The Experts below are selected from a list of 96 Experts worldwide ranked by ideXlab platform
Joël Patarin - One of the best experts on this subject based on the ideXlab platform.
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High-Pressure Water Intrusion Investigation of Pure Silica ITQ-7 Zeolite
The Journal of Physical Chemistry C, 2013Co-Authors: Lydie Tzanis, Bernd Marler, Hermann Gies, Joël PatarinAbstract:Experimental water Intrusion–extrusion isotherms were recorded at room temperature on pure silica ISV-type zeolite (ITQ-7 zeosil) possessing a 3D channel system. The water Intrusion is obtained by applying a high hydraulic pressure corresponding to the Intrusion step. When the pressure is released, the water extrusion occurs but at a lower pressure to that of the Intrusion one. The ITQ-7 zeosil–water system behaves like a shock-absorber, but the phenomenon is nonreproducible. Several characterizations have been realized before and after water Intrusion–extrusion experiments in order to reveal the presence or the absence of defects after such experiments. Structural modifications at the long-range order can be observed by XRD analysis after Intrusion. At the short-range order, solid-state NMR spectroscopy shows evidence of the presence of Q2 ((HO−)2Si(−OSi)2) and Q3 ((HO–Si(−OSi)3) or (Si(−OSi)3O–)) groups revealing the breaking of some siloxane bridges after the Intrusion step. The amount of defects incre...
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High pressure water Intrusion Investigation of pure silica 1D channel AFI, MTW and TON-type zeolites
Microporous and Mesoporous Materials, 2011Co-Authors: Lydie Tzanis, Michel Soulard, Mickaël Trzpit, Joël PatarinAbstract:Abstract Experimental water Intrusion–extrusion isotherms were performed at room temperature on various 1D channel pure silica AFI, MTW and TON-type zeolites. The water Intrusion is obtained by applying a high hydraulic pressure corresponding to the Intrusion step. Whatever, the zeosil, when the pressure is released, the water extrusion occurs at a similar pressure to that of the Intrusion one. These “zeosil–water” systems behave like a spring and the phenomenon is reproducible over several cycles. Several characterizations have been realized before and after water Intrusion–extrusion experiments in order to reveal the presence or the absence of defects after such experiments. For all samples, no structural modifications at the long range order are observed by XRD analysis. However for the MTW-type zeosil, solid state NMR spectroscopy get evidence of the presence of Q2 and Q3 groups revealing the breaking of some siloxane bridges. Nevertheless, the amount of defects is very low (
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High-Pressure Water Intrusion Investigation of Pure Silica RUB-41 and S-SOD Zeolite Materials
The Journal of Physical Chemistry C, 2010Co-Authors: Mohamed Ali Saada, Bernd Marler, Hermann Gies, Michel Soulard, Joël PatarinAbstract:The energetic performance of two microporous siliceous materials, RUB-41 (RRO structure type) and S-SOD (SOD structure type) possessing medium-sized and very small pore openings, respectively, were studied using high-pressure water Intrusion−extrusion experiments at room temperature. The pressure−volume diagrams of the RUB-41 material indicate a partly reversible phenomenon showing a slight hysteresis at the extrusion stage, which reveals that the water− RUB-41 system displays a shock-absorber behavior. Moreover, a shift toward the low pressure range was detected between the first cycle of water Intrusion and the second one, indicating the creation of new defect sites in the inorganic framework after the Intrusion process. Several Investigations, mainly by 29Si solid-state NMR spectroscopy, confirm this observation. For the S-SOD material, no water Intrusion was observed after three water Intrusion−extrusion cycles. The highly hydrophobic character of the S-SOD material with its small pore opening or the ...
Lydie Tzanis - One of the best experts on this subject based on the ideXlab platform.
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High-Pressure Water Intrusion Investigation of Pure Silica ITQ-7 Zeolite
The Journal of Physical Chemistry C, 2013Co-Authors: Lydie Tzanis, Bernd Marler, Hermann Gies, Joël PatarinAbstract:Experimental water Intrusion–extrusion isotherms were recorded at room temperature on pure silica ISV-type zeolite (ITQ-7 zeosil) possessing a 3D channel system. The water Intrusion is obtained by applying a high hydraulic pressure corresponding to the Intrusion step. When the pressure is released, the water extrusion occurs but at a lower pressure to that of the Intrusion one. The ITQ-7 zeosil–water system behaves like a shock-absorber, but the phenomenon is nonreproducible. Several characterizations have been realized before and after water Intrusion–extrusion experiments in order to reveal the presence or the absence of defects after such experiments. Structural modifications at the long-range order can be observed by XRD analysis after Intrusion. At the short-range order, solid-state NMR spectroscopy shows evidence of the presence of Q2 ((HO−)2Si(−OSi)2) and Q3 ((HO–Si(−OSi)3) or (Si(−OSi)3O–)) groups revealing the breaking of some siloxane bridges after the Intrusion step. The amount of defects incre...
