Sumitomo Chemical Company, Limited

Tatsuro Kawauchi

Teruo Komori

Hajime Yoshino

Kentaro Iwasaki

The columnar honeycomb structureextending along a central axis CL, including a first end surfaceand a second end surface, and a partition wallforming a plurality of first flow passages Ra and a plurality of second flow passages Rb, in which the first flow passages Ra are opened at the side of the first end surfaceand plugged at the side of the second end surface, the second flow passages Rb are plugged at the side of the first end surfaceand opened at the side of the second end surface, and the honeycomb structure includes a circular row W formed by arranging the second flow passages Rb adjoining and partitioned by the partition wallin a circular pattern.

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Niihama, Japan

Tatsuro Kawauchi