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Two-stage membrane separation process for biohydrogen recovery

Búcsú D., Bélafi-Bakó K., Pientka Z.

Environment Protection Engineering

2005

Vol. 31, nr 3-4

33-38

Porous and non-porous gas separation membranes were used for concentration of biohydrogen produced by a heterotrophic hyper-thermophilic, anaerobic micro-organisms. A laboratory-scale integrated system was designed and built based on a liquid seal system and more than 70% hydrogen concentration was achieved from the initial gaseous mixture containing hydrogen, carbon dioxide and nitrogen. Liquid absorption and desorption of the carbon dioxide were also studied.

Polyimide - silica hybrid materials

Sysel P., Pulec R., Brožová L., Pientka Z., Bleha M.

Prace Naukowe Katedry Budowy Maszyn. Seria Konferencje / Politechnika Śląska

1998

nr 1, t. 2

91-94

Polyimide-silica hybrid films with covalently bound phases were prepared via a sol - gel process. The starting materials were p-aminophenyltrimethoxysilane terminated poly(amic acid)s of controlled molecular weight and tetramethoxysilane. The actual extent of the sol-gel process was monitored by thermogravimetric analysis. The dependence of the membrane properties on the silica content and/or concentration of bonds between phases was studied.Pč/!