Hydrolysis of HCN as an important step for the conversion of fuel-N

被引：0

作者：

Schäfer, S ^{[1
]}

Bonn, B ^{[1
]}

Wanzl, W ^{[1
]}

机构：

[1] Deutsch Montan technol GmbH, D-45307 Essen, Germany

来源：

PROSPECTS FOR COAL SCIENCE IN THE 21ST CENTURY | 1999年

关键词：

fluidised combustion; nitrogen oxides; hydrolysis; limestone;

D O I：

暂无

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

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 understanding of the complex conversion mechanism of fuel-N during coal combustion can be simplified by concentrating on the conversion of HCN. There are two main parallel conversion paths. The oxidation of HCN via NCO to nitrogen oxides and, alternately, first its hydrolysis into NH3 and subsequently the oxidation. In the presence of Ca-compounds CaCN2 is an intermediate product that directs the fuel-N conversion towards the formation of NH3 which is subsequently oxidised to NO. The catalysed hydrolysis of HCN forms, besides its relevance for nitrogen oxide formation, also an explanation for the observed favoured release of NH3 during pyrolysis of low rank coals such as lignites.

引用

页码：1349 / 1352

页数：4