Patent
Production of catalyst for cleaning exhaust gas
Masaki Funabiki,Yukio Ozaki +1 more
TLDR
In this article, a slurry contg. activated alumina contg, selenium oxide and barium nitrate, and/or barium formate is prepared for cleaning exhaust gas by sticking the slurry on the carrier having the integrated structure and thereafter calcining it.Abstract:
PURPOSE: To increase high temp. durability of a catalyst by preparing a slurry by adding activated alumina contg. the platinum group element, selenium oxide and barium nitrate, etc., sticking the slurry on a carrier having an integrated structure and thereafter calcining it. CONSTITUTION: The slurry contg. activated alumina contg. platinum group element, selenium oxide and barium nitrate, and/or barium formate is prepared. The catalyst for cleaning exhaust gas is produced by sticking the slurry on the carrier having the integrated structure and thereafter calcining it. Said carrier consists of refractory metal oxide or durable metal and its monolithic or three-dimensional network structure is preferable as the form of the carrier. Selenium oxide content is preferably 10W200g/1l catalyst obtd. COPYRIGHT: (C)1988,JPO&Japioread more
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Patent
Exhaust gas purifying catalyst
TL;DR: An exhaust gas-purifying catalyst includes a substrate, and a catalytic layer formed on the substrate using slurry containing a precious metal, alumina, an oxygen storage material and a sulfate of an alkaline-earth metal having an average particle diameter falling within a range of 0.01 to 0.70 μm, the average particle size being obtained by observation using a scanning electron microscope as mentioned in this paper.
Patent
Process for purifying exhaust gases
TL;DR: In this article, a support for purifying carbon monoxide, hydrocarbons and nitrogen oxides in exhaust gases at the stoichiometric point or in oxygen-rich atmospheres is presented.
Patent
Exhaust gas purification catalyst
Akemi Satou,Masahiko Takeuchi,Keizo Hiraku,Yusuke Kawamura,Takahiko Fujiwara,Tadashi Suzuki,Naoki Takahashi +6 more
TL;DR: An exhaust gas purification catalyst includes a lower catalyst layer that contains a ceria-zirconia mixed oxide having 50 to 70 mass% of CeO 2 and 5 mass% or more of Pr 2 O 3 and carries at least one of Pt and Pd as discussed by the authors.
Patent
Catalyst for purifying exhaust gas
TL;DR: A catalyst for purifying an exhaust gas to remove nitrogen oxides, carbon monoxide and hydrocarbons from an oxygen-rich exhaust gas is defined in this paper, where a zeolite having an SiO2/Al2O3 mole ratio of at least 15 is used.
Patent
Catalyst for purifying exhaust gases and process for purifying exhaust gases
Hiromasa Suzuki,Koji Yokota,Tomoko Iijima,Tadashi K K Toyota Chuo Suzuki,Koichi Kasahara,Syuji Tateishi +5 more
TL;DR: In this article, a process for purifying an exhaust gas comprising carbon monoxide, hydrocarbons, nitrogen oxides, and sulfur oxides by periodically adjusting exhaust gas conditions from lean-burn to fuel-rich and by using a catalyst comprising an alumina support with lithium dissolved therein to form a solid solution is presented.