Abstract The passive production of synthesis gas from liquid methanol using a packed bed of porous material particles supporting a catalyst is investigated. Heating of the upper portion of a vertical tube packed with the porous particles where the bottom is immersed in liquid methanol is expected to cause steady upward fluid flow due to capillary action enhanced by evaporation. The emergence of a dry region and a resulting increase in temperature can produce synthesis gas due to catalytic reaction, which then flows out of the top end of the tube. In the proposed process, the capillary force, which is dependent on the local liquid content in the porous bed, is balanced locally with the gravitational force and the viscous forces acting on the liquid and vapor. The distributions of the liquid content, flow rates, pressures, and temperatures of liquid and vapor along the tube axis are calculated using a one-dimensional model based on the mass, force, and energy balances for each phase. The experimental results indicate the validity of the process, that is, the induction of steady fluid flow, the emergence of a dry region, temperature increase to the reaction level, and the products of the reacted gases. The behavior of liquid-vapor flow induced by phase-change in a packed bed and the factors that characterize the process and affect the performance are discussed.

中文翻译：

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使用多孔材料颗粒填充床从液态甲醇被动生产合成气

摘要 研究了使用负载催化剂的多孔材料颗粒填充床从液态甲醇被动生产合成气。由于蒸发增强了毛细管作用，加热垂直管的上部填充有多孔颗粒，其中底部浸入液体甲醇中，预计会导致稳定的向上流体流动。干燥区域的出现和由此导致的温度升高会由于催化反应产生合成气，然后从管的顶端流出。在所提出的过程中，取决于多孔床中局部液体含量的毛细管力与重力和作用在液体和蒸汽上的粘性力局部平衡。液体含量、流速、压力的分布，沿着管轴的液体和蒸汽的温度和温度是使用基于每个相的质量、力和能量平衡的一维模型计算的。实验结果表明该过程的有效性，即稳定流体流动的诱导，干燥区域的出现，温度升高到反应水平，以及反应气体的产物。讨论了填充床中相变引起的液-气流动行为以及表征该过程和影响性能的因素。温度升高到反应水平，以及反应气体的产物。讨论了填充床中相变引起的液-汽流动行为以及表征该过程和影响性能的因素。温度升高到反应水平，以及反应气体的产物。讨论了填充床中相变引起的液-气流动行为以及表征该过程和影响性能的因素。