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Papers by Nadeen Al-janabi
Colloids and Surfaces A: Physicochemical and Engineering Aspects, Oct 1, 2019
The influence of olive and palm oils on the gel phase formed by mixed saturated and unsaturated m... more The influence of olive and palm oils on the gel phase formed by mixed saturated and unsaturated monoglycerides in the absence and presence of water has been examined by X-ray diffraction. Unexpectedly, whilst olive oil had little interaction with the gel phase, some palm oil was incorporated into the gel phase increasing its stability with much lower swelling in water. We have also made water vapour pressure measurements to investigate the interaction forces between lipid bilayers. Palm oil increased vapour pressure significantly compared to G50 (mixed saturated and unsaturated monoglycerides), more than what was observed for olive oil. It is generally accepted that the interaction forces are dominated by hydration, one description employs an exponentially decaying force transmitted through water [water-structure], while the second invokes lipid/water H-binding. Both can describe the experimental data, but because the water-structure model employs non-physical parameters the second mechanism is preferred. The findings provide novel insights and implications on the functionality and stability of glycerolipids in manufacturing next generation effective medicines, foods and cosmetics.
Aiche Journal, Mar 8, 2018
This study shows that for a reliable evaluation of porous adsorbents for carbon capture based on ... more This study shows that for a reliable evaluation of porous adsorbents for carbon capture based on the fixed bed adsorption analysis, one must consider the effect of velocity variation due to adsorption to make a fair judgment on predicting the performance of materials under flow conditions. A combined experimental and numerical study of CO 2 /N 2 adsorption in fixed beds using three forms of adsorbents of amorphous powder (bulk activated carbon, AC), crystalline powder (bulk CuBTC metal-organic framework, MOF) and crystalline pellets (pelleted CuBTC) was carried out to show the effect of velocity variation on CO 2 breakthrough curves. Significant deviations are observed in the estimated amount adsorbed calculated from fixed bed experiments when models used for interpretation the measured data consider constant gas velocity because the stoichiometric time is underestimated. We show that the difference in breakthrough times estimated in models that consider constant and variable gas velocity grows exponentially with the feed gas concentration.
Microporous and Mesoporous Materials, Apr 1, 2018
Chemical Engineering Journal, Dec 1, 2015
Cu-BTC Metal-organic framework (HKUST-1) was evaluated as the model material for CO2 capture from... more Cu-BTC Metal-organic framework (HKUST-1) was evaluated as the model material for CO2 capture from flue gas streams. This paper presents an optimised hydrothermal synthesis of HKUST-1 and an analysis of water stability of HKUST-1. Substantial improvements of the hydrothermal synthesis process of HKUST-1 are shown to increase the quantitative yield up to 89.4% at 100ºC. Single-component adsorption experiments were carried out under conditions relevant for flue gases adsorption (45-60ºC, 0-1 barG) to evaluate the performance of HKUST-1 in terms of adsorption capacity, showing that the amount adsorbed of water can reach up to 21.7 mmol g-1 , about one order of magnitude higher than CO2 (1.75 mmol g −1) and almost two orders of magnitude higher than N2 (0.17 mmol g −1). The hydration process of HKUST-1 framework was investigated using dynamic vapour adsorption under the flue gas emitting conditions. HKUST-1 is sensitive to humid streams and dynamic deformation of its porous structure takes place at 40-50ºC and various relative humidity values, leading to the irreversible decomposition of HKUST-1 framework and the consequent deterioration in its adsorption capacity. Under humid conditions, water displaces the organic linkers from the copper centres causing the collapse of HKUST-1 framework. These results provide fundamental knowledge to enable future material design for the modification of the hydrophilic nature of copper sites in HKUST-1 to improve its moisture stability.
