• 作者： 陳郁文
• 作者服務機構： 國立中央大學化學工程系
• 中文摘要： 本研究主要在探討甲烷化反應在商業用鎳觸媒MCR-2X之動力方程式。實驗顯示二氧化碳與甲烷對反應速率並無影響，而水蒸氣會使反應速率降低，所獲得之反應方程式為：
• 英文摘要： An empirical rate equation was obtained for the methanation kinetics catalyzed by MCR-2X, a com-mercial catalyst prepared by Haldor-Topsoe. The studies were carried out in a fixed-bed reactor underdifferential conditions, and in a gradientless recycle reactor (Berty) over a range of total pressures, reactantconcentractions (H /CO ratios), and temperatures. The kinetics of methanation were found to be of firstorder in hydrogen at total gas pressures below 7 atm, and of half order at higher pressures. With respect tocarbon monoxide the reaction order was -0.46 in the composition range studied (H /CO 3). Water vapor,a reaction product, was observed to inhibit the methanation rate. On the other hand, carbon dioxide andmethane had no influence on the reaction kinetics. The following rate equation was obtained for the meth-anation rate ( ) with the partial pressure (p) of each component expressed in atmospheres and the rateconstant K in mol．g catalyst．s ： （方程式無法摘錄）with x＝1 at P ＜ 5 atm x＝0.5 at P ＞ 7 atm y＝0.5 z＝0.6 c＝0.42 atm . The catalyst was observed to be susceptible to deactivation by hydrogen sulfide in the feed gas. Therate coefficient for deactivation was determined．Its value for MCR-2X was comparable to that of othernickel-based catalysts.
• 中文關鍵字： methanation; nickel; catalysis; kinetics
• 英文關鍵字： --