煤灰对铁基载氧体理化特性的影响

发布时间：2018-05-08 12:01

本文选题：化学链燃烧 + 中国煤种　；参考：《热能动力工程》2016年12期

【摘要】：以我国3种典型煤种(褐煤、烟煤和无烟煤)制备的煤灰和铁基载氧体为对象,在热重分析仪上研究了煤灰与铁基载氧体之间的相互作用,考察了煤灰对铁基载氧体反应性能、持续循环性能和物理结构的影响。结果表明,3种煤灰均能够提高还原阶段气体燃料的转化效率使得铁基载氧体的失重量显著增加,其中无烟煤煤灰对气体燃料转化率的提高最为显著,铁基载氧体失重量比未添加煤灰时提高了37%,褐煤灰和烟煤灰表现相似,铁基载氧体失重量提高约35%。未添加煤灰的铁基载氧体循环反应性能表现稳定,而添加3种煤灰后的铁基载氧体持续循环能力呈现不同程度的下降,主要原因是3种煤灰在铁基载氧体颗粒表面的沉积导致铁基载氧体颗粒发生不同程度的烧结,其中无烟煤对铁基载氧体物理结构的影响最小。
[Abstract]:The interaction between coal ash and iron based oxygen carrier was studied by thermogravimetric analysis, and the reaction performance of coal ash to iron based oxygen carrier was investigated by means of thermogravimetric analysis, taking coal ash and iron based oxygen carriers prepared from three kinds of typical coal (lignite, bituminous coal and anthracite) as objects. Effect of continuous cycle performance and physical structure. The results showed that all three kinds of coal ash could improve the conversion efficiency of gaseous fuel during the reduction stage, and the weight loss of iron-based oxygen carrier increased significantly, among which anthracite coal ash increased the conversion rate of gaseous fuel most significantly. The weight loss of iron based oxygen carrier is 37% higher than that without coal ash. Lignite ash is similar to bituminous coal ash, and iron base oxygen carrier weight loss is increased about 35%. The performance of Fe-based oxygen-carrying reaction without coal ash was stable, but the continuous cycling ability of Fe-based oxygen-carrying agent decreased in varying degrees after adding three kinds of coal ash. The main reason is that the deposition of three kinds of coal ash on the surface of iron-based oxygen-carrier particles leads to the sintering of iron-based oxygen-carrying particles to varying degrees, among which anthracite has the least influence on the physical structure of Fe-based oxygen-carrying bodies.
【作者单位】：神华国华(北京)电力研究院有限公司;东南大学能源热转换及其过程测控教育部重点实验室;
【基金】：国家杰出青年科学基金资助项目(51525601) 国家自然科学基金资助项目(51476035)
【分类号】：TK16

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