Catalyst shaped body

A catalyst shaped body, comprising:

• a column body extending in a longitudinal direction, the column body having a cross section perpendicular to the longitudinal direction;
• wherein the cross section has a central through hole, at least four first corners (2) and first recesses (3) with the same number as the first corners;
• the at least four first corners are arranged at the same angular intervals along a circumferential direction to define a first circumscribed circle of an outer contour of the catalyst shaped body, each first corner is tangent to the first circumscribed circle, and the at least four first corners are rotationally symmetric with respect to a center of the first circumscribed circle;
• the first corners (2) and the first recesses are alternately arranged in the circumferential direction, the first corners (2) and the first recesses (3) have different geometric shapes, the first corners (2) are an outwardly convex part of a first ellipse with a ratio of a major axis to a minor axis greater than 1.2, and the first recesses (3) are an inwardly concave arc tangent to two adjacent first corners (2), so as to avoid bite between the first corners (2) and/or the first recesses (3) of the catalyst shaped body and the first recesses (3) and/or the first corners (2) of adjacent catalyst shaped bodies.