采用常规浸渍法制备了Rh/α-Al2O3催化剂,建立了甲烷快速部分氧化重整试验体系.通过控制变量法,考察了甲烷快速部分氧化重整反应中反应条件参数(CH4/O2、反应气体预混合温度、空速)变化对反应物的转化率、反应产物及分布的影响.试验结果表明,在试验条件下,CH4的转化率始终大于85％,O2转化率接近100％,CO的选择性为85％左右,H2的选择性为40％～60％.反应过程大致为催化剂入口处的部分氧化反应和下游的水蒸气重整,大部分的CO由部分氧化产生,而H2的产生受水蒸气重整反应的影响较大；随着反应温度的上升,CH4的转化率上升,CO,H2的选择性也上升；随着空速的增大,H2的选择性减小,表明甲烷催化部分氧化反应是一个受传质控制的反应.%The Rh catalyst was prepared from impregnation ofα-AI2O3, foam and the experimental system for short-Contact-Time reforming was established. By adjusting the reaction parameters, the effects of different reaction parameters (including CH4/O2, feed gas temperature, space velocity) on the conversion rate of reactants and the reaction products distribution were researched. The experimental results were analyzed, and conclusions are list as followed: Under the reaction condition in this paper, conversion of CH4 is always higher than 85%, conversion of O2 is almost 100%, selectivity of CO is approximately 85%, selectivity of H2 varies is between 40% and 60%. The reaction process can be divided into two parts: partial oxidation of methane at the entrance of catalyst and steam reforming of methane downstream. The majority of CO in the exhaust is produced by partial oxidation of methane, but the contribution of steam reforming on H2 production is significant. As the temperature rises, CH4 conversion rate, CO and H2 selectivity increase. As space velocity increases, H2 selectivity decreases. This phenomenon indicates that the catalytic partial oxidation of methane is a reaction which is controlled by mass transfer.
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