JPS62254843A - Catalyst carrier - Google Patents
Catalyst carrierInfo
- Publication number
- JPS62254843A JPS62254843A JP61099152A JP9915286A JPS62254843A JP S62254843 A JPS62254843 A JP S62254843A JP 61099152 A JP61099152 A JP 61099152A JP 9915286 A JP9915286 A JP 9915286A JP S62254843 A JPS62254843 A JP S62254843A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- lanthanum
- barium
- catalyst
- carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 46
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 29
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052788 barium Inorganic materials 0.000 claims abstract description 25
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 230000009466 transformation Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 239000007864 aqueous solution Substances 0.000 description 7
- 230000007423 decrease Effects 0.000 description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 7
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 description 4
- 239000010948 rhodium Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- 229910052697 platinum Inorganic materials 0.000 description 3
- 229910052703 rhodium Inorganic materials 0.000 description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 3
- 238000003809 water extraction Methods 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 241000284156 Clerodendrum quadriloculare Species 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 238000010669 acid-base reaction Methods 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- WDIHJSXYQDMJHN-UHFFFAOYSA-L barium chloride Chemical compound [Cl-].[Cl-].[Ba+2] WDIHJSXYQDMJHN-UHFFFAOYSA-L 0.000 description 1
- 229910001626 barium chloride Inorganic materials 0.000 description 1
- 150000001553 barium compounds Chemical class 0.000 description 1
- QKYBEKAEVQPNIN-UHFFFAOYSA-N barium(2+);oxido(oxo)alumane Chemical compound [Ba+2].[O-][Al]=O.[O-][Al]=O QKYBEKAEVQPNIN-UHFFFAOYSA-N 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002604 lanthanum compounds Chemical class 0.000 description 1
- -1 lanthanum tetrahydride Chemical compound 0.000 description 1
- FYDKNKUEBJQCCN-UHFFFAOYSA-N lanthanum(3+);trinitrate Chemical compound [La+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O FYDKNKUEBJQCCN-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- VXNYVYJABGOSBX-UHFFFAOYSA-N rhodium(3+);trinitrate Chemical compound [Rh+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VXNYVYJABGOSBX-UHFFFAOYSA-N 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/63—Platinum group metals with rare earths or actinides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- 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
-
- 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
- B01J23/10—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of rare earths
-
- 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
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/58—Platinum group metals with alkali- or alkaline earth metals
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、アルミナを主成分とする触媒担体であり、自
動車排気浄化用触Ｖ＆あるいは燃焼触媒等に使用する担
体に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a catalyst carrier containing alumina as a main component, which is used as a catalyst for purifying automobile exhaust gas or as a combustion catalyst.
従来、触媒担体に使われているアルミナは。 Alumina is conventionally used as a catalyst carrier.
１０００°Ｃ以上の高温下ではα−アルミナに変態し、
しかも表面積は１０４ｆ以下に低下してしまい、担持し
た触媒成分の活性を十分に引き出すことができない。At high temperatures over 1000°C, it transforms into α-alumina,
Moreover, the surface area decreases to 104f or less, and the activity of the supported catalyst component cannot be fully brought out.
従来、このアルミナにおける表面積の低下防止。Traditionally, this prevents surface area reduction in alumina.
ａ−アルミナへの変態防止などの熱的安定性を向上させ
る方法として、アルカリ土類金属であるバリウムを添加
すること（第５６回触謀討論会予稿集４Ｎ１７，１９２
（１９８５）、特開昭５０−９０５９０号）、あるいは
酸化ワンタン（Ｌ〜０８）を添加すること（特開昭４８
−１４６００号）が提案されている。a- Addition of barium, an alkaline earth metal, as a method of improving thermal stability such as preventing transformation to alumina (Proceedings of the 56th Takashi Symposium 4N17, 192
(1985), JP-A No. 50-90590), or adding wonton oxide (L~08) (JP-A No. 48, No. 48).
-14600) has been proposed.
しかしながら、上記提案においても、 １０００°Ｃ以
上の高温下における表面積の低下が大きく。However, even in the above proposal, the surface area decreases significantly at high temperatures of 1000°C or higher.
更に貴金属等からなる触媒成分の分散性が悪く。Furthermore, the dispersibility of catalyst components made of noble metals etc. is poor.
