Passive production of synthesis gas from liquid methanol using a packed bed of porous material particles
Passive production of synthesis gas from liquid methanol using a packed bed of porous material particles
复制标题
使用多孔材料颗粒填充床从液态甲醇被动生产合成气
DOI：
10.1016/j.ijheatmasstransfer.2018.09.020
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发表时间：
2019
影响因子：
5.2
通讯作者：
Mikako Tanaka
中科院分区：
文献类型：
--
作者：
Kunito Okuyama;Kanoko Ichimi;Masato Takazawa;Asami Natori;Mikako Tanaka
研究了多孔材料颗粒负载催化剂填充床中液态甲醇被动制合成气的反应。加热填充有多孔颗粒的垂直管的上部，其中底部浸没在液体甲醇中，预期由于蒸发增强的毛细管作用而引起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可以由于催化反应而产生合成气，然后合成气从管的顶端流出。在所提出的方法中，毛细力，这是依赖于在多孔床中的局部液体含量，是平衡的局部重力和粘性力作用在液体和蒸汽。使用基于每个相的质量、力和能量平衡的一维模型来计算液体和蒸气的液体含量、流速、压力和温度沿着管轴的分布。实验结果表明，该过程的有效性，即，诱导稳定的流体流动，干燥区的出现，温度升高到反应水平，和反应气体的产物。讨论了填充床内相变引起的气液两相流动行为以及表征该过程和影响其性能的因素。
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.