Nanoporous carbon materials were synthesized from asphaltenes using a thermo-chemical treatment under an inert atmosphere and in-situ KOH activation.N-doping was also employed in certain samples to reveal the impact o...Nanoporous carbon materials were synthesized from asphaltenes using a thermo-chemical treatment under an inert atmosphere and in-situ KOH activation.N-doping was also employed in certain samples to reveal the impact of nitrogen on the properties of materials.The synthesized materials were fully characterized to disclose their textural properties,structural parameters,surface functional groups,elemental compositions,and morphologies.Textural property analysis revealed a remarkable increase in surface areas after alkaline treatment(~1500-2000 m^(2)/g),which was mainly ascribed to the formation of micro-and mesopores.The measurements of structural parameters endorse and complement the findings on textural properties.The asphaltene-derived porous carbons have been employed in energy storage and carbon capture applications.The materials exhibit specific capacitances ranging from 130 to 180 F/g at 0.2 A/g in a 3 M KOH.These results suggest that nitrogen doping significantly enhances the pseudocapacitive behavior of the electroactive materials by promoting Fara-daic redox reactions and improving ion diffusion and adsorption rates.Asphaltene-derived porous carbons also exhibit notable CO_(2)adsorption capacities of 3-4 mmol/g at 25◦C and 1 bar.Also,breakthrough experiments confirm that the N-doped material exhibits remarkable stability,reusability,and increased surface basicity,achieving an impressive CO_(2)uptake of 0.446 mmol/g.These results highlight the potential of asphaltene-based porous carbons as efficient materials for carbon capture and energy storage applications.展开更多
By means of molecular scale management,the technology of separating normal paraffins from naphtha through adsorption using 5A molecular sieves was studied with the purpose of optimizing the utilization of naphtha.The ...By means of molecular scale management,the technology of separating normal paraffins from naphtha through adsorption using 5A molecular sieves was studied with the purpose of optimizing the utilization of naphtha.The raw materials used in steam cracking and catalytic reforming processes could be allocated properly.During the adsorption process,the separation efficiency of the normal paraffins was above 99.9%with the purity of normal paraffins in the desorption oil exceeding 98.2%.With the use of the desorption oil as the feedstock of steam cracking,the ethylene yield increased from 29.7%-35.0%to 41.4%-49.2%compared to that of the naphtha in the existing plant under similar operation conditions.The potential aromatic content of the raffinate oil rose from 30.6%to 43.5%compared to that in naphtha.The research octane number of the raffinate oil reached more than 85 with an increase of 20 units compared to that of naphtha,so the raffinate oil is more suitable for use as a blending component for high-octane clean gasoline.展开更多
Kuwait is one of the major oil-producing countries, with an estimated oil production of around three million barrels/day. Increased oil production has resulted in the production of large amounts of produced water, whi...Kuwait is one of the major oil-producing countries, with an estimated oil production of around three million barrels/day. Increased oil production has resulted in the production of large amounts of produced water, which is a major problem for Kuwait Oil Company. Kuwait Oil Company generates large amounts of produced water daily and thus deserves special attention. A study of the characteristics of the produced water will determine how it can be treated and later used for irrigation or disposed without harming the environment. In this paper, samples of produced water from different oilfields in Kuwait were collected, and physiochemical analyses were carried out. The salt content, TDS and other physical characteristics of the Kuwait produced water samples were compared with those of other produced water samples from different oil-producing countries.展开更多
基金financial support provided by Kuwait Institute for Scientific Research(KISR).
文摘Nanoporous carbon materials were synthesized from asphaltenes using a thermo-chemical treatment under an inert atmosphere and in-situ KOH activation.N-doping was also employed in certain samples to reveal the impact of nitrogen on the properties of materials.The synthesized materials were fully characterized to disclose their textural properties,structural parameters,surface functional groups,elemental compositions,and morphologies.Textural property analysis revealed a remarkable increase in surface areas after alkaline treatment(~1500-2000 m^(2)/g),which was mainly ascribed to the formation of micro-and mesopores.The measurements of structural parameters endorse and complement the findings on textural properties.The asphaltene-derived porous carbons have been employed in energy storage and carbon capture applications.The materials exhibit specific capacitances ranging from 130 to 180 F/g at 0.2 A/g in a 3 M KOH.These results suggest that nitrogen doping significantly enhances the pseudocapacitive behavior of the electroactive materials by promoting Fara-daic redox reactions and improving ion diffusion and adsorption rates.Asphaltene-derived porous carbons also exhibit notable CO_(2)adsorption capacities of 3-4 mmol/g at 25◦C and 1 bar.Also,breakthrough experiments confirm that the N-doped material exhibits remarkable stability,reusability,and increased surface basicity,achieving an impressive CO_(2)uptake of 0.446 mmol/g.These results highlight the potential of asphaltene-based porous carbons as efficient materials for carbon capture and energy storage applications.
文摘By means of molecular scale management,the technology of separating normal paraffins from naphtha through adsorption using 5A molecular sieves was studied with the purpose of optimizing the utilization of naphtha.The raw materials used in steam cracking and catalytic reforming processes could be allocated properly.During the adsorption process,the separation efficiency of the normal paraffins was above 99.9%with the purity of normal paraffins in the desorption oil exceeding 98.2%.With the use of the desorption oil as the feedstock of steam cracking,the ethylene yield increased from 29.7%-35.0%to 41.4%-49.2%compared to that of the naphtha in the existing plant under similar operation conditions.The potential aromatic content of the raffinate oil rose from 30.6%to 43.5%compared to that in naphtha.The research octane number of the raffinate oil reached more than 85 with an increase of 20 units compared to that of naphtha,so the raffinate oil is more suitable for use as a blending component for high-octane clean gasoline.
文摘Kuwait is one of the major oil-producing countries, with an estimated oil production of around three million barrels/day. Increased oil production has resulted in the production of large amounts of produced water, which is a major problem for Kuwait Oil Company. Kuwait Oil Company generates large amounts of produced water daily and thus deserves special attention. A study of the characteristics of the produced water will determine how it can be treated and later used for irrigation or disposed without harming the environment. In this paper, samples of produced water from different oilfields in Kuwait were collected, and physiochemical analyses were carried out. The salt content, TDS and other physical characteristics of the Kuwait produced water samples were compared with those of other produced water samples from different oil-producing countries.
