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| 題 名 | An Experimental and Theoretical Study of the Conversion of Charnitrogen to No During Fluidized Bed Coal Combustion=以流體化床探討煤炭轉化為氧化氮 |
|---|---|
| 作 者 | 詹春成; | 書刊名 | 明志工專學報 |
| 卷 期 | 19 1987.05[民76.05] |
| 頁 次 | 頁1-10 |
| 分類號 | 460.02 |
| 關鍵詞 | 化床; 流體; 氧化氮; 煤炭; 轉化; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 本文利用一種實驗和模式的研究,藉以探討煤炭內的氮含量于流體化床中燃燒轉換成一氧化氮的效率。在-7公分內徑的流體化床之設備中,完成了一系列煤炭粒子的氧化實驗。其中所選擇之床體粒子為?燒石灰石,而流化化所選擇之氣體則為氮和氧的混合物。自流體化床所排出之煙氣,可用化學發光NO/N□分析儀和氣相色層分析儀來分析NO,□,CO和C□的濃度。煤炭中的氮元素轉換成一氧化氮的函數,由研究中可瞭解為(1)床體溫度(1000~1175K),(2)煤炭粒徑(1~5mm)與(3)氧的濃度(3~21%)。 單一穎炭粒子的模型,已被發展來預測NO在粒子孔隙內和環繞煤炭粒子的界面層中之生成和破壞。碳的氧化,C□和C之反應,CO之氧化,均勻相和非均勻相中NO的還原之反應動力學,皆已考慮於模式中。 模式的預測和實驗結果相比較得到合理的一致性。 |
| 英文摘要 | An experimental and modeling study has been conducted to investigate the conversion of char-nitrogen to NO during combustion in a fluidized bed. A series of oxidation experiments are performed on char particles in a 7 cm I.D. fluidized bed unit. Calcined limestones are used as bed particles and are fluidized by a mixture of nitrogen and oxygen. The flue gas from the fluidized bed is analyzed for the concentrations of N□ □, CO and C□ using a chemiluminescent NO/N□-analyzer and a gas chromatograph. The conversion of char-nitrogen to NO as a function of bed temperature (1000-1175K), char particle size (1-5mm) and oxygen concentration (3-21%) are studied. A signal char particle model has also been developed for predicting the formation and destruction of NO inside the pores and in the boundary layer around the char particle. Reaction kinetics for the carbon oxidation, the C□+C reaction, the oxidation of C, the homogeneous and heterogeneous reduction reactions of NO are included in the model. The model predictions are compared with the experimental results with reasonably good agreement. |
本系統中英文摘要資訊取自各篇刊載內容。