The simulation study on the water-gas shift reaction with a membrane reactor

• Main Authors: Mu-rong Lin, 林牧融
• Other Authors: Wei-shin Chen
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/91509068471498255639

碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 96 === Coal gasification is one of the useful approaches for hydrogen production. However, the syngas of coal gasification contains not only a high concentration of hydrogen, but also a relatively high concentration of carbon monoxide. The carbon monoxide in syngas can be transformed to hydrogen by the water-gas shift reaction through appropriate catalyst, raising the content of hydrogen in the syngas. If a membrane reactor, using Pd or Pd alloy membrane to separate the produced hydrogen from the reactor, is used for the water-gas shift reaction, the total hydrogen produced will reach an amount higher than the thermodynamic-equilibrium limit allows. In the present study, a numerical model was developed for the water-gas shift reaction in a membrane reactor. The physical models include: the high-temperature water-gas shift reaction model, the low-temperature water-gas shift reaction model, the flow model in a catalytic porous medium and the model for hydrogen permeating through a membrane. The numerical model is applied to the analysis of the influence of a membrane reactor on the water-gas shift reaction.