Chemistry 3 (2015 8) 359-369 ~ ~ ~ УДК 533.15:546.291 Effect of Acid Leaching on Helium and Neon Permeability of Microspherical Membranes Based on Cenospheres Elena S. Rogovenko, Vladimir V. Yumashev and Elena V. Fomenko* Institute of Chemistry and Chemical Technology SB RAS 50/24 Akademgorodok, Krasnoyarsk, 660036, Russia Received 11.05.2015, received in revised form 16.06.2015, accepted 24.08.2015 The microspherical membranes based on narrow fraction of cenospheres with high permeability to helium and high selectivity for He/Ne were recovered from cenosphere concentrate from Ekibastuz coal combustion. <...> Acid leaching of the obtained microspherical membranes by 8.6M HNO3 contribute to microporosity development in their shell (volume percentage of the micropore with predominant sizes of 5, 6.4 and 13 Е was increased from 6.7 to 34.0 vol. <...> %).This led to increase in helium permeation at T=298 K about to 2 times, i.e. up to a value of 2.27·10-18 (mol·m)/(m2 , USA) in helium permeation to 37-57 times, and the polymeric membrane material –(poly)sulphone in selectivity for He/Ne to 34-52 times. <...> The obtained microspherical membranes are characterized by high selectivity α(He/Ne)=170 at 553K, and exceed the synthetic glass hollow microspheres 3M K37 Glass Bubbles (3MTM # 359 # Elena S. Rogovenko, Vladimir V. Yumashev… <...> Влияние кислотного травления на проницаемость микросферических мембран на основе ценосфер в отношении гелия и неона Е.С. Роговенко, В.В. Юмашев, Е.В. Фоменко Институт химии и химической технологии СО РАН Россия, 660036, Красноярск, Академгородок, 50/24 На основе узкой фракции ценосфер, выделенной из концентрата ценосфер от сжигания экибастузского угля, получены микросферические мембраны, характеризующиеся высоким уровнем <...>