铜锰复合载氧体吸释氧反应性实验研究
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摘要
以Zr O2作为惰性载体制备Cu/Mn复合载氧体并在搭建的固定床反应器上研究气体流量、反应温度、进气氧含量和颗粒直径对Cu/Mn载氧体吸释氧反应性的影响.结果表明,随气体流量的增大,Cu/Mn载氧体的释氧和吸氧速率增大;随反应温度的升高,Cu/Mn载氧体的释氧速率增大而吸氧速率减小.释氧反应阶段,供气氧含量越低,Cu/Mn载氧体释氧速率越快;吸氧反应阶段,供气氧含量越高,Cu/Mn载氧体吸氧速率越快. Cu/Mn载氧体的吸释氧速率均随粒径的增加而增大.
Cu/Mn composite oxygen carriers were prepared using ZrO_2 as binder and the influences of gas flow rate,temperature,inlet oxygen concentration,particle diameter on the oxidation and reduction reactivity of Cu/Mn composite oxygen carriers were examined in a fixedbed reactor. The results showed that the reduction and oxidation rates increase with the increase of gas flow rate. High temperature favors the reduction,but restricts the oxidation of the Cu/Mn composite oxygen carriers. In the reduction stage,lower oxygen concentration leads to higher reduction rate. However,in the oxidation stage,oxidation rate increases with the increasing of oxygen concentration. For the composite oxygen carriers with different particle diameters,big particle diameter favors both the reduction and oxidation rates.
Cu/Mn composite oxygen carriers were prepared using ZrO_2 as binder and the influences of gas flow rate,temperature,inlet oxygen concentration,particle diameter on the oxidation and reduction reactivity of Cu/Mn composite oxygen carriers were examined in a fixedbed reactor. The results showed that the reduction and oxidation rates increase with the increase of gas flow rate. High temperature favors the reduction,but restricts the oxidation of the Cu/Mn composite oxygen carriers. In the reduction stage,lower oxygen concentration leads to higher reduction rate. However,in the oxidation stage,oxidation rate increases with the increasing of oxygen concentration. For the composite oxygen carriers with different particle diameters,big particle diameter favors both the reduction and oxidation rates.
引文
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[3] Guerrieri S A. Process for producing high purity oxygen by chemical means:3310381[P]. 1967-12-03.
[4] Mattision T,Lyngfelt A,leion H. Chemical-looping with oxygen uncoupling for combustion of solid fuels[J].International Journal of G reenhouse G as Control,2009,3(1):11-19.
[5]文圆圆,李振山,蔡宁生.铜基载氧体循环吸氧/释氧稳定性实验研究[J].工程热物理学报,2012,33(10):1798-1802.(Wen Yuan-yuan,Li Zhen-shan,Cai Ning-sheng. Experiment research on cyclic stability of oxygen capacity for copperbased oxygen carrier[J]. Journal of Engineering Thermophysics,2012,33(10):1798-1802.)
[6]杨勤勤.钙铜、铁铜双组分复合载氧体的化学链燃烧性能研究[D].青岛:青岛科技大学,2016.(Yang Qin-qin. Investigation into reactivity of Ca-Cu/Fe-Cu bi-component oxygen carrier in chemical-looping combustion[D]. Qingdao:Qingdao University of Science and Technology,2016.)
[7] Driessens F C M,Rieck G D. Phase equilibria in the system Cu-M n-O[J]. Journal of Inorganic G eneral Chemistry,1967,351:48-62.
[8]王强.化学链氧解耦燃烧中锰基载氧体特性实验研究[D].重庆:重庆大学,2014.(Wang Qiang. Experimental investigation on characteristics of M n-based oxygen carrier in chemical looping w ith oxygen uncoupling[D]. Chongqing:Chongqing University,2014.)
[9] Wang K,Yu Q B,Qin Q. Reduction kinetics of Cu-based oxygen carriers for chemical looping air separation[J].Energy&Fuels,2013,27(9):5466-5474.
[10]王坤,于庆波,秦勤,等.化学链制氧技术中铜-锆载氧体的动力学分析[J].无机材料学报,2014,29(3):301-308.(Wang Kun,Yu Qing-bo,Qin Qin,et al. Kinetics analysis of Cu-Zr oxygen carrier for chemical looping oxygen production[J]. Journal of Inorganic Materials,2014,29(3):301-308.)
[11] Wang K,Yu Q B,Qin Q,et al. Evaluation of Cu-based oxygen carrier for chemical looping air separation in a fixedbed reactor[J]. Chemical Engineering Journal,2016,287(1):292-301.