The Experts below are selected from a list of 7647 Experts worldwide ranked by ideXlab platform
Ines E. Collings - One of the best experts on this subject based on the ideXlab platform.
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The elastic behavior of zeolitic frameworks: The case of MFI type zeolite under high-pressure methanol intrusion
Catalysis Today, 2020Co-Authors: D. Comboni, F. Pagliaro, Paolo Lotti, G. Diego Gatta, Marco Merlini, Sula Milani, Massimo Migliori, Girolamo Giordano, Enrico Catizzone, Ines E. CollingsAbstract:Abstract The high-pressure behavior of six synthetic zeolites with the MFI topology, characterized by different chemical composition (framework-Si partially replaced by Al or B and counterbalanced by Na or H as extra-framework cations), has been investigated by in-situ powder synchrotron X-ray diffraction using silicone-oil and methanol as hydrostatic pressure-transmitting fluids. For each sample, the compressibility in silicone-oil has been found to be considerably higher than that in methanol. This difference in terms of Bulk Elasticity is due to the adsorption of methanol already at P
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The elastic behavior of zeolitic frameworks : The case of MFI type zeolite under high-pressure methanol intrusion
'Elsevier BV', 2020Co-Authors: D. Comboni, F. Pagliaro, Paolo Lotti, G. Diego Gatta, Marco Merlini, Sula Milani, Massimo Migliori, Girolamo Giordano, Enrico Catizzone, Ines E. CollingsAbstract:The high-pressure behavior of six synthetic zeolites with the MFI topology, characterized by different chemical composition (framework-Si partially replaced by Al or B and counterbalanced by Na or H as extra-framework cations), has been investigated by in-situ powder synchrotron X-ray diffraction using silicone-oil and methanol as hydrostatic pressure-transmitting fluids. For each sample, the compressibility in silicone-oil has been found to be considerably higher than that in methanol. This difference in terms of Bulk Elasticity is due to the adsorption of methanol already at P < 0.1 GPa, with different magnitudes as a function of the sample crystal-chemistry. The high number of experimental pressure points allowed an accurate determination of the monoclinic-to-orthorhombic phase transition (MOPT), detected between 0.3 and 0.7 GPa in the samples compressed in silicone-oil, whereas the orthorhombic Pnma polymorph has been found to be stable already at ∼ 0.1 GPa in four samples compressed in methanol. This suggests that the adsorption of methanol may increase the P-stability range of the orthorhombic Pnma phase. A comparative analysis of the effect of pressure on the methanol adsorption by MFI-zeolites with different chemical composition is provided, which offers potentially useful information on their application as catalysts in the methanol-to-olefins conversion processes and in industrial high-pressure processes
D. Comboni - One of the best experts on this subject based on the ideXlab platform.
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The elastic behavior of zeolitic frameworks: The case of MFI type zeolite under high-pressure methanol intrusion
Catalysis Today, 2020Co-Authors: D. Comboni, F. Pagliaro, Paolo Lotti, G. Diego Gatta, Marco Merlini, Sula Milani, Massimo Migliori, Girolamo Giordano, Enrico Catizzone, Ines E. CollingsAbstract:Abstract The high-pressure behavior of six synthetic zeolites with the MFI topology, characterized by different chemical composition (framework-Si partially replaced by Al or B and counterbalanced by Na or H as extra-framework cations), has been investigated by in-situ powder synchrotron X-ray diffraction using silicone-oil and methanol as hydrostatic pressure-transmitting fluids. For each sample, the compressibility in silicone-oil has been found to be considerably higher than that in methanol. This difference in terms of Bulk Elasticity is due to the adsorption of methanol already at P
