摘要:
Calcium-iron oxide composite particles of the present invention have a BET specific surface area of 0.1 to 100 m 2 /g and contain iron atoms in an amount of 1 to 500 moles based on 100 moles of calcium atoms, not less than 50 % of iron atoms, based on the total amount of iron atom contained in said calcium-iron oxide composite particles, are bonded with one or more calcium atoms to form a calcium-iron ferrite phase. A hydrogen chloride-scavenger comprising the calcium-iron oxide composite particles, is capable of effectively capturing harmful hydrogen chloride generated by thermal decomposition or combustion of chorine-containing resin molded products upon fire or incineration thereof, and fixing the hydrogen chloride as stable calcium chloride or the like.
摘要:
A catalyst for inhibiting the generation of dioxin, which catalyst comprises iron oxide and/or iron oxide hydroxide particles having:
an average particle size of 0.01 to 2.0 µm, a BET specific surface area of 0.2 to 200 m 2 /g, a phosphorus content of not more than 0.02 % by weight, a sulfur content of not more than 0.6 % by weight and a sodium content of not more than 0.5 % by weight; and the catalyst being capable of converting not less than 15% of carbon monoxide into carbon dioxide when 2.8 x 10 -4 mol of iron oxide particles obtained by heat-treating the catalyst in air at a temperature of 800°C for 15 minutes are instantaneously contacted with 6.1 x 10 -7 mol of carbon monoxide at 250°C and a space velocity (SV) of 42,400 h -1 in an inert gas atmosphere using a pulse catalytic reactor.