煤焦在O_2和CO_2的反应过程中氮的析出特性研究  

Nitrogen Release During Reaction of Coal Char with O_2 and CO_2

作　　者：林敏[1] 万斌[1] 龚媛媛[1] 龚继文[2] 

机构地区：[1]江西省科学院能源研究所,南昌330096 [2]江西省科学院,南昌330096

出　　处：《能源研究与管理》2014年第4期26-28,71,共4页Energy Research and Management

基　　金：国家自然科学基金(51166004);江西省科技支撑计划(20112BBE50027);江西省科学院科研开发专项(2011YYB01)

摘　　要：通过分析焦炭N与02、CO2的反应，研究焦炭N转化为含N产物的化学过程和析出特性。实验在固定床反应器上进行，压力为0．1～1．0MPa。结果表明：02、CO2和N2等主要检测产物与反应气体有关。在较宽的压力和CO2体积分数范围内，焦炭N与CO2反应生成N2的反应具有很高的选择性。以02和CO2为反应气体时，反应压力对气化产物的分布影响较小。当O2作为气化剂时，NO和HCN是主要产物，而且其他检测产物会由这些主要产物在焦炭表面相互反应得到。The chemistry of char-N release and conversion to nitrogen-containing products has been probed by studying its release and reactions with O2 and CO2. The experiments were performed in a fixed bed flow reactor at pressures of up to 1.0 MPa, The results show that the major nitrogen-containing products observed depend on the reactant gas; with O2, NO, and N2 being the major species observed. Char-N reaction with CO2 produces N2 with very high selectivity over a broad range of pressures and CO2 concentrations. Observed distributions of nitrogen-containing products are little affected by pressure when 02 and CO2 are the reactant gases. The results suggest that NO and HCN are primary products when O2 is used as the reactant gas, and that the other observed products arise from interactions of these primary products with the char surface.

关 键 词：煤 煤焦 粉煤 NOX 

分 类 号：TK16[动力工程及工程热物理—热能工程]