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    • 80. 发明授权
    • Iron compound catalyst for inhibiting generation of dioxin
    • 用于抑制二恶英产生的铁化合物催化剂
    • US06800587B2
    • 2004-10-05
    • US09840878
    • 2001-04-25
    • Tomoyuki ImaiToshiki MatsuiYasuhiko FujiiSatoshi HatakeyamaKojiro TsutsumiTomoko OkitaHiroshi InoueTatsuaki BabaMasaki IshiharaTakashi Okamura
    • Tomoyuki ImaiToshiki MatsuiYasuhiko FujiiSatoshi HatakeyamaKojiro TsutsumiTomoko OkitaHiroshi InoueTatsuaki BabaMasaki IshiharaTakashi Okamura
    • B01J2370
    • B01J23/745B01D53/8662
    • An iron compound catalyst for inhibiting the generation of dioxin contains iron oxide particles, iron oxide hydroxide particles or mixed particles having a catalytic activity capable of converting not less than 15% of carbon monoxide into carbon dioxide when 2.8×10−4 mol of iron oxide particles obtained by heat-treating the iron compound catalyst in air at a temperature of 800° C. for 15 minutes, are instantaneously contacted with 6.1×10−7 mol of carbon monoxide at a temperature of 250° C. at a space velocity (SV) of 42,400 h−1 in an inert gas atmosphere using a pulse catalytic reactor, the iron oxide particles or the iron oxide hydroxide particles have an average particle size of 0.01 to 2.0 &mgr;m, a BET specific surface area of 0.2 to 200 m2/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. This iron compound catalyst enables complete combustion of municipal solid waste and decomposition of dioxin precursors even at a low combustion temperature in intermittently operated incinerators such as mechanical batch incinerators or semi-continuous incinerators, and can inhibit dioxin generation of due to a memory effect upon low-temperature combustion at the start-up or shut-down of the incinerators, without large-scale incinerator renovation or plant and equipment investment.
    • 用于抑制二恶英产生的铁化合物催化剂含有氧化铁颗粒,氧化铁氢氧化物颗粒或具有能够将不少于15%的一氧化碳转化为二氧化碳的催化活性的混合颗粒,当2.8×10 -4摩尔的氧化铁颗粒 在800℃的温度下将空气中的铁化合物催化剂热处理15分钟,通过空速(SV)在温度250℃下与6.1×10 -7摩尔一氧化碳瞬时接触而获得, 在惰性气体气氛中使用脉冲催化反应器,所述氧化铁颗粒或铁氧化物氢氧化物颗粒的平均粒径为0.01〜2.0μm,BET比表面积为0.2〜200m2 / g, 磷含量不大于0.02重量%,硫含量不大于0.6重量%,钠含量不大于0.5重量%。 这种铁化合物催化剂即使在间歇操作的焚烧炉如机械分批焚化炉或半连续焚烧炉中也能在低燃烧温度下,能完全燃烧城市固体废物和二恶英前体的分解,并且可以抑制由于记录效应低的二恶英生成 - 焚烧炉启动或关闭时的温度燃烧,无需大型焚烧炉更新或设备和设备投资。