Ibiden Company Limited

Ken Yoshimura

Masafumi Kunieda

Toshiyuki Miyashita

Kazushige Ohno

Takahiko Ido

Shinnosuke Goto

A honeycomb structure includes at least one honeycomb unit having a plurality of through holes defined by partition walls extending along a longitudinal direction of the honeycomb unit. The honeycomb unit includes zeolite, an inorganic binder, and a noble metal catalyst. The zeolite is ion-exchanged with Cu and/or Fe to reduce NOon the zeolite by providing ammonia or its precursor. The noble metal catalyst is supported only in a region of the honeycomb unit. The region extends from one end portion of the honeycomb unit in the longitudinal direction over approximately 1.5% or more to approximately 20% or less of an overall length of the honeycomb unit in the longitudinal direction. The region is provided on a downstream side of the honeycomb unit in a direction in which an exhaust gas is configured to flow through the honeycomb unit.

Honeycomb structure

A honeycomb structure includes at least one honeycomb unit. The at least one honeycomb unit has a plurality of through holes defined by partition walls along a longitudinal direction of the honeycomb unit. The honeycomb unit includes zeolite, an inorganic binder, and a noble metal catalyst. The noble metal catalyst is supported in a region of the honeycomb unit. The region extends from one end portion of the honeycomb unit in the longitudinal direction over approximately 1.5% or more to approximately 20% or less of an overall length of the honeycomb unit in the longitudinal direction.

Honeycomb structure and exhaust gas converter

A honeycomb structure includes honeycomb units. Each of the honeycomb units has a longitudinal direction and includes inorganic particles, an inorganic binder, and cell walls defining cells extending along the longitudinal direction from one end face to another end face. The honeycomb units are bonded together via an adhesive such that each longitudinal direction is substantially in parallel. An amount of ammonia desorbed per unit mass of the honeycomb units is about 5 to about 100 times greater than an amount of ammonia desorbed per unit mass of the adhesive. The amount of ammonia desorbed per unit mass of the honeycomb units and the amount of ammonia desorbed per unit mass of the adhesive are measured by an NH-TPD method.

Growing community of inventors

Ibi-gun, Japan

Ken Yoshimura