煤炭氣化技術之應用，可有效降低燃燒煤炭產生之污染對環境造成衝擊，並可應用於高效率IGCC系統中，以達到43%以上之發電效率。而在其相當複雜之氣化過程當中，其化學動力反應機制是粉煤燃燒氣化過程之關鍵，必須要能掌握在氣化爐進料的化學動力反應的細節，才能進一步掌握以計算流體力學模擬氣化爐內燃燒與氣化等模擬結果之品質。故本文以挾帶床氣化爐為研究目標，建立一包含化學動力反應機制之完整多相紊流燃燒數值分析模式。參考實驗組之入口條件以及煤炭成分，使用商用計算軟體FLUENT模擬比對其出口成份和出口溫度，並建立一整合FLUENT計算流體力學軟體及CHEMKIN化學反應運算軟體之完整數值計算模式。其模擬結果與實驗比較，在各出口成分之比重之趨勢與實驗結果一致，出口溫度則是略高實驗值約71.6K。而在三組參數分析上:氣化爐壁面溫度測試、煤炭燃料含水比例測試以及二級式進料方式之設計，分別來評估最佳之產氫效能，其氣化爐壁面溫度在較低時，有助於產氫效能之提升；煤炭燃料含水比例測試，則會隨著加水量提高，出口成分氫氣亦隨之提高，達到產氫效能之提升；二級進料之方式，對出口產氫效能之有助於提升，且在溫度分布上，會導致出口溫度降低。

Coal gasification technique is an effective and alternative method to reduce the environmental pollution by the traditional coal combustion. It also can be incorporated into the IGCC (Integrated Gasification Combined Circle) system and the attainable generation efficiency is 43%. The reaction kinetics of the coal oxidation/gasification is the essential part of the complicated gasification process. Reliable computational results can only be obtained when mastering the chemical reaction mechanism of the gasification reactor. The object of the present study is to develop the multi-phase, turbulent-combustion model incorporated with the detailed chemical reaction mechanism of the entrained-bed gasifier. Operating conditions, employed coal properties, outlet composition and temperature to be compared were adopted from the cited experimental study. The numerical model was built by the commercial software, FLUENT, integrated with the proposed CHEMKIN reaction mechanism. The tendency to the outlet temperature is consistent with experiment, and the outlet temperature has higher about 71.6 K . The effects of three operating parameters, i.e., the gasifier wall temperature, the steam fraction of fuel and the two-stage feeding design, on the gasification performance were investigated. Hydrogen fraction and mass flow rate at outlet increase with lower wall temperature of gasifier and with the increase of the steam fraction of fuel. Numerical results indicated that the effects of the two-stage feeding design on the gasification performance are improved, and caused outlet temperature to reduce.

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