scholarly journals Preparation Technique of a Single Pd Membrane Using Electroless Plating for Hydrogen Permeation

2014 ◽  
Vol 39 (1) ◽  
pp. 1-5
Author(s):  
Masakazu Mukaida ◽  
Nobuo Takahashi ◽  
Misaki Ishitsuka ◽  
Shigeki Hara ◽  
Hiroyuki Suda ◽  
...  
Keyword(s):  
Electroless Plating ◽  
Hydrogen Permeation ◽  
Preparation Technique ◽  
Pd Membrane

Pure Ni and Pd-Ni Alloy Membranes Prepared by Electroless Plating for Hydrogen Separation

2011 ◽  
Vol 179-180 ◽  
pp. 1309-1313 ◽  
Author(s):  
Xiao Liang Zhang ◽  
Xu Feng Xie ◽  
Yan Huang
Keyword(s):  
Electroless Plating ◽  
Hydrogen Permeation ◽  
Hydrogen Permeability ◽  
Composite Membranes ◽  
Hydrogen Separation ◽  
High Hydrogen ◽  
Ni Alloy ◽  
Plating Method ◽  
Fcc Phase ◽  
The Ideal

Pd-based composite membranes are the attractive membrane materials for hydrogen separation due to their high hydrogen permeability and infinite permselectivity. Thin pure Ni and Pd-Ni alloy membranes with high hydrogen permeation were prepared by the electroless plating method. It is difficult to prepare the dense pure Ni membranes with 1-2 μm thickness for hydrogen separation. However, Pd-Ni alloy membranes with several micrometers thickness showed good permeation performance. Hydrogen permeance of the Pd95Ni5 alloy membrane with fcc phase up to 3.1×10-6 mol/m2 s Pa and the ideal permselectivity over 600 were obtained at 773 K.

Preparation of Pd/Ag Film on Porous Ceramic Tube by Osmosis Pressure–Assisted Electroless Plating

2011 ◽  
Vol 199-200 ◽  
pp. 426-430
Author(s):  
Bo Quan Jiang ◽  
Jiang Nan Zhang ◽  
Yu De Liu ◽  
Jian Guo Zou
Keyword(s):  
Electroless Plating ◽  
Hydrogen Permeation ◽  
Sucrose Solution ◽  
Porous Ceramic ◽  
Film Surface ◽  
Solution Concentration ◽  
Alloy Film ◽  
Molar Ratio ◽  
Optimal Conditions ◽  
Permeation Properties

The osmosis pressure was introduced to improve the conventional electroless plating process for preparing porous ceramic supported Pd/Ag inorganic composite membrane. The effects of temperature (t), molar ratio of hydrazine to total metal ions(y), molar ratio of silver ions to palladium ions(x), concentrations of ethylene diamine tetraacetic acid (EDTA) and sucrose solution on the metal deposition rate, silver content in alloy film, surface morphology of film and permeation properties of the membrane were investigated and their optimal conditions were determined to be: [MET]=5mM, x = 20%, y = 1, [EDTA] = 40g•L-1, t = 40 °C, pH =11 and sucrose solution concentration of 6 M. Under these optimal conditions, the prepared Pd/Ag alloy film with thickness of 7.9 μm demonstrated good permeation properties with nitrogen free and hydrogen permeation rate of 8.8×10-3m3•m-2•s-1at 0.3 MPa and 473 K.

Fabrications and Evaluations of Hydrogen Permeation on TiN-5wt%Ni Membrane by Spark Plasma Sintering

2009 ◽  
Vol 620-622 ◽  
pp. 13-16
Author(s):  
Kyeong Il Kim ◽  
Tae Whan Hong
Keyword(s):  
High Temperature ◽  
Hydrogen Embrittlement ◽  
Spark Plasma Sintering ◽  
Fossil Fuel ◽  
Hydrogen Permeation ◽  
Pd Membrane ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Hydrogen Selectivity ◽  
Vibration Mill