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High pressure water Intrusion Investigation of pure silica 1D channel AFI, MTW and TON-type zeolites
Microporous and Mesoporous Materials, 2011Co-Authors: Lydie Tzanis, Michel Soulard, Mickaël Trzpit, Joël PatarinAbstract:Abstract Experimental water Intrusion–extrusion isotherms were performed at room temperature on various 1D channel pure silica AFI, MTW and TON-type zeolites. The water Intrusion is obtained by applying a high hydraulic pressure corresponding to the Intrusion step. Whatever, the zeosil, when the pressure is released, the water extrusion occurs at a similar pressure to that of the Intrusion one. These “zeosil–water” systems behave like a spring and the phenomenon is reproducible over several cycles. Several characterizations have been realized before and after water Intrusion–extrusion experiments in order to reveal the presence or the absence of defects after such experiments. For all samples, no structural modifications at the long range order are observed by XRD analysis. However for the MTW-type zeosil, solid state NMR spectroscopy get evidence of the presence of Q2 and Q3 groups revealing the breaking of some siloxane bridges. Nevertheless, the amount of defects is very low (
Bernd Marler - One of the best experts on this subject based on the ideXlab platform.
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High-Pressure Water Intrusion Investigation of Pure Silica ITQ-7 Zeolite
The Journal of Physical Chemistry C, 2013Co-Authors: Lydie Tzanis, Bernd Marler, Hermann Gies, Joël PatarinAbstract:Experimental water Intrusion–extrusion isotherms were recorded at room temperature on pure silica ISV-type zeolite (ITQ-7 zeosil) possessing a 3D channel system. The water Intrusion is obtained by applying a high hydraulic pressure corresponding to the Intrusion step. When the pressure is released, the water extrusion occurs but at a lower pressure to that of the Intrusion one. The ITQ-7 zeosil–water system behaves like a shock-absorber, but the phenomenon is nonreproducible. Several characterizations have been realized before and after water Intrusion–extrusion experiments in order to reveal the presence or the absence of defects after such experiments. Structural modifications at the long-range order can be observed by XRD analysis after Intrusion. At the short-range order, solid-state NMR spectroscopy shows evidence of the presence of Q2 ((HO−)2Si(−OSi)2) and Q3 ((HO–Si(−OSi)3) or (Si(−OSi)3O–)) groups revealing the breaking of some siloxane bridges after the Intrusion step. The amount of defects incre...
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High-Pressure Water Intrusion Investigation of Pure Silica RUB-41 and S-SOD Zeolite Materials
The Journal of Physical Chemistry C, 2010Co-Authors: Mohamed Ali Saada, Bernd Marler, Hermann Gies, Michel Soulard, Joël PatarinAbstract:The energetic performance of two microporous siliceous materials, RUB-41 (RRO structure type) and S-SOD (SOD structure type) possessing medium-sized and very small pore openings, respectively, were studied using high-pressure water Intrusion−extrusion experiments at room temperature. The pressure−volume diagrams of the RUB-41 material indicate a partly reversible phenomenon showing a slight hysteresis at the extrusion stage, which reveals that the water− RUB-41 system displays a shock-absorber behavior. Moreover, a shift toward the low pressure range was detected between the first cycle of water Intrusion and the second one, indicating the creation of new defect sites in the inorganic framework after the Intrusion process. Several Investigations, mainly by 29Si solid-state NMR spectroscopy, confirm this observation. For the S-SOD material, no water Intrusion was observed after three water Intrusion−extrusion cycles. The highly hydrophobic character of the S-SOD material with its small pore opening or the ...
Hermann Gies - One of the best experts on this subject based on the ideXlab platform.
