Honeycomb body with adsorber material, in particular, for a hydrocarbon trap

An exhaust emission control system of a motor vehicle, comprising:

• at least one three-way catalytic converter;
• and
• a hydrocarbon trap honeycomb body disposed upstream of said at least one three-way catalytic converter, said honeycomb body having:
• separating walls defining channels for channelling a gas;
• and
• an adsorber material disposed on at least part of said separating walls;
• said separating walls being made from a material and having a thickness, said material and said thickness of said separating walls defining a specific thermal capacity in relation to a unit of surface area;
• said channels having an inner cross-sectional shape and being separated at least partly from one another by said separating walls, said inner cross-sectional shape and a number of said channels defining a specific geometrical surface area, measured in square meters per liter (m2/l), of said honeycomb body, said geometrical surface area divided by a surface-area-related specific thermal capacity, measured in kilojoules per Kelvin per square meter (kJ/(K·m2)), at room temperature, as well as without adsorber material and without any other coatings, being at least equal to 37.5 meters·Kelvin per Joule (m·K/J).

In an exhaust emission control system of a motor vehicle having at least one three-way catalytic converter, a honeycomb comprising:

• a hydrocarbon trap honeycomb body disposed upstream of the at least one three-way catalytic converter, said hydrocarbon trap honeycomb body having:
• separating walls defining channels for channelling a gas;
• and
• an adsorber material disposed on at least part of said separating walls;
• said separating walls being made from a material and having a thickness, said material and said thickness of said separating walls defining a specific thermal capacity in relation to a unit of surface area;
• said channels having an inner cross-sectional shape and being separated at least partly from one another by said separating walls, said inner cross-sectional shape and a number of said channels defining a specific geometrical surface area, measured in square meters per liter (m2/l) of said honeycomb body, said geometrical surface area divided by a surface-area-related specific thermal capacity, measured in kilojoules per Kelvin per square meter (kJ/K·m2)), at room temperature, as well as without adsorber material and without any other coatings, being at least equal to 37.5 meters·Kelvin per Joule (m·K/J).