Title:
NOX OCCLUSION REDUCTION TYPE CATALYST, PRODUCTION METHOD THEREFOR, AND NOX REMOVAL METHOD USING THE SAME
Document Type and Number:
Japanese Patent JP2016107260
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a NOx occlusion reduction type catalyst having large occlusion amount of NOx and capable of exhibiting excellent NOx removal performance.SOLUTION: There is provided the NOx occlusion reduction type catalyst that comprises: a carrier containing compound oxide including at least zinc and aluminum; and an active metal and NOx occlusion material carried on the carrier. The compound oxide is represented by composition formula:ZnMgsq.AlO, where x represents the number of 0.02 to 0.70, y represents the number of 0 to 0.60, sum of x and y satisfies a condition of 0.02 to 0.70 and sq represents a defect site of zinc and aluminum. A value of a ratio of a main peak area of the Znsq.AlO(A) to the total of the main peak area of ZnMgsq.AlO(B) and the main peak area of MgO (C), (A/[A+B+C]) in diffraction peaks measured by an X-ray diffraction pattern using a CuKα ray obtained by an X-ray diffraction measurement of the carrier is 0.6 or more, the active metal is a noble metal and the NOx occlusion material contains at least barium or potassium.SELECTED DRAWING: None
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Inventors:
HAMAGUCHI TAKESHI
KATO YUKIKAZU
TANAKA TOSHIYUKI
KATO YUKIKAZU
TANAKA TOSHIYUKI
Application Number:
JP2015226742A
Publication Date:
June 20, 2016
Filing Date:
November 19, 2015
Export Citation:
Assignee:
TOYOTA CENTRAL RES & DEV
International Classes:
B01J23/60; B01D53/94; B01J23/06; B01J32/00; B01J37/02; B01J37/08; F01N3/08; F01N3/10
Attorney, Agent or Firm:
Patent Business Corporation St. Crest International Patent Office