Syngas combustion characteristics of four oxygen carrier particles for chemical-looping combustion in a batch fluidized bed reactor
Syngas combustion characteristics of four oxygen carrier particles for chemical-looping combustion in a batch fluidized bed reactor
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DOI：
10.1007/s11814-009-0089-7
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发表时间：
2009-03
影响因子：
2.7
通讯作者：
H. Ryu;Dowon Shun;D. Bae;Moonhee Park
中科院分区：
文献类型：
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作者：
H. Ryu;Dowon Shun;D. Bae;Moonhee Park
研究了载氧颗粒在合成气中的燃烧特性。在流化床反应器中对四种载氧颗粒进行了实验。所有四种载氧颗粒都表现出高的气体转化率、高的CO2选择性、还原剂中的低CO浓度和氧化剂中的非常低的NOx（NO、NO2、N2 O）排放。此外，所有的颗粒表现出良好的再生能力，在连续的还原-氧化循环试验，直到第10个周期。结果表明，在NiO/膨润土、NiO/NiAl 2 O 4、CoxOy/CoAl 2 O 4和OCN-650颗粒组成的合成气化学链燃烧系统中，可以实现固有的CO2分离、无NOx燃烧和长期运行而不发生载氧颗粒反应性衰减。然而，CoxOy/CoAl 2 O 4表示轻微的氧化反应性衰减的循环次数的增加和氧化速率比其他颗粒慢。
Syngas combustion characteristics of oxygen carrier particles have been investigated. Experiments were performed on four oxygen carrier particles in a fluidized bed reactor. All four oxygen carrier particles showed high gas conversion, high CO2selectivity, and low CO concentration in the reducer and very low NOx (NO, NO2, N2O) emissions in the oxidizer. Moreover, all particles showed good regeneration ability during successive reduction-oxidation cyclic tests up to the 10thcycle. The results indicate that inherent CO2separation, NOx-free combustion, and long-term operation without reactivity decay of oxygen carrier particles are possible in a syngas fueled chemical-looping combustion system with NiO/bentonite, NiO/NiAl2O4, CoxOy/CoAl2O4, and OCN-650 particles. However, CoxOy/CoAl2O4represented slight decay of oxidation reactivity with the number of cycles increased and the oxidation rate slower than other particles.