Thermodynamic Investigation of Carbon Deposition and Sulfur Evolution in Chemical Looping Combustion with Syngas
Thermodynamic Investigation of Carbon Deposition and Sulfur Evolution in Chemical Looping Combustion with Syngas
复制标题
DOI：
10.1021/ef7005673
复制
发表时间：
2008-02
期刊：
影响因子：
5.3
通讯作者：
Baowen Wang;R. Yan;D. Lee;D. T. Liang;Ying Zheng;Haibo Zhao;C. Zheng
中科院分区：
文献类型：
--
作者：
Baowen Wang;R. Yan;D. Lee;D. T. Liang;Ying Zheng;Haibo Zhao;C. Zheng
采用热力学模拟研究了合成气（CO、H2、CO2、H2O(g)、N2 和 H2S 的合成气体混合物）的化学链燃烧 (CLC)，重点研究了 CLC 中的碳沉积和硫析出。选择 NiO、CuO、Fe2O3、Mn3O4 和 CoO 等五种金属氧化物作为 CLC 应用的氧载体。研究了积碳形成的不同影响因素，包括压力、燃料反应器（FR）温度、氧过量值Φ（表示氧载体中晶格氧对燃料的可用性）和燃气成分。较高的温度和较大的氧过剩数Φ抑制了积炭的形成，而加压条件则相反。合成气中H2O(g)和CO2含量的增加减少了碳沉积，相反，合成气中大量H2S的存在导致形成更多的碳沉积。对不同因素的敏感性分析表明，积碳主要决定于...
Chemical looping combustion (CLC) with syngas, a synthesized gas mixture of CO, H2, CO2, H2O(g), N2, and H2S, was investigated using thermodynamic simulation, with focus on carbon deposition and sulfur evolution in CLC. Five metal oxides, such as NiO, CuO, Fe2O3, Mn3O4, and CoO, were selected as oxygen carriers for CLC application. Different influencing factors on the formation of carbon deposits were investigated, including pressure, fuel reactor (FR) temperature, oxygen excess number Φ (denoting the availability of lattice oxygen in the oxygen carrier to the fuel), and fuel gas composition. Higher temperature and larger oxygen excess number Φ inhibited the formation of carbon deposits while the pressurized condition caused the opposite. The increase of H2O(g) and CO2 fraction in syngas reduced carbon deposition while, in contrast, a larger H2S occurrence in syngas led to more carbon deposits to be formed. A sensitivity analysis to the different factors revealed that carbon deposition was mainly determin...