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METHOD FOR THE SIMULTANEOUS REMOVAL OF NITROGEN OXIDES AND LAUGHING GAS FROM A GAS STREAM CONTAINING NITROGEN OXIDES AND LAUGHING GAS
METHOD FOR THE SIMULTANEOUS REMOVAL OF NITROGEN OXIDES AND LAUGHING GAS FROM A GAS STREAM CONTAINING NITROGEN OXIDES AND LAUGHING GAS
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机译：从含氮氧化物和渗滤气体的天然气流中同时去除氮氧化物和渗滤气体的方法
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摘要
The invention relates to a method for the simultaneous removal of nitrogen oxides and laughing gas stream containing nitrogen oxides and laughing gas, wherein a first catalyst that contains cobalt and, as support, an inorganic metal oxide, and a second catalyst that contains iron and, as support, an inorganic metal oxide, are used. In particular the method is carried out in such a way that (a) the gas stream containing nitrogen oxides and laughing gas is reacted with a reducing gas, the reducing gas comprising a saturated hydrocarbon, in the presence of the first catalyst, and (b) the gaseous product from step (a) is reacted with a reducing gas, the reducing gas comprising a saturated hydrocarbon, in presence of a second catalyst. The catalyst system can be used for the treatment of off-gases from a nitric acid plant.
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