Inorganic Microporous Membranes for Gas Separation in Fossil Fuel ...

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4 Results and discussion Mol% Carbon 0,8 0,6 0,4 0,2 0 140 400 Temperature [ºC] 105 500 600 100% 50% 0% Mol % TiO 2 in ZrO 2 Figure 72 mol% carbon in the dried DEA sols calcined at 140, 400, 500 and 600ºC for 0, 50 and 100 mol% TiO2 in ZrO2.
4 Results and discussion 4.3.4 Gas permeation The results of all He and SF6 gas permeation measurements are summarized in Figure 73. The membrane numbers are listed in Table 30. The permselectivity of the membranes that have been calcined at 400ºC and of the γ-Al2O3 membrane are all similar to what can be expected from the Knudsen diffusion (6.0). An increase in the calcination temperature, to 500ºC, results in a strong reduction of He permeation from 4⋅10 -8 mol/s⋅m 2 ⋅Pa to approximately 2⋅10 -9 mol/s⋅m 2 ⋅Pa. A calcination temperature of 600ºC causes a significant increase in the He permeance to at least 2⋅10 -8 mol/s⋅m 2 ⋅Pa and a He/SF6 permselectivity of up to 30. It should be noted that both the He and the SF6 permeability of membrane #204 significantly exceed those of all other membranes, which suggests that this particular membrane contains substantially more large pores or defects. All other results indicate that mass transport through the Ti0.5Zr0.5O2 layers calcined above 400ºC is no longer dominated by the Knudsen diffusion, but that at least for the He transport there is a substantial contribution from micropore diffusion. He Permeance (10 -8 mol/s m 2 Pa) 109 15 10 5 0 Permeance Permselectivity Double Coating Support 400ºC 400ºC 500ºC 500ºC 600ºC 600ºC #109 #206 #208 #132 #202 #205 #204 Figure 73: He permeance and He/SF6 permselectivity of Ti0.5Zr0.5O2 membranes calcined at 400, 500 and 600ºC measured at 200ºC. Table 30 Overview of characterised membranes with gas permeation Final layer Calcination temperature Membrane # γ-Al2O3 600ºC 109 Ti0.5Zr0.5O2 400ºC 206, 209 500ºC 132, 143, 202 600ºC 204, 205 106 35 30 25 20 15 10 5 0 He/SF 6 Permselectivity
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Mitglied der Helmholtz-Gemeinschaft
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Forschungszentrum Jülich GmbH Inst
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List of Abbreviations Ac Acetyl Ace
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Summary CO2 capture and storage mig
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Zusammenfassung Die Abtrennung und
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Content Content CONTENT............
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1 Introduction and aims 1 Introduct
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1 Introduction and aims Candidate m
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2 Theoretical background 2 Theoreti
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2 Theoretical background Despite th
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2 Theoretical background Table 2 Ox
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2 Theoretical background 2.1.2 Micr
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2 Theoretical background Poly-cryst
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2 Theoretical background membranes
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2 Theoretical background Dry or wet
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2 Theoretical background the materi
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2 Theoretical background Figure 9 D
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2 Theoretical background Figure 11
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2 Theoretical background due to its
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2 Theoretical background 2.3.3.2 Mi
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2 Theoretical background 2.4 Microp
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2 Theoretical background Figure 15
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2 Theoretical background wall inter
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3 Experimental 3 Experimental The m
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3 Experimental vacuum sample holder
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3 Experimental o of as-made DOH cry
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3 Experimental Another solution was
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3 Experimental 3.4 Characterisation
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3 Experimental Element analysis The
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3 Experimental Additionally, the hy
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4 Results and discussion Abundance
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4 Results and discussion 4.2 Zeolit
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Page 70 and 71: 4 Results and discussion Intensity
Page 72 and 73: 4 Results and discussion The carbon
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Page 76 and 77: 4 Results and discussion 900 [ºC]
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Page 80 and 81: 4 Results and discussion without a
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Page 90 and 91: 4 Results and discussion The averag
Page 92 and 93: 4 Results and discussion DTA µV/mg
Page 94 and 95: 4 Results and discussion Vads / cm
Page 96 and 97: 4 Results and discussion The increa
Page 98 and 99: 4 Results and discussion 20 30 40 5
Page 100 and 101: 4 Results and discussion V micro /V
Page 102 and 103: 4 Results and discussion In pure Ti
Page 104 and 105: 4 Results and discussion In summary
Page 106 and 107: 4 Results and discussion Intensity
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Page 110 and 111: 4 Results and discussion ~50nm TiO2
Page 112 and 113: 4 Results and discussion Raman Inte
Page 114 and 115: 4 Results and discussion Tungsten 5
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Page 122 and 123: 5 Conclusions and recommendations m
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Page 126 and 127: 6 References 22. Shao, Z., Dong, H.
Page 128 and 129: 6 References 65. Van den Berg, A. W
Page 130 and 131: 6 References 108. Wen, T. L., Heber
Page 132 and 133: Curriculum Vitae - George van der D
Page 134: Last but not least, I would like to
Page 137: Band | Volume 8 ISBN 978-3-89336-52
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Inorganic Microporous Membranes for Gas Separation in Fossil Fuel ...

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