14.
- the amount of unreacted gas flowing into the gap G2 decreases as it approaches the outlet 4, and the amount of unreacted gas flowing into the middle of the gap G2 decreases. Even if there is a platinum catalyst layer on both sides, a reaction (temperature rise) that would lead to ignition does not occur. Thereby, a higher rate of moisture generation can be achieved while avoiding the risk of ignition.
- FIG. 5 shows a second embodiment of the moisture generation reactor according to the present invention.
- the moisture generation reactor 1B of the second embodiment includes a slightly thicker first reflecting plate 7, but does not include the second reflecting plate 8 of the first embodiment, and is accordingly more compact.
- the rest of the configuration of the second embodiment is the same as that of the first embodiment, so detailed explanation will be omitted.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Hydrogen, Water And Hydrids (AREA)
Abstract
Description
2 入口
3 入口側炉本体部材
4 出口
5 出口側炉本体部材
6 反応炉本体
7 第1反射板
8 第2反射板
9 第1白金触媒層
10 テーパー部
11 第2白金触媒層
14,16 リング状スペーサ
15,17 固定ネジ
Claims (5)
- ガスの入口及び出口を有する反応炉本体と、
前記出口に対向状に配設され、前記反応炉本体の内壁面と間隙を保持して前記反応炉本体内に固定されるとともに、前記反応炉本体の内壁面と対向する周縁部にテーパー部を有する第1反射板と、
前記反応炉本体の内壁面にコーティングされた第1白金触媒層と、
前記第1反射板の前記反応炉本体と対向する側であって前記テーパー部より内側の外表面にコーティングされた第2白金触媒層と、
を備える、水分発生用反応炉。 - 前記第1反射板と前記反応炉本体の内壁面との間に介在されて、前記間隙を保持するためのリング状スペーサと、
前記リング状スペーサを通して前記第1反射板を前記反応炉本体に固定する固定ネジと、
を更に備え、
前記第2白金触媒層は、前記リング状スペーサが前記第1反射板と当接する部分を除く前記外表面にコーティングされている、請求項1に記載の水分発生用反応炉。 - 前記第2白金触媒層は、前記リング状スペーサより内側にコーティングされている、請求項2に記載の水分発生用反応炉。
- 前記反応炉本体の内壁面全面及び前記第1反射板全面にバリア皮膜をコーティングした上に前記第1白金触媒層および前記第2白金触媒層がコーティングされている、請求項1に記載の水分発生用反応炉。
- 前記入口に対向状に配設され、前記反応炉本体の内壁面と間隙を保持して前記反応炉本体内に固定されるとともに、前記反応炉本体の内壁面と対向する周縁部にテーパー部を有する第2反射板を更に備え、
前記第2反射板は、全面にバリア被膜がコーティングされ、白金触媒層がコーティングされていない、請求項1に記載の水分発生用反応炉。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024507575A JP7763537B2 (ja) | 2022-03-14 | 2023-02-08 | 水分発生用反応炉 |
| KR1020247010039A KR20240052957A (ko) | 2022-03-14 | 2023-02-08 | 수분 발생용 반응로 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-039549 | 2022-03-14 | ||
| JP2022039549 | 2022-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023176208A1 true WO2023176208A1 (ja) | 2023-09-21 |
Family
ID=88022772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/004136 Ceased WO2023176208A1 (ja) | 2022-03-14 | 2023-02-08 | 水分発生用反応炉 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7763537B2 (ja) |
| KR (1) | KR20240052957A (ja) |
| TW (1) | TWI857497B (ja) |
| WO (1) | WO2023176208A1 (ja) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10297907A (ja) * | 1997-04-28 | 1998-11-10 | Tadahiro Omi | 水分発生用反応炉 |
| WO2001094254A1 (fr) * | 2000-06-05 | 2001-12-13 | Fujikin Incorporated | Reacteur de production d'humidite |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW440542B (en) * | 1997-03-26 | 2001-06-16 | Fujikin Kk | Reactor for generation of moisture |
| JP3686762B2 (ja) | 1998-12-04 | 2005-08-24 | 株式会社フジキン | 水分発生用反応炉 |
| JP5837733B2 (ja) * | 2009-04-24 | 2015-12-24 | 国立大学法人東北大学 | 水分発生用反応炉 |
-
2023
- 2023-02-08 KR KR1020247010039A patent/KR20240052957A/ko active Pending
- 2023-02-08 WO PCT/JP2023/004136 patent/WO2023176208A1/ja not_active Ceased
- 2023-02-08 JP JP2024507575A patent/JP7763537B2/ja active Active
- 2023-02-21 TW TW112106214A patent/TWI857497B/zh active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10297907A (ja) * | 1997-04-28 | 1998-11-10 | Tadahiro Omi | 水分発生用反応炉 |
| WO2001094254A1 (fr) * | 2000-06-05 | 2001-12-13 | Fujikin Incorporated | Reacteur de production d'humidite |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI857497B (zh) | 2024-10-01 |
| JPWO2023176208A1 (ja) | 2023-09-21 |
| KR20240052957A (ko) | 2024-04-23 |
| JP7763537B2 (ja) | 2025-11-04 |
| TW202342364A (zh) | 2023-11-01 |
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