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首页> 外文期刊>Fuel >Hydrolysis of HCN as an important step in nitrogen oxide formation in fluidised combustion. Part l. Homogeneous reactions
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Hydrolysis of HCN as an important step in nitrogen oxide formation in fluidised combustion. Part l. Homogeneous reactions

机译：HCN的水解是流化燃烧中氮氧化物形成的重要步骤。第一部分均相反应

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摘要

The formation of nitrogen oxides at conditions of fluidised combustion was investigated by the combustion and hydrolysis of HCN, the main precursor of nitrogen oxides. The experiments revealed that an understanding of the complex conversion mechanism of fuel-N during coal combustion could be simplified by concentrating on the conversion of HCN. There are two main parallel conversion routes. The oxidation of HCN via NCO to nitrogen oxides and alternatively its hydrolysis first into NH_3 and subsequent oxidation. Gaseous SO_2, the concentration of which is controlled in FBC by limestone, interacts as well with fuel-N intermediates leading to a suppressed formation of NO while favouring N_2O formation. Finally it becomes clear that the parallel formation of NH_3 by hydrolysis not only leads to an additional formation of NO at medium temperatures but also to an additional decomposition of NO at elevated temperatures.
机译：通过流化燃烧条件下氮氧化物的主要前体HCN的燃烧和水解研究了氮氧化物的形成。实验表明，通过集中HCN的转化可以简化对煤燃烧过程中燃料N复杂转化机理的理解。有两种主要的并行转换途径。经由NCO将HCN氧化为氮氧化物，或者先将其水解为NH_3，然后进行氧化。气态SO_2（其浓度由石灰石控制在FBC中）也与燃料-N中间体相互作用，导致抑制了NO的生成，同时有利于N_2O的形成。最终变得清楚的是，通过水解平行形成NH_3不仅导致在中等温度下另外形成NO，而且导致在高温下另外分解NO。

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