Chemical Diffusion and Hydrogen Separation Properties of Lanthenum Ferrite and Doped Ceria Composite Mixed Conductors

2008 ◽  
pp. 91-98
Author(s):  
Annamalai Karthikeyan ◽  
Hengdong Cui ◽  
Srikanth Gopalan ◽  
Uday B. Pal
Keyword(s):  
Chemical Diffusion ◽  
Hydrogen Separation ◽  
Mixed Conductors ◽  
Doped Ceria

Exceptional hydrogen permeation of all-ceramic composite robust membranes based on BaCe0.65Zr0.20Y0.15O3−δ and Y- or Gd-doped ceria

2015 ◽  
Vol 8 (12) ◽  
pp. 3675-3686 ◽  
Author(s):  
Elena Rebollo ◽  
Cecilia Mortalò ◽  
Sonia Escolástico ◽  
Stefano Boldrini ◽  
Simona Barison ◽  
...  
Keyword(s):  
Ceramic Composite ◽  
Hydrogen Permeation ◽  
Ceramic Composites ◽  
Hydrogen Separation ◽  
Doped Ceria ◽  
Separation Membranes ◽  
All Ceramic

Mixed proton and electron conductor ceramic composites were examined as hydrogen separation membranes at moderate temperatures (higher than 500 °C).

Protonic Mobility of Neodymium Tungstate

2017 ◽  
Vol 14 (4) ◽  
Author(s):  
Vladislav A. Sadykov ◽  
Yulia N. Bespalko ◽  
Svetlana N. Pavlova ◽  
Pavel I. Skriabin ◽  
Alexey V. Krasnov ◽  
...  
Keyword(s):  
Abrupt Change ◽  
Chemical Diffusion ◽  
Tracer Diffusion ◽  
Hydrogen Separation ◽  
X Ray Diffraction ◽  
Efficient Operation ◽  
X Ray ◽  
Separation Membranes ◽  
Temperature Programmed ◽  
Better Than

This work aims at studying protonic transport of mixed proton–electron-conducting Nd5.5WO11.25-δ oxide synthesized by a citrate method as material for hydrogen separation membranes. Structure of samples was characterized by X-ray diffraction (XRD), and protonic mobility was studied using temperature-programmed desorption of H2O and isotope heteroexchange of the bulk protons with D2O as well as mass relaxation after an abrupt change of H2O partial pressure. The temperature range of Nd5.5WO11.25-δ efficient operation is 300–400 °C, where H+ tracer diffusion and chemical diffusion coefficients are ∼1 × 10−11 and ∼2 × 10−5 cm2/s, respectively, being comparable to or even better than those for similar systems. Hence, Nd5.5WO11.25-δ is a promising material for the design of hydrogen separation membranes.

Gd-doped ceria enhanced triple-conducting membrane for efficient hydrogen separation

2021 ◽  
Vol 256 ◽  
pp. 117798
Author(s):  
Lujian Jia ◽  
Mengke Liu ◽  
Xia Xu ◽  
Weichao Dong ◽  
Heqing Jiang
Keyword(s):  
Hydrogen Separation ◽  
Doped Ceria
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