Oxygen carriers for chemical looping combustion of solid fuels
Oxygen carriers for chemical looping combustion of solid fuels
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DOI：
10.1016/j.fuel.2008.11.006
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发表时间：
2009-05
期刊：
影响因子：
7.4
通讯作者：
A. Rubel;Kunlei Liu;J. Neathery;D. Taulbee
中科院分区：
文献类型：
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作者：
A. Rubel;Kunlei Liu;J. Neathery;D. Taulbee
使用热分析仪-差示扫描量热仪-质谱仪（TG-DSC-MS）研究氧载体（OC）在固体燃料化学链燃烧（CLC）应用中的潜在用途。研究了反应速率、重复氧化还原反应速率的变化、氧化过程中的放热以及改变还原气体成分的影响。氧化速率大于还原速率，并且反应速率可通过多个氧化还原循环重现，除非粉末发生团聚。研究发现氧化铁（Fe2O3 粉末）和铁基催化剂适用于固体燃料的 CLC，其还原率随着还原气体浓度的升高而增加。 Fe2O3 粉末用于在惰性气体中氧化高碳煤焦，去除焦炭中 88% 的碳。成本和耐久性等其他特性表明氧化铁 OC 具有用于固体燃料 CLC 的潜在用途。
A thermal analyzer–differential scanning calorimeter–mass spectrometer (TG–DSC–MS) was used to study oxygen carriers (OC) for their potential use for the application of chemical looping combustion (CLC) to solid fuels. Reaction rates, changes in reaction rates with repeated oxidation–reductions, exothermic heats during oxidation, and the effect of changing reduction gas compositions were studied. Oxidation rates were greater than reduction rates and reaction rates were reproducible through multiple oxidation–reduction cycles except where agglomeration occurred with powders. Iron oxide (Fe2O3powder) and iron-based catalysts were found suitable for CLC of solid fuels having rapid reduction rates which increased with higher reducing gas concentrations. Fe2O3powder was used to oxidize a high carbon coal char in an inert gas removing 88% of the carbon from the char. Other properties such as cost and durability indicated iron oxide OCs potential use for CLC of solid fuels.