Patent HU-0700508-A2 (HU)
Title: Appliance for carbon catena development and process for neutralisation of dangerous wastes
Inventor: HARANGI ARPAD
IPC: B01J23/78
Filed: 2007-08-03
Abstract: The subject of the invention relates to a catalytic pyrolysis device primarily for the neutralisation of dangerous combustion products and waste materials, the elimination of flue gases and the utilisation of complex carbon chains, which contains a housing body enclosing a reaction space and an active material coating covering at least part of the inner side of the housing body, where the housing body is a ceramic material with a solid core and a porous shell that has depressions suitable to receive the particles of the active material coating at least on the boundary surface of the core facing the reaction space, the active material coating has a nickel base containing magnesium. The characteristic feature of the device is that the core (21) of the housing body (20) is from a protoenstatite ceramic stabilised with a sintered glassy phase, and the porous shell (22) at least partially covering the core (21) is from 0.6-1.1 mm thick magnesium silicate with added alpha-corundum, and the active material coating (23) located on the porous external surface (22a) of the shell (22) is Ni-Mg oxide produced using heat treatment from a Ni-Mg double salt and, in a given case, contains Ni-Si components. The subject of the invention also relates to the production of the housing body structure of a catalytic pyrolysis device primarily suitable for to the neutralisation of dangerous combustion products and waste materials, the destruction of flue gases and the utilisation of complex carbon chains, during which we form a core material, the formed core material is subject to heat treatment, following this it is coated with a shell former, then is again subjected to heat treatment, following this the shell is given an active material coating, and finally is subjected to a further heat treatment. The characteristic feature of the invention is that for the raw material for the production of the solid core (21) we use 50-65 mass% finely ground talcum powder, 15- 35 mass% talcum powder fired at 1200+50°C and/or talcum powder, 4-7 mass% magnesium carbonate and 5-9 mass% barium carbonate, and, in a given case, 0.1-0.2 mass% rutile titanium dioxide, then the raw material is shaped by pressing and is fired at 750±10 °C, then as a porous shell (22) by immersion and/or spraying we apply a fine ground material slurry to the boundary surface (21a) of the solid core (21) produced in this way consisting of 6-14 mass% fine grain calcinated alpha corundum, 4-9 mass% white burning plastic fine clay, 55-68 mass% raw talcum and 22-28 mass% talcum powder fired at 1200+50 and 3-12 mass% paper industry grade pulped cellulose fibre, 0.1-0.2 mass% ammonium lignosulphate and 0.2-0.8 mass% tri-methylcellulose with a molar mass of between 1000-5000, we apply a material mixture with a density of 1250-1300 g/l and we continue thickening the porous shell (22) until the theoretical post-firing thickness of the porous shell (22) reaches 0.6-1.1 mm, following creating the porous shell (22) the housing body (20) is dried and fired at 1200±10 °C, then the housing body (20) with its solid core (21) and porous shell (22) is dipped once or several times in a Ni-Mg double salt melt and then any surplus is removed from the housing body (20) an in this way an active material coating is applied to the housing body (20), then finally the housing body (20) with the applied active material coating (23) is heat- treated at 600±10 °C.