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High-Pressure Water Intrusion Investigation of Pure Silica ITQ-7 Zeolite
The Journal of Physical Chemistry C, 2013Co-Authors: Lydie Tzanis, Bernd Marler, Hermann Gies, Joël PatarinAbstract:Experimental water Intrusion–extrusion isotherms were recorded at room temperature on pure silica ISV-type zeolite (ITQ-7 zeosil) possessing a 3D channel system. The water Intrusion is obtained by applying a high hydraulic pressure corresponding to the Intrusion step. When the pressure is released, the water extrusion occurs but at a lower pressure to that of the Intrusion one. The ITQ-7 zeosil–water system behaves like a shock-absorber, but the phenomenon is nonreproducible. Several characterizations have been realized before and after water Intrusion–extrusion experiments in order to reveal the presence or the absence of defects after such experiments. Structural modifications at the long-range order can be observed by XRD analysis after Intrusion. At the short-range order, solid-state NMR spectroscopy shows evidence of the presence of Q2 ((HO−)2Si(−OSi)2) and Q3 ((HO–Si(−OSi)3) or (Si(−OSi)3O–)) groups revealing the breaking of some siloxane bridges after the Intrusion step. The amount of defects incre...
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High-Pressure Water Intrusion Investigation of Pure Silica RUB-41 and S-SOD Zeolite Materials
The Journal of Physical Chemistry C, 2010Co-Authors: Mohamed Ali Saada, Bernd Marler, Hermann Gies, Michel Soulard, Joël PatarinAbstract:The energetic performance of two microporous siliceous materials, RUB-41 (RRO structure type) and S-SOD (SOD structure type) possessing medium-sized and very small pore openings, respectively, were studied using high-pressure water Intrusion−extrusion experiments at room temperature. The pressure−volume diagrams of the RUB-41 material indicate a partly reversible phenomenon showing a slight hysteresis at the extrusion stage, which reveals that the water− RUB-41 system displays a shock-absorber behavior. Moreover, a shift toward the low pressure range was detected between the first cycle of water Intrusion and the second one, indicating the creation of new defect sites in the inorganic framework after the Intrusion process. Several Investigations, mainly by 29Si solid-state NMR spectroscopy, confirm this observation. For the S-SOD material, no water Intrusion was observed after three water Intrusion−extrusion cycles. The highly hydrophobic character of the S-SOD material with its small pore opening or the ...
Michel Soulard - One of the best experts on this subject based on the ideXlab platform.
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High pressure water Intrusion Investigation of pure silica 1D channel AFI, MTW and TON-type zeolites
Microporous and Mesoporous Materials, 2011Co-Authors: Lydie Tzanis, Michel Soulard, Mickaël Trzpit, Joël PatarinAbstract:Abstract Experimental water Intrusion–extrusion isotherms were performed at room temperature on various 1D channel pure silica AFI, MTW and TON-type zeolites. The water Intrusion is obtained by applying a high hydraulic pressure corresponding to the Intrusion step. Whatever, the zeosil, when the pressure is released, the water extrusion occurs at a similar pressure to that of the Intrusion one. These “zeosil–water” systems behave like a spring and the phenomenon is reproducible over several cycles. Several characterizations have been realized before and after water Intrusion–extrusion experiments in order to reveal the presence or the absence of defects after such experiments. For all samples, no structural modifications at the long range order are observed by XRD analysis. However for the MTW-type zeosil, solid state NMR spectroscopy get evidence of the presence of Q2 and Q3 groups revealing the breaking of some siloxane bridges. Nevertheless, the amount of defects is very low (
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High-Pressure Water Intrusion Investigation of Pure Silica RUB-41 and S-SOD Zeolite Materials
The Journal of Physical Chemistry C, 2010Co-Authors: Mohamed Ali Saada, Bernd Marler, Hermann Gies, Michel Soulard, Joël PatarinAbstract:The energetic performance of two microporous siliceous materials, RUB-41 (RRO structure type) and S-SOD (SOD structure type) possessing medium-sized and very small pore openings, respectively, were studied using high-pressure water Intrusion−extrusion experiments at room temperature. The pressure−volume diagrams of the RUB-41 material indicate a partly reversible phenomenon showing a slight hysteresis at the extrusion stage, which reveals that the water− RUB-41 system displays a shock-absorber behavior. Moreover, a shift toward the low pressure range was detected between the first cycle of water Intrusion and the second one, indicating the creation of new defect sites in the inorganic framework after the Intrusion process. Several Investigations, mainly by 29Si solid-state NMR spectroscopy, confirm this observation. For the S-SOD material, no water Intrusion was observed after three water Intrusion−extrusion cycles. The highly hydrophobic character of the S-SOD material with its small pore opening or the ...
