Process for reducing an eliminating nitrogen oxides in an exhaust gas
    5.
    发明授权
    Process for reducing an eliminating nitrogen oxides in an exhaust gas 失效
    减少排气中的氮氧化物的方法

    公开(公告)号:US4351811A

    公开(公告)日:1982-09-28

    申请号:US926111

    申请日:1978-07-19

    IPC分类号: B01D53/86 B01D53/36

    CPC分类号: B01D53/8628

    摘要: The concentrations of NO and NO.sub.2 in nitrogen oxides contained in an exhaust gas are adjusted to substantially equal mol concentrations, whereupon the exhaust gas is held in contact with a metallic oxide catalyst together with ammonia. Owing to the adjustment of the NO and NO.sub.2 concentrations in the nitrogen oxides, the reaction rate is enhanced, and the nitrogen oxides are reduced even at a low temperature. The adjustment of the concentrations of NO and NO.sub.2 in the nitrogen oxides is done by the oxidation of NO with ozone, the catalytic oxidation of NO with air or oxygen, the addition of nitric acid, the addition of NO or NO.sub.2, etc.

    摘要翻译: 将排气中含有的氮氧化物中的NO和NO 2的浓度调整为基本相等的摩尔浓度,由此废气与氨一起保持与金属氧化物催化剂接触。 由于氮氧化物中NO和NO 2浓度的调节,反应速度提高,氮氧化物即使在低温也降低。 氮氧化物中NO和NO2浓度的调节是通过用臭氧氧化NO,NO与空气或氧气的反应氧化,硝酸的添加,NO或NO2的添加等进行的。

    Process for steam reforming of hydrocarbons
    7.
    发明授权
    Process for steam reforming of hydrocarbons 失效
    碳氢化合物蒸汽重整方法

    公开(公告)号:US4060498A

    公开(公告)日:1977-11-29

    申请号:US520950

    申请日:1974-11-04

    IPC分类号: B01J23/89 B01J35/02 C01B3/40

    摘要: A process for steam reforming of hydrocarbons utilizing a catalyst comprising at least 3% by weight, preferably 10, to 30% by weight of nickel per weight of the catalyst, at least 2 mg-atoms of silver per 100 g of the catalyst; if necessary at least one of rare earth elements such as lanthanum, cerium, yttrium, praseodimium, neodimium, or a mixture of rare earth elements in an atomic ratio of the rare earth elements to silver of 10 or less, preferably 0.2 to 2.0; and a heat-resistant oxide carrier such as alumina, silica, magnesia, titania, zirconia, beryllia or thoria.

    摘要翻译: 一种使用催化剂蒸发重整烃的方法,该催化剂包含每重量催化剂至少3重量%,优选10至30重量%的镍,每100g催化剂至少2毫克原子银; 如果需要,稀土元素与稀土元素与银的稀土元素中的至少一种稀土元素如镧,铈,钇,镨,新二锑或稀土元素的混合物为10以下,优选为0.2〜2.0; 和氧化铝,二氧化硅,氧化镁,二氧化钛,氧化锆,氧化铍或氧化钍等耐热氧化物载体。