JPWO2010008073A1 - 排ガス浄化用触媒 - Google Patents
排ガス浄化用触媒 Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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Abstract
Description
排ガス浄化用触媒1は、基材10と、基材10上に形成された触媒層20とを含んでいる。
このようにして、図1に示す排ガス浄化用触媒1を得る。
図2に示す排ガス浄化用触媒1は、触媒層20が、基材10上に形成された第1触媒層21と、その上に形成された第2触媒層22との2層からなること以外は、図1に示す排ガス浄化用触媒1と同様の構成を有している。
まず、50質量%のセリアと30質量%のジルコニアと20質量%の酸化プラセオジム(Pr6O11)とからなる複合酸化物を準備した。以下、この複合酸化物を「CZP材A」と呼ぶ。
66.7gのCZP材Aと53.3gのアルミナと1.5gのパラジウムを含んだ硝酸パラジウム溶液とを混合して、スラリーを調製した。以下、このスラリーを「スラリーS3」と呼ぶ。
0.7gのCZP材Aと119.3gのアルミナと1.5gのパラジウムを含んだ硝酸パラジウム溶液とを混合して、スラリーを調製した。以下、このスラリーを「スラリーS5」と呼ぶ。
30質量%のセリアと20質量%のジルコニアと50質量%のPr6O11とからなる複合酸化物を準備した。以下、この複合酸化物を「CZP材C」と呼ぶ。
100gのゼオライトを含んだスラリーを調製した。以下、このスラリーを「スラリーS9」と呼ぶ。
3.3gのCZP材Aと116.7gのアルミナと1.5gのパラジウムを含んだ硝酸パラジウム溶液と12gの硫酸バリウムと6gの炭酸ランタンとを混合して、スラリーを調製した。以下、このスラリーを「スラリーS10」と呼ぶ。
セリアとジルコニアとを5:4の質量比で含んだ複合酸化物を準備した。以下、この複合酸化物を「CZ材E」と呼ぶ。
0.3gのCZP材Aと119.7gのアルミナと1.5gのパラジウムを含んだ硝酸パラジウム溶液とを混合して、スラリーを調製した。以下、このスラリーを「スラリーS14」と呼ぶ。
81.2gのCZP材Cと38.8gのアルミナと1.5gのパラジウムを含んだ硝酸パラジウム溶液とを混合して、スラリーを調製した。以下、このスラリーを「スラリーS16」と呼ぶ。
60gのCZ材Eと60gのアルミナと1.5gのパラジウムを含んだ硝酸パラジウム溶液とを混合して、スラリーを調製した。以下、このスラリーを「スラリーS18」と呼ぶ。
50質量%のセリアと30質量%のジルコニアと20質量%のNd2O3とからなる複合酸化物を準備した。以下、この複合酸化物を「CZN材G」と呼ぶ。
50質量%のセリアと30質量%のジルコニアと20質量%のY2O3とからなる複合酸化物を準備した。以下、この複合酸化物を「CZY材I」と呼ぶ。
50質量%のセリアと30質量%のジルコニアと20質量%のLa2O3とからなる複合酸化物を準備した。以下、この複合酸化物を「CZL材K」と呼ぶ。
45質量%のセリアと25質量%のジルコニアと30質量%のPr6O11とからなる複合酸化物を準備した。以下、この複合酸化物を「CZP材M」と呼ぶ。
55質量%のセリアと42質量%のジルコニアと3質量%のPr6O11とからなる複合酸化物を準備した。以下、この複合酸化物を「CZP材O」と呼ぶ。
触媒C1乃至C15について、排ガス浄化性能の評価を行った。
Claims (7)
- 基材と、前記基材上に形成され、貴金属とプラセオジムとを含有している触媒層とを具備した排ガス浄化用触媒。
- 前記プラセオジムの含量は、前記基材の単位容積当り、Pr6O11換算で0.2g/L乃至60g/Lである請求項1に記載の排ガス浄化用触媒。
- 前記プラセオジムの含量は、前記基材の単位容積当り、Pr6O11換算で1.0g/L乃至20g/Lである請求項1に記載の排ガス浄化用触媒。
- 前記基材と前記触媒層との間に設けられ且つゼオライトを含有した層を更に具備した請求項2又は3に記載の排ガス浄化用触媒。
- 前記触媒層はバリウム及びランタンを更に含有している請求項2乃至4の何れか1項に記載の排ガス浄化用触媒。
- 前記触媒層は、プラセオジム酸化物と前記プラセオジム酸化物以外の酸化物との複合酸化物を含んでいる請求項2乃至5の何れか1項に記載の排ガス浄化用触媒。
- 前記複合酸化物はセリアとジルコニアとプラセオジム酸化物との複合酸化物であり、前記複合酸化物に占める前記プラセオジム酸化物の質量比は3質量%乃至30質量%の範囲内である請求項6に記載の排ガス浄化用触媒。
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JP2008186164 | 2008-07-17 | ||
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JP5901647B2 (ja) * | 2011-10-31 | 2016-04-13 | エヌ・イーケムキャット株式会社 | 排気ガス浄化用触媒 |
EP2826560A4 (en) * | 2012-03-14 | 2015-12-09 | N E Chemcat Corp | CATALYST COMPOSITION FOR EMISSION CONTROL AND CATALYST FOR VEHICLE EXHAUST PURIFICATION |
JP5576420B2 (ja) * | 2012-03-21 | 2014-08-20 | トヨタ自動車株式会社 | 排ガス浄化触媒 |
KR101459436B1 (ko) * | 2012-12-17 | 2014-11-07 | 현대자동차 주식회사 | 내연 기관용 가스 정화 촉매 |
JP2015006638A (ja) * | 2013-06-25 | 2015-01-15 | 川崎重工業株式会社 | 排ガス浄化触媒及びその製造方法 |
EP3539648A4 (en) * | 2016-11-11 | 2020-06-24 | N.E. Chemcat Corporation | THREE-WAY CATALYST FOR EXHAUST GAS PURIFICATION, METHOD FOR PRODUCING IT AND EXHAUST GAS PURIFICATION CATALYST |
JP6769862B2 (ja) * | 2016-12-26 | 2020-10-14 | エヌ・イーケムキャット株式会社 | 排ガス浄化用三元触媒及びその製造方法、並びに排ガス浄化用触媒コンバータ |
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Also Published As
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JP2015110225A (ja) | 2015-06-18 |
US8680004B2 (en) | 2014-03-25 |
WO2010008073A1 (ja) | 2010-01-21 |
EP2301662A1 (en) | 2011-03-30 |
US20110111949A1 (en) | 2011-05-12 |
CN102089076A (zh) | 2011-06-08 |
JP5965982B2 (ja) | 2016-08-10 |
EP2301662A4 (en) | 2011-12-21 |
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