Kui Jiang, Hengyong Xu, Andreas Goldbach,

1
1st CACHET Workshop 24th April 2007
Palladium Membrane Development in DICP

• Kui Jiang, Hengyong Xu, Andreas Goldbach,
• Chunying Yu, and Chun Bao
• Dalian Institute of Chemical Physics,
• Chinese Academy of Sciences
• xuhy_at_dicp.ac.cn

2
DICP Patented Technology for Palladium Membrane
Image of support surface
3
The Permeability of Pd Membrane on Glazed Support
4
Effect of Pressure on Membrane Stability
Room temperature
5
Effect of Pressure and Temperature on Membrane
Stability
Pure N2 40 bar at feed side 1 bar at permeation
side
6
The permeability of membrane with ECN sealing
500?
N2 permeance (10-10mol/m2.s.Pa) at 500?
7
The comparison of Permeability of Pd membrane on
glazed support and Pd membrane with ECN sealing
Pd membrane on glazed support
Pd membrane with ECN sealing
8
50 cm Long Membranes
9
Membrane Performance in H2/N2 mixture
H2/N23/1, Pretente16bar, Ppermeate1bar
10
Membrane Performance in H2/N2 mixture
H2/N23/1, Pretente16bar, Ppermeate1bar
11
Conclusions

• The palladium membrane is stable under N2
  pressure of 40 bar at 500 ?C.
• The H2 permeance of Pd membranes on glazed
  supports is generally above 710-6 mol/m2?s?Pa at
  500 ?C and the H2/N2 selectivity better than
  20000 at 1 bar pressure difference.
• Pd membranes with ECN sealing show a H2 permeance
  of 2 to 610-6 mol/m2?s?Pa at 500 ?C with ideal
  H2/N2 selectivities better than 2000.
• The H2 purity in the permeate stays above 99.8
  and the N2 flux below 210-9 mol/m2?s?Pa while
  operating a Pd membrane for 500 h between 140-450
  ?C in a 31 H2/N2 mixture at 16 bar total
  pressure.