| 摘要: | 本研究擬利用高週波電漿系統在不添加觸媒的條件下將CH4分解並轉化生成CH3OH, HCHO,C2H6, C2H4及C2H2。於實驗進行過程中發現，在此系統下分解轉化CH4沒有積碳形成，而且碳平衡皆介於0.87∼1.24之間。實驗結果顯示，輸入必v的增加不利於FCH3OH及FHCHO的形成，在CH4之進流濃度小於15%, 或O2之進流濃度大於10%的條件下則有利於CH3OH 及 HCHO的生成。當控制條件設定於反應器A，O2/CH4＝1.0，操作壓力＝10 Torr，CH4進流濃度＝10%，總進流量100sccm時，FCH3OH於50 Watts輸入必v達到最高（0.91%）。實驗主要探討各個操作參數（輸入必v、CH4之進流濃度、O2之進流濃度、總進流量及反應器變化）對ηCH4及副產物(CO、CO2、HCHO、C2H2 + C2H4 + C2H6、CH3OH)之影響，並嚐試尋找出最佳轉化率之操作條件，以提供未來應用本技術於商業技術研發之參考。
This work demonstrates the possibility of directly converting CH4 into CH3OH,HCHO, C2H6, C2H4 and C2H2 without adding a catalyst to the RF plasma system.Neither carbon black nor a deposit was formed during the experiment. The carbon balance in all experiments was between 0.87 and 1.24. At a given specific energy, a higher applied power did not favor the partial oxidation of CH4 to CH3OH and HCHO. However, a CH4 feeding concentration of less than 15% or an O2 content of under 10% favored the formation of CH3OH and HCHO. FCH3OH reached the maximum of 0.91% at input power of 50 Watts under the condition: O2/CH4＝0.1, operational pressure＝10 Torr, CH4 feeding concentration＝10%, total gas flow rate＝100sccm. In the study, experiments were conducted to elucidate the effects of operational parameters, input power, CH4 feeding concentration, O2 feeding concentration, total gas flow rate and various plasma reactor, on CH4 conversion fraction (ηCH4) and product formation fractions. Furthermore, the results will provide fundamental information for applying the technology in the future commercial processes. |
