|
| 结构化载氧体颗粒化学链燃烧内扩散影响模拟分析 |
| Simulation analysis on the effect of internal diffusion from chemical looping combustion with structured oxygen carrier |
| 投稿时间：2018-03-21 |
| DOI：10.13259/j.cnki.eri.2018.03.006 |
| 中文关键词: 结构化载氧体颗粒 化学链燃烧 内扩散 反应速率 模拟 |
| 英文关键词:structured oxygen carrier particles chemical looping combustion internal diffusion reaction rate simulation |
| 基金项目: |
|
| 摘要点击次数: 2949 |
| 全文下载次数: 2388 |
| 中文摘要: |
| 采用有限速率模型对CuO/Al2O3结构化载氧体颗粒化学链燃烧进行了数值模拟，考察了不同结构化载氧体颗粒模型和进气速度对载氧体化学反应内扩散的影响。结果表明，相比于球形载氧体，环形结构拉西环载氧体内扩散更为容易，反应快，温升高；相比于全活性载氧体，1/4活性和半活性载氧体气体扩散到活性物质距离短，反应更快；增加进气速度能够加速颗粒内扩散，改善反应速率。 |
| 英文摘要: |
| The numerical simulation of chemical looping combustion with structured CuO/Al2O3 carrier particles was performed using finite rate model. The effects of different structured oxygen carrier particle models and inlet velocities on the internal diffusion of oxygen carrier chemical reaction were investigated. The results showed that compared with the spherical oxygen carrier, the cylinder Rasching ring had the properties of easier internal diffusion, larger reaction rate and higher temperature rise. In comparison with fully-active oxygen carrier, the diffusion distance and reaction for both quarter active and semi active oxygen carrier were shorter and faster, respectively. Increasing the inlet velocity could accelerate the intraparticle diffusion and improve the reaction rate. |
| HTML 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
