The Experts below are selected from a list of 93870 Experts worldwide ranked by ideXlab platform
Coronas Joaquín - One of the best experts on this subject based on the ideXlab platform.
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Poly(ether-block-amide) copolymer membrane for CO2/N-2 Separation: the influence of the casting solution concentration on its morphology, thermal properties and Gas Separation performance
2019Co-Authors: Martinez-izquierdo Lidia, Malankowska Magdalena, Sanchez-lainez Javier, Tellez Carlos, Coronas JoaquínAbstract:The present work is focused on the study of the effect that the casting solution concentration has on the morphology and Gas Separation performance of poly(ether-block-amide) copolymer membranes (Pebax (R) MH 1657). With this aim, three different concentrations of Pebax (R) MH 1657 in the casting solution (1, 3 and 5 wt%) were used to prepare dense membranes with a thickness of 40 mu m. The morphology and thermal stability of all membranes were characterized by scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, rotational viscometry and thermogravimetric analyses. An increase in crystallinity was notable when the amount of solvent in the Pebax (R) MH 1657 solution was higher, mainly related to the polymer chains arrangement and the solvent evaporation time. Such characteristic seemed to play a key role in the thermal degradation of the membranes, confirming that the most crystalline materials tend to be thermally more stable than those with lower crystallinity. To study the influence of their morphology and operating temperature on the CO2 Separation, Gas Separation tests were conducted with the Gas mixture CO2/N-2. Results indicated that a compromise must be found between the amount of solvent used to prepare the membranes and the crystallinity, in order to reach the best Gas Separation performance. In this study, the best performance was achieved with the membrane prepared from a 3 wt% casting solution, reaching at 35 degrees C and under a feed pressure of 3 bar, a CO2 permeability of 110 Barrer and a CO2/N-2 selectivity of 36
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Poly(ether-block-amide) copolymer membrane for CO2/N2 Separation: the influence of the casting solution concentration on its morphology, thermal properties and Gas Separation performance
'The Royal Society', 2019Co-Authors: Martinez-izquierdo Lidia, Malankowska Magdalena, Sanchez-lainez Javier, Tellez Carlos, Coronas JoaquínAbstract:The present work is focused on the study of the effect that the casting solution concentration has on the morphology and Gas Separation performance of poly(ether-block-amide) copolymer membranes (Pebax® MH 1657). With this aim, three different concentrations of Pebax® MH 1657 in the casting solution (1, 3 and 5 wt%) were used to prepare dense membranes with a thickness of 40 µm. The morphology and thermal stability of all membranes were characterized by scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, rotational viscometry and thermogravimetric analyses. An increase in crystallinity was notable when the amount of solvent in the Pebax® MH 1657 solution was higher, mainly related to the polymer chains arrangement and the solvent evaporation time. Such characteristic seemed to play a key role in the thermal degradation of the membranes, confirming that the most crystalline materials tend to be thermally more stable than those with lower crystallinity. To study the influence of their morphology and operating temperature on the CO2 Separation, Gas Separation tests were conducted with the Gas mixture CO2/N2. Results indicated that a compromise must be found between the amount of solvent used to prepare the membranes and the crystallinity, in order to reach the best Gas Separation performance. In this study, the best performance was achieved with the membrane prepared from a 3 wt% casting solution, reaching at 35°C and under a feed pressure of 3 bar, a CO2 permeability of 110 Barrer and a CO2/N2 selectivity of 36.This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 760944 (MEMBER project). Also, financial support from the Spanish Ministry of Science, Innovation and Universities and FEDER (MAT2016-77290-R), the Aragón Government (T43-17R) and the ESF is gratefully acknowledged.Peer reviewe
Weigang Lin - One of the best experts on this subject based on the ideXlab platform.