Many laboratories have researched membrane for gasification of coal technique, separating hydrogen from fossil fuel. In general, Pd membrane of separating hydrogen is very good a property of hydrogen selectivity on high temperature, but it has some problems, hydrogen embrittlement and costly material. So, we need some materials of good properties about hydrogen selectivity instead of Pd. In this research, we fabricate membrane for hydrogen permeation, that is great in resistance to acids and chemically steady TiN. Our laboratory investigated about hydrogen selectivity. TiN powder is milled 30, 60 and 240 minutes by vibration mill, respectively. After than the samples put in operate spark plasma sintering. We analyze XRD, SEM, BET and TG/DSC. Also, in this research take an inspect hydrogen selectivity by ourselves manufactured Sievert’s type hydrogen permeation membrane equipment.

A numerical approach of conjugate hydrogen permeation and polarization in a Pd membrane tube

2012 ◽  
Vol 37 (17) ◽  
pp. 12666-12679 ◽  
Author(s):  
Wei-Hsin Chen ◽  
Wei-Ze Syu ◽  
Chen-I. Hung ◽  
Yu-Li Lin ◽  
Chang-Chung Yang
Keyword(s):  
Hydrogen Permeation ◽  
Numerical Approach ◽  
Pd Membrane ◽  
Membrane Tube

Selective Deposition of Pd on Porous Alumina Support Using Supercritical CO2

2002 ◽  
Vol 752 ◽  
Author(s):  
Masahiko Matsukata ◽  
Takashi Nishizuka ◽  
Yasushi Sekine ◽  
Eiichi Kikuchi
Keyword(s):  
Thermal Decomposition ◽  
Supercritical Co2 ◽  
Hydrogen Permeation ◽  
Porous Alumina ◽  
Diffusion Mechanism ◽  
Pore Filling ◽  
Alumina Support ◽  
Hydrogen Flux ◽  
Pd Membrane ◽  
High Separation

ABSTRACTA Pd/α-Al2O3 composite membrane was prepared on a porous α-Al2O3 disk via the thermal decomposition of bis(hexafluoroacetylacetonato)Pd(II), Pd(hfac)2. Pd(hfac)2 was dissolved in supercritical CO2 at 303 K, supplied to the substrate, and thermally decomposed at 403 and 443 K. The decomposition of Pd(hfac)2 at 443 K resulted in a sufficient pore filling of substrate with Pd as well as the formation of a thin Pd top layer. The hydrogen flux through this membrane was about 1.7 times than that of a electro-less plating Pd membrane with about 20 μm thick. Hydrogen permeation was governed by the solution-diffusion mechanism which gave a high separation selectivity.

scholarly journals Electroless Plating of High-Performance Composite Pd Membranes with EDTA-Free Bath

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4894
Author(s):  
Jun-Yi Wang ◽  
Yen-Hsun Chi ◽  
Jin-Hua Huang
Keyword(s):  
Electroless Plating ◽  
High Performance ◽  
High Selectivity ◽  
Hydrogen Permeation ◽  
Low Cost ◽  
Cycling Stability ◽  
Plating Bath ◽  
High Hydrogen ◽  
High Performance Composite ◽  
Sequential Addition

High-performance composite Pd membranes were successfully fabricated using electroless plating with an EDTA-free bath. The plating started with employing the one-time addition of hydrazine. In the experiment, the hydrazine concentrations and plating bath volumes were systematically varied to optimize the plating. The optimum composite Pd membrane tube showed high H2 permeance of 4.4 × 10−3 mol/m2 s Pa0.5 and high selectivity of 1.6 × 104, but poor cycling stability. Then, a method of sequential addition of the hydrazine from the high to low concentrations was employed. The resultant membrane, about 6 μm thick, still exhibited a high selectivity of 6.8 × 104 as well as a much-improved plating yield and cycling stability level; this membrane outperformed the membrane made using the unmodified plating technique with the EDTA-contained bath. This result indicates the EDTA-free bath combined with the sequential addition of hydrazine is a simple, low-cost, yet effective method for preparing thin, dense composite Pd membranes featuring high hydrogen permeation flux and high thermal durability.

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