Chemical-looping combustion in a 300 W continuously operating reactor system using a manganese-based oxygen carrier
Chemical-looping combustion in a 300 W continuously operating reactor system using a manganese-based oxygen carrier
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DOI：
10.1016/j.fuel.2005.11.014
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发表时间：
2006-06
期刊：
影响因子：
7.4
通讯作者：
A. Abad;T. Mattisson;A. Lyngfelt;Magnus Rydén
中科院分区：
文献类型：
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作者：
A. Abad;T. Mattisson;A. Lyngfelt;Magnus Rydén
化学环燃烧（CLC）是一种具有固有的二氧化碳分离的燃气燃烧方法。这种技术需要使用两个相互连接的反应器。固体氧载体在空气反应器中与空气中的氧发生反应，然后被转移到燃料反应器中，燃料气体被氧载体氧化为二氧化碳和水。燃料气体和空气从不混合，而且很容易从烟道气出口获得纯二氧化碳。氧载体通过再生过程在两个反应器之间循环。本文介绍了由两个相互连接的流化床组成的连续运行的实验室CLC装置的结果。研究了镁稳定氧化锆负载锰基氧载体的可行性。在燃料反应堆中使用天然气或合成气作为燃料。燃料流量和空气流量变化，热功率在100 ~ 300W之间，空气比在1.1 ~ 5.0之间。测试在四种温度下进行：1073、1123、1173和1223K。该原型在所有条件下都成功运行，没有出现氧载体团聚或失活的迹象。燃烧70h时使用相同的颗粒，每小时的质量损失为0.038%，但主要损失在运行的第一个小时。在天然气燃烧试验中，在出口烟气中检测到甲烷，而CO和h2则保持在低浓度。较高的温度或较低的燃料流量可提高燃烧效率，其范围从0.88到0.99。另一方面，在所有实验条件下，合成气的燃烧都是完全的，燃料反应堆产生的气体中没有CO或h2存在。
Chemical-looping combustion (CLC) is a method for the combustion of fuel gas with inherent separation of carbon dioxide. This technique involves the use of two interconnected reactors. A solid oxygen carrier reacts with the oxygen in air in the air reactor and is then transferred to the fuel reactor, where the fuel gas is oxidized to carbon dioxide and water by the oxygen carrier. Fuel gas and air are never mixed and pure CO2can easily be obtained from the flue gas exit. The oxygen carrier is recycled between both reactors in a regenerative process. This paper presents the results from a continuously operating laboratory CLC unit, consisting of two interconnected fluidized beds. The feasibility of the use of a manganese-based oxygen carrier supported on magnesium stabilized zirconia was tested in this work. Natural gas or syngas was used as fuel in the fuel reactor. Fuel flow and air flow was varied, the thermal power was between 100 and 300W, and the air ratio was between 1.1 and 5.0. Tests were performed at four temperatures: 1073, 1123, 1173 and 1223K. The prototype was successfully operated at all conditions with no signs of agglomeration or deactivation of the oxygen carrier. The same particles were used during 70h of combustion and the mass loss was 0.038% per hour, although the main quantity was lost in the first hour of operation. In the combustion tests with natural gas, methane was detected in the exit flue gases, while CO and H2were maintained at low concentrations. Higher temperature or lower fuel flows increases the combustion efficiency, which ranged from 0.88 to 0.99. On the other hand, the combustion of syngas was complete for all experimental conditions, with no CO or H2present in the gas from the fuel reactor.