Use of a concrete-based element for treatment of gases and volatile compounds

摘要

A method includes using an element which includes a monoblock concrete body with a volume greater than 1 L and a surface porosity greater than 8%, which body includes in the body and/or on a surface thereof a compound having a BET specific surface greater than 100 m2/g, and which element does not include a photocatalytic agent, to absorb from the atmosphere a gas selected from the group consisting of nitrogen oxides, carbon oxides, sulphur oxides, and ozone, or a volatile organic compound.

主权项

1. A method comprising using an element which comprises a monoblock concrete body with a volume greater than 1 L and a surface porosity greater than 8%, which body comprises in the body and/or on a surface thereof a compound having a BET specific surface greater than 100 m2/g, and which element does not comprise a photocatalytic agent, to adsorb from the atmosphere nitrogen dioxide, wherein the compound is selected from the group consisting of active carbon, modified active carbon, silica gel, pyrogenic silica, diatomite, zeolite and alumina and porous hybrid solids, and wherein the adsorption rate of nitrogen dioxide per unit surface is greater than 0.5 ppbv/cm2.