耐熱性触媒担体として十分に来月化されるものは得られ
ていない。A sufficient heat-resistant catalyst carrier has not yet been obtained.
そこで９本発明者らは、上記の問題を解決すべく、アル
ミナにバリウムとランタンとを添加してなる触媒担体を
考え、しかも更に性能に優れたものを開発すべく鋭意検
討した結果１本発明を成すに至ったものでおる。Therefore, in order to solve the above-mentioned problems, the present inventors considered a catalyst carrier made by adding barium and lanthanum to alumina, and as a result of intensive study to develop a catalyst carrier with even better performance, the present inventors have invented the present invention. This is what has led to this.
本発明は、１０００”Ｃ以上の高温下においても十分な
表面積を有し、しかも触媒成分の高い分散性を有する耐
熱性に優れた。アルミナを主成分とする触媒担体を提供
しようとするものである。The present invention aims to provide a catalyst carrier mainly composed of alumina, which has a sufficient surface area even at high temperatures of 1000"C or more, and has excellent heat resistance with high dispersibility of catalyst components. be.
本発明は、アルミナ中に、該アルミナに対シて１１１〜
３モル％のランタンと該ランタンに対して０．０１〜４
０モル倍のバリウムとを含有してなることを特徴とする
触媒担体である。The present invention provides alumina containing 111 to 111 to
3 mol% of lanthanum and 0.01 to 4 for the lanthanum
This catalyst carrier is characterized by containing 0 mole of barium.
本発明において、アルミナ（Ａム０３）は、触媒担体の
主成分をなすものである。該アルミナの形■としては、
ガンマ（γ）、デルタ（δ）、イータ（η）、カイ（χ
）、シータ（θ）、カッパ（ｋ）等、いかなるものでも
よいが、その中でもｒ−アルミナが最も望ましい。In the present invention, alumina (Am03) is the main component of the catalyst carrier. The shape of the alumina is as follows:
Gamma (γ), Delta (δ), Eta (η), Chi (χ
), theta (θ), kappa (k), etc., but r-alumina is the most desirable among them.
ランタン及びバリウムは、上記アルミナ中に含有してな
るものである。この２成分のアルミナ中での含有形態と
しては、アルミナ中に固溶した状悲が望ましい。Lanthanum and barium are contained in the alumina. As for the form in which these two components are contained in alumina, it is desirable that they are solid-dissolved in the alumina.
ランタンの含有量は、アルミナに対してα１〜３モル％
の範囲内とする。該含有量がα１モル％未満では、アル
ミナがａ−アルミナへ転移しやすく９表面積の低下が大
きい。また含有量が３モル％を越える場合には、アルミ
ナとランタンとが反応してワンタンアルミネート（Ｌα
ＡＡ！０３ ）が生成し１表面積を低下させる原因とな
る。The content of lanthanum is α1 to 3 mol% relative to alumina.
within the range of If the content is less than 1 mol % of α, alumina is likely to be converted to a-alumina, resulting in a large decrease in surface area. In addition, when the content exceeds 3 mol%, alumina and lanthanum react to form wonton aluminate (Lα
AA! 03) is generated and causes a decrease in surface area.
また、バリウムの含有量は、上記ランタンに対して（１
０１〜４０モル倍とする。なお２例えば。In addition, the barium content is (1
01 to 40 times the mole. For example, 2.
バリウム含有量がランタンに対してα０１モル倍とは、
ランタン１モルに対してバリウムが１０１モル含有する
ことを示す。該含有量がα０１モル倍未満では、貴金属
成分を担持する時に起きる酸・塩基反応に寄与する担体
表面の塩基性が弱くなり。The barium content is α01 times that of lanthanum by mole.
This shows that barium is contained in 101 moles per mole of lanthanum. If the content is less than α01 times by mole, the basicity of the carrier surface, which contributes to the acid-base reaction that occurs when supporting the noble metal component, becomes weak.
触媒成分の分散性が悪くなる。また含有量が４０モル倍
を越える場合には、アルミナとバリウムとが反応してア
ルミン酸バリウム（ＢαＯ＠Ａ５，０．）が生成し１表
面積を低下させる原因となり、しかも担体表面の塩基性
が強すぎて触媒成分の分散性が低下する。Dispersibility of catalyst components deteriorates. In addition, if the content exceeds 40 moles, alumina and barium react to form barium aluminate (BαO@A5,0.), which causes a decrease in surface area, and furthermore, the basicity of the carrier surface increases. If it is too strong, the dispersibility of the catalyst component will decrease.
