Overcoming pressure drop losses in membrane reactors by semi-batch operation

N. Kageyama, P. Hacarlioglu, A. Takagaki, R. Kikuchi, S. T. Oyama

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

The feasibility of harnessing the increase in moles in certain equilibrium-limited reactions to alleviate the pressure driving force requirement for permeation through membranes is demonstrated. The studies are conducted in a packed-bed membrane reactor operated as a semi-batch membrane reactor (SBMR) to capture the pressure generating potential of the reaction. The actual system investigated is the steam methane reforming, a reaction in which the number of moles doubles, carried out at various temperatures (873 K and 923 K) and pressures (0.5–1.5 MPa) with a Ni/MgAl2O4 catalyst. A silica-alumina membrane with a hydrogen permeance of 2.2 × 10−7 mol m−2 s−1 Pa−1 at 923 K prepared by chemical vapor deposition was used in the membrane reactor. The hydrogen productivities obtained in the SBMR were compared with the productivities obtained in a membrane reactor operated at the same conditions. At low pressures (0.5, 1.0 MPa) the hydrogen productivities of the SBMR were comparable to those obtained with the continuous membrane reactor, but at high pressure (1.5 MPa) the SBMR showed superior performance. One-dimensional modeling studies gave good agreement between simulated and experimental results obtained from both reactor types. Based on these calculations, further estimations on hydrogen productivities were made at high pressures. These results indicated that the SBMR improved the hydrogen production when the steam methane reforming was conducted above 1.5 MPa. The SBMR described here could be utilized in a system where multiple units would be arranged to undertake parallel filling and discharge operations, much akin to the arrangement used in a pressure swing adsorption system.

本文言語英語
ページ(範囲)175-185
ページ数11
ジャーナルSeparation and Purification Technology
185
DOI
出版ステータス出版済み - 2017
外部発表はい

All Science Journal Classification (ASJC) codes

  • 分析化学
  • ろ過および分離

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