METHOD FOR REMOVING NOx
    49.
    发明公开
    METHOD FOR REMOVING NOx 失效
    VERFAHREN ZUR ENTFERNUNG VON STICKOXIDEN

    公开(公告)号:EP1063000A4

    公开(公告)日:2003-01-02

    申请号:EP98907162

    申请日:1998-03-11

    摘要: The invention provides a process for removing NOx which is free of impairment in denitration efficiency at a reaction temperature of up to 300 DEG C even when the component molar ratio of NOx in the gas to be treated is NO2 > NO. For use in removing NOx from the gas to be treated and containing NO2 in a larger amount than NO, that is, having a (NO2)/NOx ratio in excess of 0.5, by selective reduction with use of ammonia serving as a main reducing agent in the presence of a denitration catalyst, the process of the invention for removing NOx comprises adding to the denitration reaction system a substance for removing an excess of oxygen accumulating on catalyst active sites by selectively reducing the oxygen at not higher than 300 DEG C, for example, at 300 to 150 DEG C, in other words, a substance which reacts with the excess of oxygen on the catalyst active sites and becomes oxidized at not higher than 300 DEG C.

    摘要翻译: 本发明提供一种除去NOx的方法,即使在待处理气体中的NOx的成分摩尔比为NO2> NO时,在高达300℃的反应温度下,脱硝效率也不受损害。 用于从待处理的气体中除去NOx并且含有比NO大的NO 2,即(NO 2)/ NOx比超过0.5时,通过使用氨作为主要还原剂进行选择性还原 在脱硝催化剂的存在下,本发明除去NOx的方法包括向脱硝反应体系中加入一种物质,用于通过选择性地将氧气在不高于300℃还原的方式除去积聚在催化剂活性位上的过量的氧,用于 例如,在300〜150℃,换句话说,与催化剂活性部位上的过量氧反应并在不高于300℃氧化的物质。