本発明の触媒担体の製造方法としては、アルミナとラン
タンとバリウムとの粉末を混合して高温で焼成する方法
、あるいは含浸法を利用する方法等がある。この含浸法
を利用する方法としては。Methods for producing the catalyst carrier of the present invention include a method of mixing powders of alumina, lanthanum, and barium and firing the mixture at a high temperature, or a method of using an impregnation method. How to use this impregnation method.
例えば、４化ランタン、 ｔｉｆｉ酸ランタン、塩化バ
リウム、硝酸バリウム等のランタン、バリウムの水溶性
化合物を溶解させた水溶液を用い、該水溶液をアルミナ
に含浸させた後、該アルミナを乾燥させ、然る後焼成す
るものである。なお、ランタンまたはバリウムの一方の
元素を含有させた後、他方の元素を含有させてもよく、
するいは水溶性ランタン化合物と水溶性バリウム化合物
の混合物を溶解した水溶液を用いて双方の元素を同時に
含有させてもよい。また上記製造方法の中でも、含浸法
を利用する方法は、アルミナ中へのランタンと７＜ Ｉ
Ｊウムとの含有が均一となり、更にアルミナへのランタ
ンとバリウムとの固溶が促進されやすく。For example, using an aqueous solution in which water-soluble compounds of lanthanum and barium such as lanthanum tetrahydride, lanthanum tifide, barium chloride, and barium nitrate are dissolved, alumina is impregnated with the aqueous solution, and then the alumina is dried. It is post-fired. In addition, after containing one element of lanthanum or barium, the other element may be included,
Alternatively, an aqueous solution containing a mixture of a water-soluble lanthanum compound and a water-soluble barium compound may be used to contain both elements at the same time. Also, among the above manufacturing methods, the method using the impregnation method is one in which lanthanum and 7<I
The content of lanthanum and barium becomes uniform, and the solid solution of lanthanum and barium in alumina is facilitated.
望ましい。desirable.
本発明において、対象とする担体の形状、構造は９粒状
体、ベレット状体あるいはハニカム構造体等がおる。ま
た母材としてのセラミックス多孔質体等からなる成形体
の表面に本発明にかかるアルミナにランタンとバリウム
とが含有してなるものを被覆して担体としてもよい。In the present invention, the shape and structure of the target carrier include nine grains, pellets, honeycomb structures, and the like. Alternatively, the surface of a molded body made of a ceramic porous body or the like as a base material may be coated with the alumina according to the present invention containing lanthanum and barium to form a carrier.
本発明の担体は、自動車排気浄化用触媒、燃焼触媒等の
担体として使用することができ、特に耐熱性に優れるの
で、高温燃焼用触媒のように１０００°Ｃ以上の高温下
に２いて使用される触媒の担体として有利である。The carrier of the present invention can be used as a carrier for automobile exhaust purification catalysts, combustion catalysts, etc., and has particularly excellent heat resistance, so it can be used at high temperatures of 1000°C or higher like high-temperature combustion catalysts. It is advantageous as a support for catalysts.
本発明の触媒担体は、１０００°Ｃ以上の高温下におい
て使用しても高い比表面積を維持し、かつｍｇ成分の分
散性に優れたものである。上記の高い比表面積を維持す
るのは、含有したランタンとバリウムの作用によるもの
であり、触媒成分の分散性が向上するのは、担体表面の
酸・塩基性が最適な状態にあることによるものと考えら
れる。The catalyst carrier of the present invention maintains a high specific surface area even when used at high temperatures of 1000° C. or higher, and has excellent dispersibility of mg components. The above-mentioned high specific surface area is maintained due to the action of the contained lanthanum and barium, and the dispersibility of the catalyst components is improved due to the optimal acidity and basicity of the carrier surface. it is conceivable that.
以下、本発明の詳細な説明する。 The present invention will be explained in detail below.