Journal of Catalysis, 2016
Chemical Engineering Journal, Feb 1, 2018
Journal of Physical Chemistry Letters, Apr 7, 2016
Journal of Catalysis, Aug 1, 2016
Chemcatchem, Aug 13, 2018
This article may be used for non-commercial purposes in accordance with Wiley Terms and Condition... more This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Industrial & Engineering Chemistry Research, Mar 23, 2016
Practical applications require hydrothermally stable metal−organic frameworks (MOFs). Achieving s... more Practical applications require hydrothermally stable metal−organic frameworks (MOFs). Achieving stable MOFs in the presence of water or humidity is challenging, especially for MOFs with open metals sites (OMSs) due to the high affinity of water molecules toward OMSs. A straightforward solution to tackling this problem is to protect OMSs in the porous structure of MOFs. A facile post-synthetic modification (PSM) method for the synthesis of molecular glycine-doped CuBTC MOF (BTC = benzene-1,3,5-tricarboxylic acid) was developed in this study. Developed materials, i.e., Gly-CuBTC MOFs, were characterized using various characterization techniques and evaluated using single-component gas (CO 2 and N 2) adsorption and dynamic water vapor adsorption experiments. The economical dopant of molecular glycine with amine and a carboxyl group was found to be able to saturate OMSs in the parent CuBTC MOF, leading to improved hydrothermal stability and CO 2 :N 2 selectivity. It was also found that the adsorption capacity, CO 2 :N 2 selectivity, and hydrothermal stability of Gly-CuBTC MOFs depend on the percentage of saturation of OMSs in the parent MOF.
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2019
The influence of olive and palm oils on the gel phase formed by mixed saturated and unsaturated m... more The influence of olive and palm oils on the gel phase formed by mixed saturated and unsaturated monoglycerides in the absence and presence of water has been examined by X-ray diffraction. Unexpectedly, whilst olive oil had little interaction with the gel phase, some palm oil was incorporated into the gel phase increasing its stability with much lower swelling in water. We have also made water vapour pressure measurements to investigate the interaction forces between lipid bilayers. Palm oil increased vapour pressure significantly compared to G50 (mixed saturated and unsaturated monoglycerides), more than what was observed for olive oil. It is generally accepted that the interaction forces are dominated by hydration, one description employs an exponentially decaying force transmitted through water [water-structure], while the second invokes lipid/water H-binding. Both can describe the experimental data, but because the water-structure model employs non-physical parameters the second mechanism is preferred. The findings provide novel insights and implications on the functionality and stability of glycerolipids in manufacturing next generation effective medicines, foods and cosmetics.
Chemical Engineering Journal, 2018
Nature Catalysis, 2019
Sustaining metal-organic frameworks for water-gas shift catalysis by non-thermal plasma. Nature C... more Sustaining metal-organic frameworks for water-gas shift catalysis by non-thermal plasma. Nature Catalysis.
Microporous and Mesoporous Materials, 2018
ChemCatChem, 2018
This article may be used for non-commercial purposes in accordance with Wiley Terms and Condition... more This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Industrial & Engineering Chemistry Research, 2016
Practical applications require hydrothermally stable metal−organic frameworks (MOFs). Achieving s... more Practical applications require hydrothermally stable metal−organic frameworks (MOFs). Achieving stable MOFs in the presence of water or humidity is challenging, especially for MOFs with open metals sites (OMSs) due to the high affinity of water molecules toward OMSs. A straightforward solution to tackling this problem is to protect OMSs in the porous structure of MOFs. A facile post-synthetic modification (PSM) method for the synthesis of molecular glycine-doped CuBTC MOF (BTC = benzene-1,3,5-tricarboxylic acid) was developed in this study. Developed materials, i.e., Gly-CuBTC MOFs, were characterized using various characterization techniques and evaluated using single-component gas (CO 2 and N 2) adsorption and dynamic water vapor adsorption experiments. The economical dopant of molecular glycine with amine and a carboxyl group was found to be able to saturate OMSs in the parent CuBTC MOF, leading to improved hydrothermal stability and CO 2 :N 2 selectivity. It was also found that the adsorption capacity, CO 2 :N 2 selectivity, and hydrothermal stability of Gly-CuBTC MOFs depend on the percentage of saturation of OMSs in the parent MOF.