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The elastic behavior of zeolitic frameworks : The case of MFI type zeolite under high-pressure methanol intrusion
'Elsevier BV', 2020Co-Authors: D. Comboni, F. Pagliaro, Paolo Lotti, G. Diego Gatta, Marco Merlini, Sula Milani, Massimo Migliori, Girolamo Giordano, Enrico Catizzone, Ines E. CollingsAbstract:The high-pressure behavior of six synthetic zeolites with the MFI topology, characterized by different chemical composition (framework-Si partially replaced by Al or B and counterbalanced by Na or H as extra-framework cations), has been investigated by in-situ powder synchrotron X-ray diffraction using silicone-oil and methanol as hydrostatic pressure-transmitting fluids. For each sample, the compressibility in silicone-oil has been found to be considerably higher than that in methanol. This difference in terms of Bulk Elasticity is due to the adsorption of methanol already at P < 0.1 GPa, with different magnitudes as a function of the sample crystal-chemistry. The high number of experimental pressure points allowed an accurate determination of the monoclinic-to-orthorhombic phase transition (MOPT), detected between 0.3 and 0.7 GPa in the samples compressed in silicone-oil, whereas the orthorhombic Pnma polymorph has been found to be stable already at ∼ 0.1 GPa in four samples compressed in methanol. This suggests that the adsorption of methanol may increase the P-stability range of the orthorhombic Pnma phase. A comparative analysis of the effect of pressure on the methanol adsorption by MFI-zeolites with different chemical composition is provided, which offers potentially useful information on their application as catalysts in the methanol-to-olefins conversion processes and in industrial high-pressure processes
Venkata Subba Rao Jampani - One of the best experts on this subject based on the ideXlab platform.
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self shaping liquid crystal droplets by balancing Bulk Elasticity and interfacial tension
Proceedings of the National Academy of Sciences of the United States of America, 2021Co-Authors: Karthik Peddireddy, Simon Copar, I Musevic, Christian Bahr, Venkata Subba Rao JampaniAbstract:The shape diversity and controlled reconfigurability of closed surfaces and filamentous structures, universally found in cellular colonies and living tissues, are challenging to reproduce. Here, we demonstrate a method for the self-shaping of liquid crystal (LC) droplets into anisotropic and three-dimensional superstructures, such as LC fibers, LC helices, and differently shaped LC vesicles. The method is based on two surfactants: one dissolved in the LC dispersed phase and the other in the aqueous continuous phase. We use thermal stimuli to tune the Bulk LC Elasticity and interfacial energy, thereby transforming an emulsion of polydispersed, spherical nematic droplets into numerous, uniform-diameter fibers with multiple branches and vice versa. Furthermore, when the nematic LC is cooled to the smectic-A LC phase, we produce monodispersed microdroplets with a tunable diameter dictated by the cooling rate. Utilizing this temperature-controlled self-shaping of LCs, we demonstrate life-like smectic LC vesicle structures analogous to the biomembranes in living systems. Our experimental findings are supported by a theoretical model of equilibrium interface shapes. The shape transformation is induced by negative interfacial energy, which promotes a spontaneous increase of the interfacial area at a fixed LC volume. The method was successfully applied to many different LC materials and phases, demonstrating a universal mechanism for shape transformation in complex fluids.
Enrico Catizzone - One of the best experts on this subject based on the ideXlab platform.