硝酸ランタンの水溶液を表面積が１６０ ｄ／９でろる
γ−アルミナに１表に示すランタン含有量となるような
開会において、含浸させた。その後。Gamma-alumina having a surface area of 160 d/9 was impregnated with an aqueous solution of lanthanum nitrate in a manner that resulted in the lanthanum content shown in Table 1. after that.
上記ｒ−アルミナを乾燥させ、水分を取り除いた後、６
００°Ｃ１大気中、３時間にて焼成し、ｒ−アルミナに
ワンタンを含有させた。After drying the above r-alumina and removing moisture,
It was fired for 3 hours at 00°C in the atmosphere to incorporate wonton into r-alumina.
訳に、硝酸バリウムの水溶液を用い１表に示すバリウム
含有量となるような開会にて、上記と同様にして）＜
１７ウムを含有させた。これにより、ランタンとバリウ
ムとが含有してなるｒ−アルミナを調製した。麺に該γ
−アルミナを１０００℃。In the same way as above, using an aqueous solution of barium nitrate and opening such that the barium content is as shown in Table 1)
It contained 17 um. In this way, r-alumina containing lanthanum and barium was prepared. γ in noodles
-Alumina at 1000℃.
空気中、３時間にて焼成して触媒担体を調製した。A catalyst carrier was prepared by firing in air for 3 hours.
なお表中で、バリウム含有量はランタンに対する含有量
（Ｂａ／Ｌａ；モル倍）により示しである。In the table, the barium content is expressed as the content (Ba/La; molar times) relative to lanthanum.
また、比較のため、ランタンとバリウムの含有量が本開
明の範囲外のものも上記と同様に調製した。For comparison, a sample containing lanthanum and barium outside the range of the present invention was also prepared in the same manner as above.
欠に、触媒担体として重要な因子である水抽出ｐＨ１比
表面積及び触媒成分の分散性について測定した。In particular, the water extraction pH 1 specific surface area and dispersibility of catalyst components, which are important factors for catalyst carriers, were measured.
（試験例１：水抽出ｐＨ）
蒸留水２０ｍ１に触媒担体Ｂｍｌを入れ、スターブによ
り６０分間攪拌した後、室温下においてｐＨメータによ
Ｆ）ｐｋＩを測定した。その結果を表に示す。(Test Example 1: Water Extraction pH) Catalyst carrier Bml was added to 20ml of distilled water, stirred for 60 minutes using a starburst, and then F) pkI was measured using a pH meter at room temperature. The results are shown in the table.
（試験例２：比表面積） ｍ謀担体を１２００”Ｃ，５時間焼成した後。(Test Example 2: Specific surface area) After firing the microcarrier at 1200"C for 5 hours.
ＢＥＴ法（Ｎｘ吸着法）により比表面積を測定した。The specific surface area was measured by the BET method (Nx adsorption method).
その結果を表に示す。The results are shown in the table.
（試験例３：触触媒分の分散性）
触媒成分の分散性は、自動車用三元触媒に使用されてい
る白金とロジウムを担持し、−酸化炭素（ＣＯ）の吸着
量より測定した。(Test Example 3: Dispersibility of Catalyst Component) The dispersibility of the catalyst component was measured from the amount of -carbon oxide (CO) adsorbed on a catalyst supporting platinum and rhodium used in three-way catalysts for automobiles.
白金とロジウムの担持は以下のように行なった。Platinum and rhodium were supported as follows.
まず触媒担体に所定濃度のジニトロジアミン白金（Ｐｔ
（ＮＨ，）、 （Ｎｏ宜）工）の硝酸酸性水＃液を含
浸させ、該触媒担体を乾燥した後、６００°Ｃ９大気中
、３時間にて焼成して白金を１１／１１担持した。次に
上記触媒担体に硝酸ロジウム（Ｒｈ（Ｎへ））の硝酸酸
性水溶液を含浸させ、該触媒担体を乾燥した後、６００
°Ｃ１大気中、３時間にて焼成してロジウムをＡ１９／
ｌ担持した。First, a predetermined concentration of dinitrodiamine platinum (Pt) is applied to a catalyst carrier.
The catalyst carrier was impregnated with an acidic aqueous solution of nitric acid (NH, ), (No. Next, the catalyst carrier was impregnated with a nitric acidic aqueous solution of rhodium nitrate (Rh(N)), and after drying the catalyst carrier,
Rhodium is made of A19/
l carried.
