Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
HONEYCOMB STRUCTURE, AND CATALYTIC CONVERTER FOR AUTOMOBILE
PROBLEM TO BE SOLVED: To provide a honeycomb structure that contains as a main component a ceria-zirconia composite oxide to enhance reliability of a catalytic converter for an automobile, gives sufficient cleaning performance using a small amount of a catalyst, and maintains mechanical strength.SOLUTION: A honeycomb structure 1 is made of raw material grains having a ceria-zirconia composite oxide as a main component and a material containing an inorganic binder to bond the raw material grains, and includes many cells 12 partitioned by cell walls 11. The honeycomb structure 1 is composed of at least two regions 13, 14 having each a different macro porosity formed by grain boundary defects in the cell extending direction X of the cell walls 11. A region A of a relatively high macro porosity is located at one end side of the cell walls 11, while a region B of a relatively low macro porosity is located at the other end side.SELECTED DRAWING: Figure 1
【課題】自動車用触媒コンバータの信頼性を向上させるセリア−ジルコニア複合酸化物を主成分とし、少ない触媒使用量で十分な浄化性能が得られ、機械的強度を維持できるハニカム構造体の提供。【解決手段】セリア−ジルコニア複合酸化物を主成分とする原料粒子と、原料粒子同士を接合する無機バインダを含む材料で構成され、セル壁１１で区画された多数のセル１２を有するハニカム構造体１は、セル壁１１のセル伸長方向Ｘにおいて、粒界欠損により形成されるマクロ気孔率が異なる少なくとも２つの領域１３、１４からなり、セル壁１１の一方の端部側に、相対的にマクロ気孔率が大きい領域Ａを備え、他方の端部側に、相対的にマクロ気孔率が小さい領域Ｂを備えるハニカム構造体１。【選択図】図１
HONEYCOMB STRUCTURE, AND CATALYTIC CONVERTER FOR AUTOMOBILE
PROBLEM TO BE SOLVED: To provide a honeycomb structure that contains as a main component a ceria-zirconia composite oxide to enhance reliability of a catalytic converter for an automobile, gives sufficient cleaning performance using a small amount of a catalyst, and maintains mechanical strength.SOLUTION: A honeycomb structure 1 is made of raw material grains having a ceria-zirconia composite oxide as a main component and a material containing an inorganic binder to bond the raw material grains, and includes many cells 12 partitioned by cell walls 11. The honeycomb structure 1 is composed of at least two regions 13, 14 having each a different macro porosity formed by grain boundary defects in the cell extending direction X of the cell walls 11. A region A of a relatively high macro porosity is located at one end side of the cell walls 11, while a region B of a relatively low macro porosity is located at the other end side.SELECTED DRAWING: Figure 1
【課題】自動車用触媒コンバータの信頼性を向上させるセリア−ジルコニア複合酸化物を主成分とし、少ない触媒使用量で十分な浄化性能が得られ、機械的強度を維持できるハニカム構造体の提供。【解決手段】セリア−ジルコニア複合酸化物を主成分とする原料粒子と、原料粒子同士を接合する無機バインダを含む材料で構成され、セル壁１１で区画された多数のセル１２を有するハニカム構造体１は、セル壁１１のセル伸長方向Ｘにおいて、粒界欠損により形成されるマクロ気孔率が異なる少なくとも２つの領域１３、１４からなり、セル壁１１の一方の端部側に、相対的にマクロ気孔率が大きい領域Ａを備え、他方の端部側に、相対的にマクロ気孔率が小さい領域Ｂを備えるハニカム構造体１。【選択図】図１
HONEYCOMB STRUCTURE, AND CATALYTIC CONVERTER FOR AUTOMOBILE
ハニカム構造体及び自動車用触媒コンバータ
TAKAYAMA YASUSHI (Autor:in) / KADOTA YOICHI (Autor:in) / NAKANISHI TOMOHIKO (Autor:in)
12.01.2017
Patent
Elektronische Ressource
Japanisch
IPC:
B01J
Chemische oder physikalische Verfahren, z.B. Katalyse oder Kolloidchemie
,
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
/
B01D
SEPARATION
,
Trennen
/
C04B
Kalk
,
LIME
/
F01N
GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL
,
Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein
Honeycomb structure, honeycomb catalytic body and manufacturing method of the same
| Europäisches Patentamt | 2017