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

More documents

Recommendations

Info

4 Results and discussion Abundance % 20 15 10 5 0 1 10 100 1000 Particle size in nm 51 A 28nm B 26nm Figure 23 Particle size distribution of Boehmite sol measured twice by means of Dynamic Light Scattering The γ-Al2O3 layer obtained by dip coating is ~1 µm in thickness and can be increased to approximately 3 µm by repeating the coating and firing steps (Figure 24-A). Homogeneous γ-Al2O3 intermediate was obtained by means of spin-coating. The thickness of the twice spin-coated γ-Al2O3 intermediate is ~3 µm (using 1000 or 3000 RPM), indicating that the layer thickness is more dependent on the concentration of the Boehmite sol and the evaporation time than the actual spinning speed (Figure 24-B and C). Raman or XRD analysis could not distinguish the γ from the α-Al2O3 phase of the membranes. The γ-Al2O3 bulk material was analysed with XRD and gas physisorption after drying and firing treatments. γ-Al2O3 α- Al2O3 A B γ-Al2O3 α- Al2O3 γ-Al2O3 α- Al2O3 2-3 µm Figure 24 Cross section SEM images of γ-Al2O3 intermediate layers by dipcoating (single layer, A) or spincoating at 1000 RPM (B) and 3000 RPM (C). The γ-Al2O3 intermediate layer material calcined at 600ºC for 3 hours showed a type IV isotherm indicating a mesoporous material. XRD pattern results confirm the presence of pure γ-Al2O3 and the absence of α-Al2O3 and δ-Al2O3. The specific surface area is derived from the Brunauer, Emmet and Teller (SBET) theory. 130 The Barret, Joyner and Halenda (BJH) algorithm 130 is selected for estimating the pore size of mesoporous material that presents type IV isotherms. The BET specific surface areas are in the range C
4 Results and discussion of 205-225 m 2 /g with a median pore size of 4.1-4.6 nm (Figure 25). This is comparable with literature results. 5 VPore / cm 3 g -1 0,3 8 0,2 0,1 102 10-1 102 100 102 101 102 0,0 0 r / nm Figure 25 Pore size distribution of the γ-Al2O3 powder calcined at 600ºC for 3 hours using the BJH model. The pore volume was calculated from the absorbed gas for certain mass of powder (cm 3 /g). The green line presents the differential of the absorbed volume. 52 6 dV/dr / cm 3 nm -1 g -1 4 2
Page 1 and 2:
Mitglied der Helmholtz-Gemeinschaft
Page 4 and 5:
Forschungszentrum Jülich GmbH Inst
Page 6 and 7:
List of Abbreviations Ac Acetyl Ace
Page 8 and 9:
Summary CO2 capture and storage mig
Page 10 and 11:
Zusammenfassung Die Abtrennung und
Page 12 and 13: Content Content CONTENT............
Page 14 and 15: 1 Introduction and aims 1 Introduct
Page 16 and 17: 1 Introduction and aims Candidate m
Page 18 and 19: 2 Theoretical background 2 Theoreti
Page 20 and 21: 2 Theoretical background Despite th
Page 22 and 23: 2 Theoretical background Table 2 Ox
Page 24 and 25: 2 Theoretical background 2.1.2 Micr
Page 26 and 27: 2 Theoretical background Poly-cryst
Page 28 and 29: 2 Theoretical background membranes
Page 30 and 31: 2 Theoretical background Dry or wet
Page 32 and 33: 2 Theoretical background the materi
Page 34 and 35: 2 Theoretical background Figure 9 D
Page 36 and 37: 2 Theoretical background Figure 11
Page 38 and 39: 2 Theoretical background due to its
Page 40 and 41: 2 Theoretical background 2.3.3.2 Mi
Page 42 and 43: 2 Theoretical background 2.4 Microp
Page 44 and 45: 2 Theoretical background Figure 15
Page 46 and 47: 2 Theoretical background wall inter
Page 48 and 49: 3 Experimental 3 Experimental The m
Page 50 and 51: 3 Experimental vacuum sample holder
Page 52 and 53: 3 Experimental o of as-made DOH cry
Page 54 and 55: 3 Experimental Another solution was
Page 56 and 57: 3 Experimental 3.4 Characterisation
Page 58 and 59: 3 Experimental Element analysis The
Page 60 and 61: 3 Experimental Additionally, the hy
Page 64 and 65: 4 Results and discussion 4.2 Zeolit
Page 66 and 67: 4 Results and discussion Table 14 D
Page 68 and 69: 4 Results and discussion hours usin
Page 70 and 71: 4 Results and discussion Intensity
Page 72 and 73: 4 Results and discussion The carbon
Page 74 and 75: 4 Results and discussion DOH crysta
Page 76 and 77: 4 Results and discussion 900 [ºC]
Page 78 and 79: 4 Results and discussion characteri
Page 80 and 81: 4 Results and discussion without a
Page 82 and 83: 4 Results and discussion 4.3.1.1 Ke
Page 84 and 85: 4 Results and discussion Solid Cont
Page 86 and 87: 4 Results and discussion difference
Page 88 and 89: 4 Results and discussion V [cm ads
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
Page 108 and 109: 4 Results and discussion nanonic YS
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
Page 116 and 117:
4 Results and discussion Mol% Carbo
Page 118 and 119:
4 Results and discussion Permeance
Page 120 and 121:
4 Results and discussion He Permean
Page 122 and 123:
5 Conclusions and recommendations m
Page 124 and 125:
5 Conclusions and recommendations m
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
show all

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

Create successful ePaper yourself

Delete template?

Save as template?