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題名 | 生質顆粒在部分燃燒時的碳化分析=Carbonization Analysis of Biomass Particles during Partial Combustion |
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作者 | 李春壽; 林正亮; | 書刊名 | 嘉義技術學院學報 |
卷期 | 67 1999.12[民88.12] |
頁次 | 頁49-61 |
分類號 | 445.844 |
關鍵詞 | 燃燒; 碳化; 生質顆粒; Combustion; Carbonization; Biomass particles; |
語文 | 中文(Chinese) |
中文摘要 | 生質顆粒(稻草、稱殼、和花生殼)在不同流場溫度下,以量測其重量變化、顆粒溫度、和生成的氣體濃度探討其部分燃燒的特性。試驗結果顯示重量減少速率和最後剩餘重量隨著流場溫度升高而增快和降低。對於試驗的三種原料而言,燃燒溫度為400 ℃時都會產生最大的CO濃度;如果分析在整個部分燃燒階段所釋放出的CO體積,溫度愈低CO排放量愈高,其原因是較低溫時CO產生時段較長,縱使到最後階段都還能量測到些許CO。分析稻草、稻殼、和花生殼在部分燃燒時所得到的焦碳之物理特性,其結果顯示操作溫度愈高比表面積愈低,但是孔隙體積差異不大,其原因是產生的孔隙間之孔壁,在400 ℃的溫度下即被破壞。雖然所得的是稀鬆的物質,但是其比表面積和一般商業活性碳相比還不是很理想,所以欲得到有商業價值的吸附產品,仍然需要活化的程序以增加較多孔隙,提高比表面積。比較試驗的三種原料,稻殼是研製活性碳的最佳材料,因為其比表面積和孔隙體積的數值都明顯的比其他兩種大。 |
英文摘要 | Behavior of partial combustion of biomass particles (rice straw, rice hull, and peanut shell) was investigated by measuring weight loss, particle temperature, and exhaust gas concentrations in different flow fields. Experimental results indicated that weight loss are increased and remaining fraction of final weight decreased with increase of temperature. For the three raw materials in this study, production of CO concentration would be maximum at combustion temperature of 400 ℃. However, release volume of CO, for the whole combustion process, would be higher for lower temperature. The reason for the fact would be that CO production lasted longer and slight CO could be measured even at final period of combustion for lower temperature. Physical properties of produced char from rice straw, rice hull, and peanut shell were analyzed. Results indicated that specific surface area would be less for higher operation temperature; in addition, pore volume barely varied with temperature which resulted from the fracture of membrane among pores as temperature of 400 ℃. Although the produced chars were porous materials, their specific surface area was much lower than that of the commercial activated carbon. Therefore, activation, which could produce more micropores to increase specific surface area, would be a necessary procedure in order to obtain adsorptive products with commercial value. Comparison of those three materials, rice hull would be the best material to produce activated carbon since its' specific surface area and micropore volume after partial combustion were much larger than that of the others. |
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