JP2017144377A - ハニカム構造体 - Google Patents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2474—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure of the walls along the length of the honeycomb
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
- B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
- B01D46/2418—Honeycomb filters
- B01D46/2451—Honeycomb filters characterized by the geometrical structure, shape, pattern or configuration or parameters related to the geometry of the structure
- B01D46/2482—Thickness, height, width, length or diameter
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
- B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
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- B01J35/19—Catalysts containing parts with different compositions
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths
- B01J35/57—Honeycombs
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- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
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- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/024—Multiple impregnation or coating
- B01J37/0244—Coatings comprising several layers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/101—Three-way catalysts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
- F01N3/2842—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for monolithic supports, e.g. of honeycomb type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/903—Multi-zoned catalysts
- B01D2255/9032—Two zones
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- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/915—Catalyst supported on particulate filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/915—Catalyst supported on particulate filters
- B01D2255/9155—Wall flow filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
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- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
- F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
Description
本実施形態のハニカム構造体1は、図1及び図2に主として示されるように、一方の端面2aから他方の端面2bまで延びる複数のセル3を区画形成する多孔質性のセラミックス材料によって形成された格子状の隔壁4を有する略円柱状のハニカム基材10と、一方の端面2aにおけるセル3を予め規定した配設基準に従って目封止した片側目封止部11と備えて主に構成されている。
本実施形態のハニカム構造体1において、隔壁内部4aに含浸及び隔壁表面4bに塗布される触媒Cとして、例えば、「三元触媒」を用いることができる。三元触媒は、主に炭化水素(HC)、一酸化炭素(CO)、及び窒素酸化物(NOx)を浄化する触媒であり、例えば、白金(Pt)、パラジウム(Pd)、ロジウム(Rh)を含むものであっても構わない。三元触媒により、炭化水素は水と二酸化炭素に、一酸化炭素は二酸化炭素に、窒素酸化物は窒素にそれぞれ酸化または還元反応によって浄化される。
更に、本発明のハニカム構造体は、上記第一領域R1及び第二領域R2の間に、第三領域R3を有するものであっても構わない。例えば、本発明の別例構成のハニカム構造体1’は、図4に示すように、触媒含浸隔壁12及び触媒層隔壁13が互いに重なり合うように形成された触媒共有部15を有する第三領域R3を備えるものである。触媒共有部15を有することによって、触媒含浸隔壁12及び触媒層隔壁13のいずれの作用効果も奏することができる。しかしながら、隔壁表面4bに形成された触媒層14によって、第三領域R3では、排気ガスEGの隔壁内部4aの通過が阻害され、圧力損失が上昇する可能性を有している。
上記の実施例及び比較例、及び基準ハニカムに係るハニカム構造体を装着した排気ガス浄化装置を、排気量2.0リットルの直噴式ガソリンエンジンを搭載した乗用車の排気系にそれぞれ装着する。その後、シャシダイナモによる車両試験として、国際調和排ガス試験モード(WLTC)の運転条件に従って運転した際の排気ガス中の一酸化炭素(CO)、炭化水素(HC)、及び窒素酸化物(NOx)のエミッションを測定し、エミッション値を得た。得られたエミッション値を、基準体のハニカム構造体の値と対比し、一酸化炭素、炭化水素、及び窒素酸化物の全ての成分の上昇値が0〜10%未満であるものを“A”とし、10〜20%未満の範囲のものを“B”とし、20%以上のものを“C”とした。なお、表2において、浄化率の測定に係る評価項目を“浄化率(CO,HC,NOx)”を表している。
実施例及び比較例、及び基準ハニカムに係るハニカム構造体を装着した排気ガス浄化装置を、排気量2.0リットルの直噴式ガソリンエンジンを搭載した乗用車の排気系に装着する。その後、シャシダイナモによる車両試験として、国際調和排ガス試験モード(WLTC)の運転条件に従って運転した際の排気ガス中のPM排出個数を欧州EURO6規制案に沿った方法に基づいて測定する。ここで、PM排出個数が3×1011個/km以下のものを“A”とし、3×1011〜6×1011個/km未満の範囲のものを“B”とし、6×1011個/km以上を“C”とした。
