特别是，对于在一个过程中使用的质量传递的限制的过程，或氮氧化物的选择性催化还原（SCR）的蜂窝体单块的结构，其包括多个单元壁限定多个多边形信道，多个 单元壁和通道沿着从结构的入口端到出口端的共同方向平行于流体流动方向延伸。 在多边形通道的水平方向横截面是具有凸起的细长多边形，其中不小于50％是90 dochogwa该凸多边形之间的机壳有两个相邻的壁的形状，当超过1.5小室直径比（L / L）。

In particular, the honeycomb monolith structures for use in a process for the selective catalytic reduction (SCR) of the mass transfer limited processes, or nitrogen oxides, comprising a plurality of cell walls defining a plurality of polygonal channel, a plurality of the cell walls and the channels extend from the inlet end of the structure parallel along a common direction of the exit end in the fluid flow direction. Cross-section in the horizontal direction of the polygon channel has the shape of a convex elongate polygon, in which not less than 50% are more than 90 of the cabinet between the convex polygon two adjacent walls, the cell diameter ratio _(L L / L _S) is 1.5 greater than to be.