Abstract: A honeycomb regenerator for recovering waste heat from exhaust gas, comprises a stacked assembly including at least one first honeycomb body and at least one second honeycomb body stacked thereon, the first honeycomb body being formed of an anti-corrosive material, and the at least one second honeycomb body being formed of a material having a main phase of cordierite. The stacked assembly has an inlet for hot gas and an inlet for cold gas, such that the cold gas flows along a direction opposite the hot gas. Further, the at least one second honeycomb body is provided downstream of the at least one first honeycomb body along a gas flow direction of the hot gas. Accordingly, the at least one first honeycomb body receives the hot gas during flow thereof, while the at least one second honeycomb body receives the cold gas during flow thereof.

Abstract: A curved honeycomb structural body having a number of through holes extending through the structural body along a direction in which the honeycomb structural body is curved. Thicknesses of interior walls defining through holes are set larger on a radially outer side of the curved portion than on a radially inner side thereof.

Abstract: A honeycomb structural body including an outermost peripheral wall, and partition walls axially defining a number of through holes inside the outermost peripheral wall. The honeycomb structural body is bent around at least one line located orthogonally to an extending direction of the through holes, wherein L1/L2.gtoreq.0.8, and R.gtoreq.100 mm, in which L1 is an axial length of a longest through hole among through holes located in an outer portion of the honeycomb structural body, L2 is an axial length of a shortest through hole among through holes located in an inner portion of the honeycomb structural body, and R is a radius of curvature of a center line of the honeycomb structural body defined by continuously connecting centroids of said outermost peripheral wall of the honeycomb structural body in respective planes orthogonal to the extending direction of the through holes thereof.

Abstract: A curved honeycomb structural body having a number of through holes penetrating along a direction in which the honeycomb structural body is curved. Pitches between adjacent interior partition walls defining through holes are set smaller on a radially outer side of a curved portion than on a radially inner side thereof.