Colloids and Surfaces A: Physicochemical and Engineering Aspects, Oct 1, 2019
The influence of olive and palm oils on the gel phase formed by mixed saturated and unsaturated m... more The influence of olive and palm oils on the gel phase formed by mixed saturated and unsaturated monoglycerides in the absence and presence of water has been examined by X-ray diffraction. Unexpectedly, whilst olive oil had little interaction with the gel phase, some palm oil was incorporated into the gel phase increasing its stability with much lower swelling in water. We have also made water vapour pressure measurements to investigate the interaction forces between lipid bilayers. Palm oil increased vapour pressure significantly compared to G50 (mixed saturated and unsaturated monoglycerides), more than what was observed for olive oil. It is generally accepted that the interaction forces are dominated by hydration, one description employs an exponentially decaying force transmitted through water [water-structure], while the second invokes lipid/water H-binding. Both can describe the experimental data, but because the water-structure model employs non-physical parameters the second mechanism is preferred. The findings provide novel insights and implications on the functionality and stability of glycerolipids in manufacturing next generation effective medicines, foods and cosmetics.
Aiche Journal, Mar 8, 2018
This study shows that for a reliable evaluation of porous adsorbents for carbon capture based on ... more This study shows that for a reliable evaluation of porous adsorbents for carbon capture based on the fixed bed adsorption analysis, one must consider the effect of velocity variation due to adsorption to make a fair judgment on predicting the performance of materials under flow conditions. A combined experimental and numerical study of CO 2 /N 2 adsorption in fixed beds using three forms of adsorbents of amorphous powder (bulk activated carbon, AC), crystalline powder (bulk CuBTC metal-organic framework, MOF) and crystalline pellets (pelleted CuBTC) was carried out to show the effect of velocity variation on CO 2 breakthrough curves. Significant deviations are observed in the estimated amount adsorbed calculated from fixed bed experiments when models used for interpretation the measured data consider constant gas velocity because the stoichiometric time is underestimated. We show that the difference in breakthrough times estimated in models that consider constant and variable gas velocity grows exponentially with the feed gas concentration.
Microporous and Mesoporous Materials, Apr 1, 2018
Chemical Engineering Journal, Dec 1, 2015
Cu-BTC Metal-organic framework (HKUST-1) was evaluated as the model material for CO2 capture from... more Cu-BTC Metal-organic framework (HKUST-1) was evaluated as the model material for CO2 capture from flue gas streams. This paper presents an optimised hydrothermal synthesis of HKUST-1 and an analysis of water stability of HKUST-1. Substantial improvements of the hydrothermal synthesis process of HKUST-1 are shown to increase the quantitative yield up to 89.4% at 100ºC. Single-component adsorption experiments were carried out under conditions relevant for flue gases adsorption (45-60ºC, 0-1 barG) to evaluate the performance of HKUST-1 in terms of adsorption capacity, showing that the amount adsorbed of water can reach up to 21.7 mmol g-1 , about one order of magnitude higher than CO2 (1.75 mmol g −1) and almost two orders of magnitude higher than N2 (0.17 mmol g −1). The hydration process of HKUST-1 framework was investigated using dynamic vapour adsorption under the flue gas emitting conditions. HKUST-1 is sensitive to humid streams and dynamic deformation of its porous structure takes place at 40-50ºC and various relative humidity values, leading to the irreversible decomposition of HKUST-1 framework and the consequent deterioration in its adsorption capacity. Under humid conditions, water displaces the organic linkers from the copper centres causing the collapse of HKUST-1 framework. These results provide fundamental knowledge to enable future material design for the modification of the hydrophilic nature of copper sites in HKUST-1 to improve its moisture stability.
