Upgrading of Simulated Syngas by Using a Nanoporous Silica Membrane Reactor

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Abstract

The permeance properties of a nanoporous silica membrane were first evaluated in a laboratory-scale porous silica membrane reactor (MR). The results indicated that CO, CO2, and N2 inhibited H2 permeation. Increased H2 permeability and selectivity were obtained when gas was transferred from the lumen side to the shell side. This was therefore selected as a suitable permeation direction. On this basis, upgrading of simulated syngas was experimentally investigated as a function of temperature (150-300°C), feed pressure (up to 0.4MPa), and gas hourly space velocity (GHSV), by using a nanoporous silica MR in the presence of a Cu/ZnO/Al2O3 catalyst. The CO conversion obtained with the MR was significantly higher than that with a packed-bed reactor (PBR) and broke the thermodynamic equilibrium of a PBR at 275-300°C and a GHSV of 2665h-1. The use of a low GHSV and high feed pressure improved the CO conversion and led to the recovery of more H2. Upgrading of simulated syngas was investigated by using a nanoporous silica membrane reactor. Increased H2 permeability and selectivity were obtained when gas was transferred from the lumen side to the shell side. In the membrane reactor, the CO conversion broke the thermodynamic equilibrium.

Original languageEnglish
Pages (from-to)650-656
Number of pages7
JournalChemical Engineering and Technology
Volume36
Issue number4
DOIs
Publication statusPublished - Apr 2013
Externally publishedYes

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Keywords

  • Nanoporous silica membrane
  • Syngas upgrading
  • Water-gas shift reaction

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering

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