Details

Autor(en) / Beteiligte

• Moriyama, Norihiro
• Nagasawa, Hiroki
• Kanezashi, Masakoto
• Tsuru, Toshinori

Titel

Selective water vapor permeation from steam/non-condensable gas mixtures via organosilica membranes at moderate-to-high temperatures

Ist Teil von

• Journal of membrane science, 2019-11, Vol.589, p.117254, Article 117254

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2019

Quelle

Elsevier ScienceDirect Journals

Beschreibungen/Notizen

• The removal of water vapor from humid gas streams is important for steam recovery in power plants and reaction enhancement in a membrane reactor that produces water as a by-product, and so on. The prospect of future applications for organosilica membranes in these fields prompted the present investigation of humid gas separation properties via 1,2-bis(triethoxysilyl)ethane (BTESE)-derived membranes. In this work, binary humid gas separation (H2O/H2 and H2O/N2) was performed on BTESE-derived membranes at temperatures ranging from 80 to 200 °C under feeds of water mole fractions ranging from 0.1 to 0.9. Permeance and the permeance ratios of H2O/H2 and H2O/N2 were confirmed to be dependent on temperature and vapor pressure, and found to be correlated using the water adsorption potential, which accounted for both the temperature and the vapor pressure. The highest levels of water permeate flux, permeance, and permeance ratios of H2O/H2 and H2O/N2 were 37 kg/(m2 h), 5.5 × 10−6 mol/(m2 s Pa)), and 84 and infinity (>6700), respectively, at 150 °C where the partial pressure difference of water across the membrane was 107 kPa. The high performance of BTESE-derived organosilica membranes shows promise for their future applications in humid gas separation at moderate-to-high temperatures. •BTESE-derived membranes were prepared via sol-gel method.•BTESE membranes were applied to binary steamed-gas separation at 80–200 °C.•High water permeability and selectivity were obtained in steamed-gas separation.•Hydrothermal stability of the membranes was confirmed.•Permeances in steamed-gas were correlated with adsorption potential.