また、−酸化炭素の吸着量の測定は、「触媒誌」。In addition, the measurement of the adsorption amount of carbon oxide is described in "Catalyst Journal".
２８．４１（１９８６）（ＣＯパルス法による金属表面
積測定法）に記載の方法により行なった。28.41 (1986) (metal surface area measurement method using CO pulse method).
その結果を図に示す。なお１図の横軸はランタンに対す
るバリウムの１ｔ（Ｂα／、Ｌα）、また縦軸は表の試
料ＡＣ３の吸ｔ’ｌ量を１とした場合の吸着量（分散性
）の増加率（％）を示しである。The results are shown in the figure. The horizontal axis of Figure 1 is 1t of barium relative to lanthanum (Bα/, Lα), and the vertical axis is the increase rate (%) of adsorption amount (dispersibility) when the adsorption t'l amount of sample AC3 in the table is 1. ) is shown.
図より明らかなように、Ｂａ／Ｌａが本発明の範囲内で
あれば、触媒成分の分散性が向上していることが分る。As is clear from the figure, it can be seen that when Ba/La is within the range of the present invention, the dispersibility of the catalyst components is improved.
これは表の水抽出ｐＨに示すように担体表面の塩基度が
最適な状態にあるためと考えられる。This is considered to be because the basicity of the carrier surface is in an optimal state as shown in the water extraction pH in the table.
また表より明らかなように１本突施例の触媒担体は、比
較例のものに比べて高温下における比表面積の低下が小
さいことが分る。Furthermore, as is clear from the table, the catalyst carrier of the single protrusion example shows a smaller decrease in specific surface area at high temperatures than that of the comparative example.
図は実施例における触媒成分の分散性を示す線図である
。The figure is a diagram showing the dispersibility of catalyst components in Examples.
Claims (1)
ランタンと該ランタンに対して０．０１〜４０モル倍の
バリウムとを含有してなることを特徴とする触媒担体。A catalyst carrier characterized in that alumina contains lanthanum in an amount of 0.1 to 3 mol% relative to the alumina and barium in an amount of 0.01 to 40 times the lanthanum by mol.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61099152A JPS62254843A (en) | 1986-04-28 | 1986-04-28 | Catalyst carrier |
| DE19873713629 DE3713629A1 (en) | 1986-04-28 | 1987-04-23 | Catalyst composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61099152A JPS62254843A (en) | 1986-04-28 | 1986-04-28 | Catalyst carrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62254843A true JPS62254843A (en) | 1987-11-06 |
Family
ID=14239714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61099152A Pending JPS62254843A (en) | 1986-04-28 | 1986-04-28 | Catalyst carrier |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS62254843A (en) |
| DE (1) | DE3713629A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951956A (en) * | 1992-03-23 | 1999-09-14 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Catalyst for purifying exhaust gas and method for purifying exhaust gas |
| JP2009178675A (en) * | 2008-01-31 | 2009-08-13 | Toyota Central R&D Labs Inc | Catalyst for cleaning exhaust gas |
| US10906816B2 (en) | 2016-07-29 | 2021-02-02 | Sumitomo Chemical Company, Limited | Alumina and method for producing automotive catalyst using same |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5041407A (en) * | 1989-12-14 | 1991-08-20 | Allied-Signal Inc. | High-temperature three-way catalyst for treating automotive exhaust gases |
| US5116800A (en) * | 1990-12-11 | 1992-05-26 | Allied-Signal Inc. | High durability and exhuast catalyst with low hydrogen sulfide emissions |
-
1986
- 1986-04-28 JP JP61099152A patent/JPS62254843A/en active Pending
-
1987
- 1987-04-23 DE DE19873713629 patent/DE3713629A1/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951956A (en) * | 1992-03-23 | 1999-09-14 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Catalyst for purifying exhaust gas and method for purifying exhaust gas |
| JP2009178675A (en) * | 2008-01-31 | 2009-08-13 | Toyota Central R&D Labs Inc | Catalyst for cleaning exhaust gas |
| US10906816B2 (en) | 2016-07-29 | 2021-02-02 | Sumitomo Chemical Company, Limited | Alumina and method for producing automotive catalyst using same |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3713629A1 (en) | 1987-10-29 |
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