110 results about "Pore system" patented technology

The invention relates to a method for scrubbing effluent gases from a sintering process for ores in metal production, in which ore material is sintered with a solid fuel by combustion of the solid and passing through a carbonisation process, wherein at least the pollutants SOx and / or HCl and NOx are reduced or essentially removed. The sinter effluent gas is introduced into a moving bed reactor (50) from below through a lower and an upper layer (54B; 54A) of adsorption and / or absorption agent which is already charged with NOx and SOx and / or HCl, wherein at least the majority of the SOx and / or HCI components from the sinter effluent gas are absorbed in the pore system of the adsorption and / or absorption agent charged with NOx. The sinter effluent gas purified of the majority of the SOx and / or HCI components is homogeneously mixed with an ammoniacal compound such as ammonia or urea and admitted from below into the upper layer of adsorption and / or absorption agent already charged with NOx and small amounts of SOx and / or HCl from below through an upper horizontal gas influx and bulk material outlet floor (52A) of the moving bed reactor. On flowing through the upper layer (54A) at least the majority of NOx components from the sinter effluent gas is absorbed on the surface of the absorption / adsorption agent charged with NOx or N2 and small amounts of SOx and / or HCl. Fresh and / or regenerated adsorption / absorption agent is introduced via a bulk material distribution floor (50C) at the upper end of the moving bed reactor and continuously moves through the upper and lower layer of the whole moving bed reactor wherein firstly Nox and N2 and steam are absorbed on the surface thereof and then SOx and / or HCl are absorbed in the pore system thereof.

A method of protecting steel in concrete is disclosed. It consists of connecting the steel (6) to a discrete sacrificial anode assembly (7) comprising a base metal (1), a relatively small quantity of catalytic activating agent in contact with the base metal and a substantially inert porous layer (3) that surrounds the base metal and catalytic activating agent. The inert porous layer efficiently maintains a sustainable concentration gradient of the catalytic activating agent between the base metal and the surrounding environment as a result of the electric field across this layer. The preferred porous layer comprises a material that exhibits a net repulsion of negative ions from its pore system and the preferred catalytic activating agent comprises doubly charged sulphate ions as small electric fields maintain very high concentration gradients of these ions resulting in high concentrations at the base metal surface and insignificant concentrations at the assembly periphery.