نتایج جستجو برای: h2 separation

تعداد نتایج: 146783  

2015
P. Velicsanyi M. Gerstl A. Nenning H. Hutter J. Fleig

Model-type thin films of Gd doped and Gd/Mn co-doped ceria were investigated by means of impedance spectroscopy in a humid H2 atmosphere. A novel measurement technique for microelectrodes with interdigitating Pt current collectors was employed. This method allows a separation of the different elementary processes contributing to the electrode impedance. After annealing at 650°C in humid H2 atmo...

Journal: :journal of membrane science and research 0
w. n. w. salleh faculty of petroleum and renewable energy engineering, universiti teknologi malaysia, 81310 skudai, johor bahru, malaysia ahmad fauzi ismail advanced membrane technology research centre (amtec), universiti teknologi malaysia, 81310 skudai, johor bahru, malaysia

carbon membrane can be produced using a wide variety of polymer precursor materials via heat treatment process. a general concept route of precursor selection-preparation-modification-performance analysis platform for the carbon membrane has been proposed to promote the development of carbon membrane material for a wide range of application. the current review considers the recent progress of c...

Journal: :Journal of the American Chemical Society 2008
Viktoras Dryza Berwyck L J Poad Evan J Bieske

Structural properties of the B(+)-H2 electrostatic complex are investigated through its rotationally resolved infrared spectrum in the H-H stretch region (3905-3975 cm(-1)). The spectrum, which was obtained by monitoring B(+) photofragments while the IR wavelength was scanned, is consistent with the complex having a T-shaped structure and a vibrationally averaged intermolecular separation of 2....

2014
Saber Naserifar Theodore T. Tsotsis William A. Goddard Muhammad Sahimi

The atomistic model of amorphous silicon-carbide membrane that was developed in Parts I and II of this series is utilized in nonequilibrium molecular dynamics (MD) simulations to study transport and separation of equimolar gaseous mixtures H2/CO2 and H2/CH4 in the membrane at high temperatures. We simulated membranes with up to about 39 nm in thickness, containing up to 170,000 atoms, and up to...

Journal: :Chemical science 2017
Fernando Cacho-Bailo Ismael Matito-Martos Julio Perez-Carbajo Miren Etxeberría-Benavides Oğuz Karvan Víctor Sebastián Sofía Calero Carlos Téllez Joaquín Coronas

Double-layered zeolitic imidazolate framework (ZIF) membranes were fabricated inside polyimide P84 hollow fibers by a step-synthesis conducted by microfluidic technology and applied to pre-combustion gas separation. Our hypothesis, based on the information provided by a combination of molecular simulation and experiments, is that a CO2 adsorption reduction on the surface of the ZIF-9 would enha...

Journal: :ACS applied materials & interfaces 2017
Bowen Yao Salvatore Mandrà John O Curry Shamil Shaikhutdinov Hans-Joachim Freund Joshua Schrier

Membrane-based gas separation processes can address key challenges in energy and environment, but for many applications the permeance and selectivity of bulk membranes is insufficient for economical use. Theory and experiment indicate that permeance and selectivity can be increased by using two-dimensional materials with subnanometer pores as membranes. Motivated by experiments showing selectiv...

2016
Haiqing Lin

Growing evidence indicates that the CO2 emissions from the combustion of fossil fuels are contributing to global climate change. One indispensable approach to controlling CO2 emissions to the atmosphere is carbon capture, utilization and sequestration (CCUS) from large point sources, such as coal power plants. Membrane technology has emerged as an important separation technology for CO2 capture...

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