摘要:
The invention relates to a catalyst carrier for exhaust gas purification catalyst which contains a metal phosphate containing Zr, and it provides a new catalyst carrier which exhibits excellent NOx purification performance in a high temperature region. The invention proposes a carrier for exhaust gas purification catalyst containing a metal phosphate which has a NASICON type structure and contains Zr.
摘要:
Provided is a carrier for an exhaust gas purification catalyst containing aluminum borate particles having a peak (pore peak) exhibiting the highest intensity in a void volume diameter range of from 20 nm to 100 nm in a logarithmic differential void volume distribution measured using a mercury intrusion porosimeter, in order to provide a new catalyst support capable of effectively suppressing a decrease in catalytic performance caused by sulfur (S) component contained in the exhaust gas, in the case of supporting Pd as a catalytically active component.
摘要:
The invention provides an exhaust gas purification catalyst carrier which includes a phosphate salt represented by formula: MPO 4 (wherein M represents Y, La, or Al) or a zirconium phosphate represented by formula ZrP 2 O 7 ; an exhaust gas purification catalyst containing a noble metal at least containing Rh and supported on the carrier; and an exhaust gas purification catalyst product having a catalyst support made of a ceramic or metallic material, and a layer of the exhaust gas purification catalyst, the layer being supported on the catalyst support.
摘要翻译:本发明提供一种废气净化催化剂载体,其包含由式MPO 4(其中M表示Y,La或Al)或由式ZrP 2 O 7表示的磷酸锆代表的磷酸盐; 含有至少含有Rh并载持在载体上的贵金属的废气净化催化剂; 以及具有由陶瓷或金属材料制成的催化剂载体的废气净化催化剂产物和排出气体净化催化剂层,所述层被负载在催化剂载体上。
摘要:
A catalyst powder according to the present invention is a catalyst powder that includes: a core portion that contains ceria and zirconia; and a surface layer portion that is located on the core portion and contains ceria and zirconia. The ratio (M 2 /M 1 ) is 0.30 or more and 0.95 or less, the ratio (M 2 /M 1 ) being the ratio of a mole fraction M 2 (mol%) of cerium in the surface layer portion measured using X-ray photoelectron spectroscopy to a mole fraction M 1 (mol%) of cerium in the entire powder. It is preferable that the ratio (M 4/2 /M 3/1 ) between M 3/1 and M 4 / 2 is 1.1 or more and 5.0 or less, wherein M 3/1 (= M 3 /M 1 ) represents the ratio between a mole fraction M 3 (mol%) of zirconium in the entire powder and a mole fraction M 1 (mol%) of cerium in the entirety of the powder, and M 4 / 2 (= M 4 /M 2 ) represents the ratio between a mole fraction M 4 (mol%) of zirconium measured using X-ray photoelectron spectroscopy and a mole fraction M 2 (mol%) of cerium measured using X-ray photoelectron spectroscopy.
摘要:
In an exhaust gas purification catalyst system for use in an automobile including an exhaust gas purification catalyst product disposed in both a front section and a rear section, the exhaust gas purification catalyst product of the front section has a layered catalyst including a lower layer which contains aluminum borate.
摘要:
The invention relates to a catalyst composition using other metals different from precious metals as a catalytically active component and is to propose a novel catalyst composition for exhaust gas purification which has excellent catalytic activity, in particular, excellent treatment activity of HC even after a thermal durability treatment. The invention is to propose a catalyst composition for exhaust gas purification comprising catalyst particles having a constitution in which Cu and a transition metal A including at least one of Cr, Fe, Mn, Co, Ni, Zr, and Ag are supported on ceria (CeO 2 ) particles and a catalyst using the same.
摘要:
A catalyst for exhaust gas purification includes a carrier and a platinum group element supported on the carrier. The carrier includes a modified aluminum borate which contains an aluminum borate and at least one of oxides of an element selected from the group consisting of Zr, Si, Fe, and Ti. The modified aluminum borate contains the oxide in a concentration of 0.06% to 18% by mass relative to the mass of the modified aluminum borate.
摘要:
A catalyst for exhaust gas purification includes a carrier and a platinum group element supported on the carrier. The carrier includes a modified aluminum borate which contains an aluminum borate and at least one of oxides of an element selected from the group consisting of Zr, Si, Fe, and Ti. The modified aluminum borate contains the oxide in a concentration of 0.06% to 18% by mass relative to the mass of the modified aluminum borate.