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The elastic behavior of zeolitic frameworks: The case of MFI type zeolite under high-pressure methanol intrusion
Catalysis Today, 2020Co-Authors: D. Comboni, F. Pagliaro, Paolo Lotti, G. Diego Gatta, Marco Merlini, Sula Milani, Massimo Migliori, Girolamo Giordano, Enrico Catizzone, Ines E. CollingsAbstract:Abstract The high-pressure behavior of six synthetic zeolites with the MFI topology, characterized by different chemical composition (framework-Si partially replaced by Al or B and counterbalanced by Na or H as extra-framework cations), has been investigated by in-situ powder synchrotron X-ray diffraction using silicone-oil and methanol as hydrostatic pressure-transmitting fluids. For each sample, the compressibility in silicone-oil has been found to be considerably higher than that in methanol. This difference in terms of Bulk Elasticity is due to the adsorption of methanol already at P
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The elastic behavior of zeolitic frameworks : The case of MFI type zeolite under high-pressure methanol intrusion
'Elsevier BV', 2020Co-Authors: D. Comboni, F. Pagliaro, Paolo Lotti, G. Diego Gatta, Marco Merlini, Sula Milani, Massimo Migliori, Girolamo Giordano, Enrico Catizzone, Ines E. CollingsAbstract:The high-pressure behavior of six synthetic zeolites with the MFI topology, characterized by different chemical composition (framework-Si partially replaced by Al or B and counterbalanced by Na or H as extra-framework cations), has been investigated by in-situ powder synchrotron X-ray diffraction using silicone-oil and methanol as hydrostatic pressure-transmitting fluids. For each sample, the compressibility in silicone-oil has been found to be considerably higher than that in methanol. This difference in terms of Bulk Elasticity is due to the adsorption of methanol already at P < 0.1 GPa, with different magnitudes as a function of the sample crystal-chemistry. The high number of experimental pressure points allowed an accurate determination of the monoclinic-to-orthorhombic phase transition (MOPT), detected between 0.3 and 0.7 GPa in the samples compressed in silicone-oil, whereas the orthorhombic Pnma polymorph has been found to be stable already at ∼ 0.1 GPa in four samples compressed in methanol. This suggests that the adsorption of methanol may increase the P-stability range of the orthorhombic Pnma phase. A comparative analysis of the effect of pressure on the methanol adsorption by MFI-zeolites with different chemical composition is provided, which offers potentially useful information on their application as catalysts in the methanol-to-olefins conversion processes and in industrial high-pressure processes
Girolamo Giordano - One of the best experts on this subject based on the ideXlab platform.
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The elastic behavior of zeolitic frameworks: The case of MFI type zeolite under high-pressure methanol intrusion
Catalysis Today, 2020Co-Authors: D. Comboni, F. Pagliaro, Paolo Lotti, G. Diego Gatta, Marco Merlini, Sula Milani, Massimo Migliori, Girolamo Giordano, Enrico Catizzone, Ines E. CollingsAbstract:Abstract The high-pressure behavior of six synthetic zeolites with the MFI topology, characterized by different chemical composition (framework-Si partially replaced by Al or B and counterbalanced by Na or H as extra-framework cations), has been investigated by in-situ powder synchrotron X-ray diffraction using silicone-oil and methanol as hydrostatic pressure-transmitting fluids. For each sample, the compressibility in silicone-oil has been found to be considerably higher than that in methanol. This difference in terms of Bulk Elasticity is due to the adsorption of methanol already at P
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The elastic behavior of zeolitic frameworks : The case of MFI type zeolite under high-pressure methanol intrusion
'Elsevier BV', 2020Co-Authors: D. Comboni, F. Pagliaro, Paolo Lotti, G. Diego Gatta, Marco Merlini, Sula Milani, Massimo Migliori, Girolamo Giordano, Enrico Catizzone, Ines E. CollingsAbstract:The high-pressure behavior of six synthetic zeolites with the MFI topology, characterized by different chemical composition (framework-Si partially replaced by Al or B and counterbalanced by Na or H as extra-framework cations), has been investigated by in-situ powder synchrotron X-ray diffraction using silicone-oil and methanol as hydrostatic pressure-transmitting fluids. For each sample, the compressibility in silicone-oil has been found to be considerably higher than that in methanol. This difference in terms of Bulk Elasticity is due to the adsorption of methanol already at P < 0.1 GPa, with different magnitudes as a function of the sample crystal-chemistry. The high number of experimental pressure points allowed an accurate determination of the monoclinic-to-orthorhombic phase transition (MOPT), detected between 0.3 and 0.7 GPa in the samples compressed in silicone-oil, whereas the orthorhombic Pnma polymorph has been found to be stable already at ∼ 0.1 GPa in four samples compressed in methanol. This suggests that the adsorption of methanol may increase the P-stability range of the orthorhombic Pnma phase. A comparative analysis of the effect of pressure on the methanol adsorption by MFI-zeolites with different chemical composition is provided, which offers potentially useful information on their application as catalysts in the methanol-to-olefins conversion processes and in industrial high-pressure processes