排気量2.0リットルの直噴式ガソリンエンジンの台上試験において、始めに、排気系にセル密度:46.5個/cm2、隔壁厚さ:216μm、ハニカム径:118.4mm、ハニカム長さ:127mm、触媒コート量:100g/lの両端を目封止したハニカム構造体(基準ハニカム)を装着する。このときのエンジンフルロード運転時の圧力損失を測定し、これを圧力損失の基準値とする。実施例及び比較例に係るハニカム構造体を使用した排気ガス浄化装置を同様に排気量2.0リットルの直噴式ガソリンエンジンを搭載した乗用車の排気径に装着し、上記と同条件のエンジンフルロード運転時の圧力損失を測定した。その後、基準体によって得られた圧力損失の基準値に対して、圧力損失の低減量が40%以上の場合を“A”とし、圧力損失の低減量が20%〜40%未満の場合を“B”とし、圧力損失の低減量が20%以下の場合を“C”とした。
上記浄化率(CO,HC,NOx)、(2)PM排出個数、及び(3)圧力損失における各評価項目において、全ての評価項目が“A”若しくは二つ以上が“A”の場合は、総合判断として“A”とし、二つの評価項目で“B”がある場合は“B”とし、“C”が一項目でもある場合を“C”とする。総合判断において、“A”,“B”を合格とし、”C”は不合格とする。
Claims (4)
- 一方の端面から他方の端面まで延びる複数のセルを区画形成する多孔質の隔壁を有するハニカム基材と、
前記一方の端面における前記セルを所定の配設基準に従って目封止した片側目封止部と
を備え、
前記隔壁は、
前記片側目封止部の設けられた前記一方の端面から前記ハニカム基材の軸方向に沿って延びた所定長さの第一領域に形成され、隔壁内部に触媒を含浸して形成された触媒含浸隔壁と、
前記他方の端面から前記ハニカム基材の軸方向に沿って延びた所定長さの第二領域に形成され、隔壁表面に前記触媒を層状に塗布した触媒層を有する触媒層隔壁と
を具備するハニカム構造体。 - 前記ハニカム基材の軸方向の全長に対する前記第一領域の長さの比率は、
1/3〜2/3の範囲であり、
前記ハニカム基材の軸方向の全長に対する前記第二領域の長さの比率は、
1/3〜2/3の範囲である請求項1に記載のハニカム構造体。 - 前記第一領域及び前記第二領域の間に、前記ハニカム基材の軸方向に沿って延びた所定長さの第三領域を更に有し、
前記第三領域は、
前記触媒含浸隔壁及び前記触媒層隔壁をいずれも含んで構成され、または、前記触媒含浸隔壁及び前記触媒層隔壁をいずれも含まないで構成されている請求項1または2に記載のハニカム構造体。 - 前記触媒は、
三元触媒が用いられる請求項1〜3のいずれか一項に記載のハニカム構造体。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016027240A JP6635819B2 (ja) | 2016-02-16 | 2016-02-16 | ハニカム構造体 |
| US15/426,332 US10315192B2 (en) | 2016-02-16 | 2017-02-07 | Honeycomb structure |
| CN201710070855.5A CN107084030B (zh) | 2016-02-16 | 2017-02-09 | 蜂窝结构体 |
| DE102017001240.7A DE102017001240A1 (de) | 2016-02-16 | 2017-02-09 | Wabenstruktur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016027240A JP6635819B2 (ja) | 2016-02-16 | 2016-02-16 | ハニカム構造体 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2017144377A true JP2017144377A (ja) | 2017-08-24 |
| JP6635819B2 JP6635819B2 (ja) | 2020-01-29 |
Family
ID=59410041
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2016027240A Active JP6635819B2 (ja) | 2016-02-16 | 2016-02-16 | ハニカム構造体 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US10315192B2 (ja) |
| JP (1) | JP6635819B2 (ja) |
| CN (1) | CN107084030B (ja) |
| DE (1) | DE102017001240A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019065206A1 (ja) * | 2017-09-28 | 2019-04-04 | 株式会社キャタラー | 排ガス浄化用触媒 |
| CN111828141A (zh) * | 2019-04-22 | 2020-10-27 | 丰田自动车株式会社 | 结构体 |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6545962B2 (ja) * | 2015-01-22 | 2019-07-17 | 株式会社キャタラー | 排ガス浄化用触媒 |
| JP2019058875A (ja) * | 2017-09-27 | 2019-04-18 | イビデン株式会社 | ハニカム触媒 |
| JP2019058876A (ja) | 2017-09-27 | 2019-04-18 | イビデン株式会社 | ハニカム触媒 |
| JP7049155B2 (ja) * | 2018-03-30 | 2022-04-06 | 日本碍子株式会社 | ハニカムフィルタ |
| JP7127606B2 (ja) * | 2019-04-24 | 2022-08-30 | 株式会社デンソー | 排ガス浄化フィルタ |
| WO2020254208A1 (en) * | 2019-06-21 | 2020-12-24 | Climeworks Ag | Adsorber structure for gas separation processes |
| EP4079401B1 (en) * | 2019-12-18 | 2024-03-27 | Mitsui Mining & Smelting Co., Ltd. | Exhaust gas purification catalyst |
| EP4121400A1 (en) * | 2020-03-19 | 2023-01-25 | Corning Incorporated | Cement plug composition for application to a ceramic honeycomb body and method of forming plugged ceramic honeycomb body with the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111148571A (zh) * | 2017-09-28 | 2020-05-12 | 株式会社科特拉 | 排气净化用催化剂 |
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Also Published As
| Publication number | Publication date |
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| US10315192B2 (en) | 2019-06-11 |
| US20170232429A1 (en) | 2017-08-17 |
| CN107084030A (zh) | 2017-08-22 |
| JP6635819B2 (ja) | 2020-01-29 |
| DE102017001240A1 (de) | 2017-08-17 |
| CN107084030B (zh) | 2021-10-26 |
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