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process simulation of mineral carbonation of phosphogypsum with ammonia under increased co2 pressure
Journal of CO 2 Utilization, 2017Co-Authors: Weijun Bao, Hongtao Zhao, Huiquan Li, Songgeng Li, Weigang LinAbstract:Abstract The mineral carbonation of phosphogypsum offers many advantages in sequestering CO2, solving the pollution problem of phosphogypsum stacking, and manufacturing high value-added chemical products with low energy consumption and cost. Using the Aspen Plus process simulation software, this work simulates a novel process for the mineral carbonation of phosphogypsum with ammonia under increased CO2 pressure. This process is divided into five sections, namely, pre-carbonation, enhanced carbonation, flash Separation, Gas phase absorption, and (NH4)2SO4 fertilizer production. With its large-scale application, this new process allows the sensitivity analysis of many operation conditions, identifies the optimal conditions for reducing the ammonia and energy consumption of (NH4)2SO4 fertilizer production, and achieves a high carbonation conversion with a fast reaction rate. The optimal conditions (6 bar enhanced carbonation pressure, 1 bar flash pressure, 38 °C ammonia absorption solution temperature, 1.05 ammonia excess ratio, 1.024 CO2 excess ratio, and 0.94 mass ratio of water to gypsum) yield the highest carbonation conversion, ammonia utilization ratio, and enhanced carbonation temperature of 99.9%, 95.2%, and 138.5 °C, respectively, all of which can help achieve a fast carbonation reaction rate.
Omid Bakhtiari - One of the best experts on this subject based on the ideXlab platform.
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synthesis and Gas transport performance of mil 101 matrimid mixed matrix membranes
Journal of Industrial and Engineering Chemistry, 2015Co-Authors: Masoomeh Naseri, Seyed Foad Mousavi, Toraj Mohammadi, Omid BakhtiariAbstract:Abstract Mixed matrix membranes (MMMs) are composites of highly selective fillers within a polymeric matrix, resulting in higher selectivity and/or flux in Gas Separation applications. In this work, micron sized MIL-101 crystals with potential of Gas Separation by adsorption were synthesized and used as filler for the preparation of MMMs for Gas Separation. Gas adsorption measurements were performed for CO 2 , CH 4 and N 2 using MIL-101 crystals and the results showed significant adsorption of CO 2 compared with the two other Gases at different pressures. SEM images and XRD analysis were used to characterize the filler particles and the synthesized membranes. MIL-101/Matrimid MMMs were synthesized with up to 30 wt.% loading of filler particles. SEM images showed good dispersion of the particles in the polymeric matrix and also good adhesion between the filler particles and the polymer. Permeability measurements were performed for pure Gases of CO 2 , CH 4 and N 2 and the results showed improved CO 2 /CH 4 and CO 2 /N 2 ideal selectivities for the MMMs compared with those for the neat Matrimid membrane. For the MMMs with 10 wt.% loading, permeability of CO 2 was found as 6.95 Barrer and ideal selectivities for CO 2 /CH 4 and CO 2 /N 2 were as 55.77 and 52.92, respectively.
Martinez-izquierdo Lidia - One of the best experts on this subject based on the ideXlab platform.
