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Effects of oxygen carrier mole fraction, velocity distribution on conversion performance using an experimentally validated mathematical model of a CLC fuel reactor
Applied Energy ( IF 11.2 ) Pub Date : 2017-09-18 , DOI: 10.1016/j.apenergy.2017.09.067
R. Ben-Mansour , H. Li , M.A. Habib

Due to the severity of the worldwide climate change problem and the ocean acidification problem, chemical looping combustion (CLC) technology is studied worldwide by researchers in order to meet the urgency of carbon emission reduction after its concept has been put forward. An experimentally validated computer model has been implemented in Ansys-Fluent code with the most appropriate kinetic model implemented in User Define Functions. The validated model has been used to carry out a numerical study on a model fuel reactor using CaSO4 as oxygen carrier and H2 as fuel; is conducted in the present work. Effects of mole fraction of CaS, operating temperature, superficial feeding velocity magnitude of fuel and the diameter of oxygen carrier particles were discussed. The results indicate that the superficial feeding velocity of gaseous fuel has significant effects on the flow condition with fuel reactor and conversion performance, while operating temperature mainly affects the fuel conversion. The effects of particle diameter on flow condition within FR are obvious but insignificant on conversion performance of fuel. The mole fraction of CaS has the least effect among these three parameters. Several velocity distributions are also studied. The rectangle-trianble distributor results in better bubbles distributions, but the gain of higher fuel conversion rate is insignificant due to the low chemical activity of OC used in this study.



中文翻译:

氧载流子摩尔分数,速度分布对转化性能的影响(使用经实验验证的CLC燃料反应堆数学模型)

由于全球气候变化问题和海洋酸化问题的严重性,研究人员在世界范围内研究了化学循环燃烧(CLC)技术,以满足提出碳减排概念后的紧迫性。已通过Ansys-Fluent代码实现了经过实验验证的计算机模型,而在用户定义函数中实现了最合适的动力学模型。已验证的模型已用于对以CaSO 4为氧气载体和H 2的模型燃料反应堆进行数值研究。作为燃料;在当前工作中进行。讨论了CaS的摩尔分数,工作温度,燃料的表面进料速度大小和载氧颗粒直径的影响。结果表明,气态燃料的表观进料速度对燃料反应器的流动条件和转化性能有显着影响,而工作温度主要影响燃料的转化。粒径对FR内流动条件的影响是显而易见的,但对燃料的转化性能影响不明显。在这三个参数中,CaS的摩尔分数影响最小。还研究了几种速度分布。矩形的trianble分布器可产生更好的气泡分布,

更新日期:2017-09-18
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