Operating experience with chemical looping combustion in a 120 kW dual circulating fluidized bed (DCFB) unit
Operating experience with chemical looping combustion in a 120 kW dual circulating fluidized bed (DCFB) unit
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DOI：
10.1016/j.ijggc.2009.09.014
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发表时间：
2010-03-01
影响因子：
3.9
通讯作者：
Hofbauer, H.
中科院分区：
文献类型：
--
作者：
Kolbitsch, P.;Bolhar-Nordenkampf, J.;Hofbauer, H.
本文介绍了120 kW化学循环中试装置的首次运行经验。讨论了双循环流化床反应器系统及其辅助装置。在CLC装置上分别以天然钛铁矿和镍基颗粒为载氧体，在65-145 kW的功率范围内，对H2、CO和CH 4三种不同的载氧体进行了试验。由于设计概念的可扩展性，这些特性应该与商业CLC发电厂的那些特性非常相似，钛铁矿显示出富氢气体燃烧的高潜力（例如来自用蒸汽的煤气化）H-2转化率相当高，但仍存在进一步改进的高潜力。2和CO转化率以及非常高的CH 4转化率。空气/燃料比和反应温度的变化表明，颗粒的Ni/NiO比对化学链燃烧器的性能有影响。一般来说，在几乎任何条件下都可以观察到空气和燃料反应器中的低固体转化率。尽管H2O/CH 4摩尔比非常低，但没有观察到碳的形成。
This study presents first operating experience with a 120 kW chemical looping pilot rig The dual circulating fluidized bed reactor system and its auxiliary units are discussed. Two different oxygen carriers, ie ilmenite, which is a natural iron titanium ore, and a designed Ni-based particle, are tested in the CLC unit The pilot rig is fueled with H-2, CO and CH4 respectively at a fuel power of 65-145 kW High solids circulation, very low solids residence time and low solids inventory are observed during operation. Owing to the scalability of the design concept, these characteristics should be quite similar to those of commercial CLC power plants Ilmenite shows a high potential for the combustion of H-2-rich gases (e.g. from coal gasification with steam) The H-2 conversion is quite high but there is still a high potential for further improvement The Ni-based oxygen carrier achieves the thermodynamic maximum H-2 and CO conversion and also very high CH4 conversion. A variation of the air/fuel ratio and the reaction temperature indicates that the Ni/NiO ratio of the particle has an influence oil the performance of the chemical looping combustor Generally, low solids conversion in air and fuel reactors is observed in almost any conditions Despite a very low H2O/CH4 molar ratio, no carbon formation is observed (C) 2009 Elsevier Ltd All rights reserved.