Journal of Catalysis, 2016
Chemical Engineering Journal, Feb 1, 2018
Journal of Physical Chemistry Letters, Apr 7, 2016
Journal of Catalysis, Aug 1, 2016
Chemcatchem, Aug 13, 2018
This article may be used for non-commercial purposes in accordance with Wiley Terms and Condition... more This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Industrial & Engineering Chemistry Research, Mar 23, 2016
Practical applications require hydrothermally stable metal−organic frameworks (MOFs). Achieving s... more Practical applications require hydrothermally stable metal−organic frameworks (MOFs). Achieving stable MOFs in the presence of water or humidity is challenging, especially for MOFs with open metals sites (OMSs) due to the high affinity of water molecules toward OMSs. A straightforward solution to tackling this problem is to protect OMSs in the porous structure of MOFs. A facile post-synthetic modification (PSM) method for the synthesis of molecular glycine-doped CuBTC MOF (BTC = benzene-1,3,5-tricarboxylic acid) was developed in this study. Developed materials, i.e., Gly-CuBTC MOFs, were characterized using various characterization techniques and evaluated using single-component gas (CO 2 and N 2) adsorption and dynamic water vapor adsorption experiments. The economical dopant of molecular glycine with amine and a carboxyl group was found to be able to saturate OMSs in the parent CuBTC MOF, leading to improved hydrothermal stability and CO 2 :N 2 selectivity. It was also found that the adsorption capacity, CO 2 :N 2 selectivity, and hydrothermal stability of Gly-CuBTC MOFs depend on the percentage of saturation of OMSs in the parent MOF.
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2019
The influence of olive and palm oils on the gel phase formed by mixed saturated and unsaturated m... more The influence of olive and palm oils on the gel phase formed by mixed saturated and unsaturated monoglycerides in the absence and presence of water has been examined by X-ray diffraction. Unexpectedly, whilst olive oil had little interaction with the gel phase, some palm oil was incorporated into the gel phase increasing its stability with much lower swelling in water. We have also made water vapour pressure measurements to investigate the interaction forces between lipid bilayers. Palm oil increased vapour pressure significantly compared to G50 (mixed saturated and unsaturated monoglycerides), more than what was observed for olive oil. It is generally accepted that the interaction forces are dominated by hydration, one description employs an exponentially decaying force transmitted through water [water-structure], while the second invokes lipid/water H-binding. Both can describe the experimental data, but because the water-structure model employs non-physical parameters the second mechanism is preferred. The findings provide novel insights and implications on the functionality and stability of glycerolipids in manufacturing next generation effective medicines, foods and cosmetics.
Chemical Engineering Journal, 2018
Nature Catalysis, 2019
Sustaining metal-organic frameworks for water-gas shift catalysis by non-thermal plasma. Nature C... more Sustaining metal-organic frameworks for water-gas shift catalysis by non-thermal plasma. Nature Catalysis.
Microporous and Mesoporous Materials, 2018
ChemCatChem, 2018
This article may be used for non-commercial purposes in accordance with Wiley Terms and Condition... more This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Industrial & Engineering Chemistry Research, 2016
Practical applications require hydrothermally stable metal−organic frameworks (MOFs). Achieving s... more Practical applications require hydrothermally stable metal−organic frameworks (MOFs). Achieving stable MOFs in the presence of water or humidity is challenging, especially for MOFs with open metals sites (OMSs) due to the high affinity of water molecules toward OMSs. A straightforward solution to tackling this problem is to protect OMSs in the porous structure of MOFs. A facile post-synthetic modification (PSM) method for the synthesis of molecular glycine-doped CuBTC MOF (BTC = benzene-1,3,5-tricarboxylic acid) was developed in this study. Developed materials, i.e., Gly-CuBTC MOFs, were characterized using various characterization techniques and evaluated using single-component gas (CO 2 and N 2) adsorption and dynamic water vapor adsorption experiments. The economical dopant of molecular glycine with amine and a carboxyl group was found to be able to saturate OMSs in the parent CuBTC MOF, leading to improved hydrothermal stability and CO 2 :N 2 selectivity. It was also found that the adsorption capacity, CO 2 :N 2 selectivity, and hydrothermal stability of Gly-CuBTC MOFs depend on the percentage of saturation of OMSs in the parent MOF.