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Poly(ether-block-amide) copolymer membrane for CO2/N-2 Separation: the influence of the casting solution concentration on its morphology, thermal properties and Gas Separation performance
2019Co-Authors: Martinez-izquierdo Lidia, Malankowska Magdalena, Sanchez-lainez Javier, Tellez Carlos, Coronas JoaquínAbstract:The present work is focused on the study of the effect that the casting solution concentration has on the morphology and Gas Separation performance of poly(ether-block-amide) copolymer membranes (Pebax (R) MH 1657). With this aim, three different concentrations of Pebax (R) MH 1657 in the casting solution (1, 3 and 5 wt%) were used to prepare dense membranes with a thickness of 40 mu m. The morphology and thermal stability of all membranes were characterized by scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, rotational viscometry and thermogravimetric analyses. An increase in crystallinity was notable when the amount of solvent in the Pebax (R) MH 1657 solution was higher, mainly related to the polymer chains arrangement and the solvent evaporation time. Such characteristic seemed to play a key role in the thermal degradation of the membranes, confirming that the most crystalline materials tend to be thermally more stable than those with lower crystallinity. To study the influence of their morphology and operating temperature on the CO2 Separation, Gas Separation tests were conducted with the Gas mixture CO2/N-2. Results indicated that a compromise must be found between the amount of solvent used to prepare the membranes and the crystallinity, in order to reach the best Gas Separation performance. In this study, the best performance was achieved with the membrane prepared from a 3 wt% casting solution, reaching at 35 degrees C and under a feed pressure of 3 bar, a CO2 permeability of 110 Barrer and a CO2/N-2 selectivity of 36
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Poly(ether-block-amide) copolymer membrane for CO2/N2 Separation: the influence of the casting solution concentration on its morphology, thermal properties and Gas Separation performance
'The Royal Society', 2019Co-Authors: Martinez-izquierdo Lidia, Malankowska Magdalena, Sanchez-lainez Javier, Tellez Carlos, Coronas JoaquínAbstract:The present work is focused on the study of the effect that the casting solution concentration has on the morphology and Gas Separation performance of poly(ether-block-amide) copolymer membranes (Pebax® MH 1657). With this aim, three different concentrations of Pebax® MH 1657 in the casting solution (1, 3 and 5 wt%) were used to prepare dense membranes with a thickness of 40 µm. The morphology and thermal stability of all membranes were characterized by scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, rotational viscometry and thermogravimetric analyses. An increase in crystallinity was notable when the amount of solvent in the Pebax® MH 1657 solution was higher, mainly related to the polymer chains arrangement and the solvent evaporation time. Such characteristic seemed to play a key role in the thermal degradation of the membranes, confirming that the most crystalline materials tend to be thermally more stable than those with lower crystallinity. To study the influence of their morphology and operating temperature on the CO2 Separation, Gas Separation tests were conducted with the Gas mixture CO2/N2. Results indicated that a compromise must be found between the amount of solvent used to prepare the membranes and the crystallinity, in order to reach the best Gas Separation performance. In this study, the best performance was achieved with the membrane prepared from a 3 wt% casting solution, reaching at 35°C and under a feed pressure of 3 bar, a CO2 permeability of 110 Barrer and a CO2/N2 selectivity of 36.This project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement no. 760944 (MEMBER project). Also, financial support from the Spanish Ministry of Science, Innovation and Universities and FEDER (MAT2016-77290-R), the Aragón Government (T43-17R) and the ESF is gratefully acknowledged.Peer reviewe
Weijun Bao - One of the best experts on this subject based on the ideXlab platform.
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process simulation of mineral carbonation of phosphogypsum with ammonia under increased co2 pressure
Journal of CO 2 Utilization, 2017Co-Authors: Weijun Bao, Hongtao Zhao, Huiquan Li, Songgeng Li, Weigang LinAbstract:Abstract The mineral carbonation of phosphogypsum offers many advantages in sequestering CO2, solving the pollution problem of phosphogypsum stacking, and manufacturing high value-added chemical products with low energy consumption and cost. Using the Aspen Plus process simulation software, this work simulates a novel process for the mineral carbonation of phosphogypsum with ammonia under increased CO2 pressure. This process is divided into five sections, namely, pre-carbonation, enhanced carbonation, flash Separation, Gas phase absorption, and (NH4)2SO4 fertilizer production. With its large-scale application, this new process allows the sensitivity analysis of many operation conditions, identifies the optimal conditions for reducing the ammonia and energy consumption of (NH4)2SO4 fertilizer production, and achieves a high carbonation conversion with a fast reaction rate. The optimal conditions (6 bar enhanced carbonation pressure, 1 bar flash pressure, 38 °C ammonia absorption solution temperature, 1.05 ammonia excess ratio, 1.024 CO2 excess ratio, and 0.94 mass ratio of water to gypsum) yield the highest carbonation conversion, ammonia utilization ratio, and enhanced carbonation temperature of 99.9%, 95.2%, and 138.5 °C, respectively, all of which can help achieve a fast carbonation reaction rate.
