Method for the removal of Nox and N2O from the tail gas in nitric acid production
    6.
    发明授权
    Method for the removal of Nox and N2O from the tail gas in nitric acid production 有权
    在硝酸生产中从尾气除去Nox和N2O的方法

    公开(公告)号:US07485276B2

    公开(公告)日:2009-02-03

    申请号:US10169970

    申请日:2001-01-09

    Abstract: A process is described for reducing the NOx concentration and N2O concentration from the residual gas from nitric acid production. The process encompasses the passing of the residual gas leaving the absorption column, prior to entry into the residual gas turbine, through a combination of two stages. The first stage here reduces the NOx content and the second stage the N2O content of the gas, the NOx/N2O ratio prior to entry of the gas into the second stage being in the range from 0.001 to 0.5, and this gas being brought into contact in the second stage with a catalyst which is substantially composed of one or more iron-loaded zeolites.

    Abstract translation: 描述了用于从硝酸生产的残余气体中降低NOx浓度和N 2 O浓度的方法。 该方法包括在进入残余燃气轮机之前通过两个阶段的组合使离开吸收塔的残余气体通过。 这里的第一阶段降低了NOx含量,第二阶段降低了气体的N2O含量,在进入第二阶段之前,气体进入第二级之前的NOx / N2O比在0.001至0.5的范围内,并且该气体被接触 在第二阶段中具有基本上由一种或多种负载铁的沸石组成的催化剂。

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