The Experts below are selected from a list of 37800 Experts worldwide ranked by ideXlab platform
Xiaochun Chen - One of the best experts on this subject based on the ideXlab platform.
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Extractive denitrogenation of Fuel Oils using ionic liquids: a review
RSC Advances, 2016Co-Authors: Rashid Abro, Abdul Waheed Bhutto, Shurong Gao, Masroor Abro, Zeenat M. Ali, Asif Shah, Xiaochun ChenAbstract:Elimination of nitrogen (N) compounds contained in Fuel Oils is one of the essential processes for petroleum refinery due of their hindering consequences on the hydrodesulfurization (HDS) process. Traditional hydrodenitrogenation (HDN) techniques have some barriers to produce lower-N or N-free Fuel Oils, e.g., HDN is less effective to remove some cyclic N-compounds; HDN is expensive because of operating conditions such as high pressure and high temperature, and also requires the presence of an expensive catalyst and hydrogen. Application of ionic liquids (ILs) for the purpose of Fuel oil extractive denitrogenation (EDN) has been an important part of research in recent years, and it has shown huge potential as an effective substitute or supplemental technique to HDN. In the present review, we studied research results of EDN using ILs and have discussed widely the diversified factors influencing denitrogenation. This review concludes that EDN employing ILs has a promising future owing to the ideal physical and chemical characteristics of ILs; though for such a new technology there are some challenges, for which a discussion is also given. This review contributes proposals for possible commercial application of ILs in EDN.
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Oxidative desulfurization of Fuel Oils using ionic liquids: A review
Journal of The Taiwan Institute of Chemical Engineers, 2016Co-Authors: Abdul Waheed Bhutto, Rashid Abro, Shurong Gao, Tauqeer Abbas, Xiaochun ChenAbstract:Due to sterically-hindered adsorption of some thiophenic sulfur compounds (S-compounds) such as thiophene, dibenzothiophene and their derivatives on catalyst surface, hydrodesulfurization (HDS) is not effective to remove such thiophenic S-compounds in Fuel Oils. To produce clean Fuel Oils with lower S-content (e.g., S
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oxidative desulfurization of Fuel Oils using ionic liquids a review
Journal of The Taiwan Institute of Chemical Engineers, 2016Co-Authors: Abdul Waheed Bhutto, Rashid Abro, Shurong Gao, Tauqeer Abbas, Xiaochun ChenAbstract:Due to sterically-hindered adsorption of some thiophenic sulfur compounds (S-compounds) such as thiophene, dibenzothiophene and their derivatives on catalyst surface, hydrodesulfurization (HDS) is not effective to remove such thiophenic S-compounds in Fuel Oils. To produce clean Fuel Oils with lower S-content (e.g., S < 10 ppm), severe conditions such as high temperature, high pressure, active catalyst and complex process are required in HDS, which, however, results into higher cost, more olefin loss, and lower oil yield. Although some alternative methods such as extraction (EDS), oxidation (ODS), adsorption (ADS) and bio desulfurization (BDS) have been studied, no one is widely used in commercial scale due to some respective problems. In the past few decades, ODS of Fuel Oils using ionic liquids (ILs) has drawn increasing attentions, and many works have been published. In this new method, instead of traditional organic solvents, ILs are employed as extractants or/and catalysts, where S-compounds are extracted into ILs phase and oxidized to their sulfone products, and these more polar sulfones are removed easily. ILs have some advantages such as non-volatility, wide liquid range, high thermal and chemical stability, regenerability and reusability, which make this new ILs-based method avoid the problems such as solvent loss/contamination and difficult separation and regeneration in tradition ODS with organic solvents. It is worth noting that the numerous species and the designability of ILs produce a very huge candidate pool for selecting one suitable IL for oxidative desulfurization. Recently, many scientific findings about ODS using ILs have shown its good future. Here, we give a review for these interesting results to illustrate the novelty, problem and perspective of such a new method.
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Desulphurization of Fuel Oils Using Ionic Liquids
Petrochemical Catalyst Materials Processes and Emerging Technologies, 2016Co-Authors: Abdul Waheed Bhutto, Rashid Abro, Tauqeer Abbas, Xiaochun ChenAbstract:Hydrodesulphurization (HDS) is a standard process for removing sulphur compounds in Fuel Oils in industry. HDS is effective to remove simple aliphatic sulphur compounds while less effective to remove thiophenes, dibenzothiophenes, and their derivatives because of sterically hindered adsorption on catalyst surface. Application of ionic liquids (ILs, a new class of compounds) substituting for traditional volatile organic solvents in extractive desulphurization (EDS) or oxidative desulphurization (ODS), have been being studied intensively in the latest decades, and many very promising results have been obtained, showing a good prospect as complement method to HDS. In this chapter, these fresh research results of EDS and ODS using ILs are summarized along with comprehensive discussions on diversified desulphurization factors along with some potential problems. It can be inferred that ILs are a class of potential ideal solvents to realize clean Fuel oil in future although some problems come too.
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a review of extractive desulfurization of Fuel Oils using ionic liquids
RSC Advances, 2014Co-Authors: Rashid Abro, Ahmed A Abdeltawab, Salem S Aldeyab, Guangren Yu, Abdul Basit Qazi, Xiaochun ChenAbstract:Hydrodesulfurization (HDS), a widely employed method in industries for the desulfurization of Fuel Oils, such as gasoline and diesel Fuel is faced with the challenge of producing lower-sulfur or sulfur-free Fuel Oils, which are required by more and more countries. However, HDS is not very effective for the removal of thiophenic sulfur compounds due to sterically-hindered adsorption on the catalyst surface, unless operated under harsh conditions, such as high temperature, high pressure, and requirement of a noble catalyst and hydrogen. Extractive desulfurization (EDS) of Fuel Oils using ionic liquids (ILs) has been intensively studied in recent decades and has a good future as an alternative or complementary method to HDS. In this review, we reviewed the research results of EDS using ILs and provided comprehensive discussions on diverse factors, which influence desulfurization, such as the IL species, IL–oil mass ratio, initial sulfur content, temperature, time, mutual solubility, multiple extractions and regeneration. Potential problems or shortcomings were also stated. Some other desulfurization methods currently under study, such as extraction, oxidation, adsorption and biodesulfurization were also briefly outlined. It can be inferred that ILs remain a class of ideal solvents to realize clean Fuel oil in the near future because of their desirable physiochemical properties, which are lacking in molecular organic solvents, while there are possible challenges, such as relatively high viscosity and low efficiency.
Radek Cerný - One of the best experts on this subject based on the ideXlab platform.
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RGB histograms as a reliable tool for the evaluation of Fuel Oils stability
Fuel, 2018Co-Authors: Aleš Vráblík, José M. Hidalgo-herrador, Radek CernýAbstract:The stability of Fuel Oils could be affected by sediments and sludge, which may block filters and lines in the feeding pipes and engines. The development of a reliable method for the Fuel oil stability assessment is still a hot topic. The presented method is based on the Spot test according to ASTM D 4740 but the spot is visualized, modified by software and converted into RGB histograms. The histograms provide the parameters necessary for the calculation of the V-value. This parameter was effectively correlated with the frequently used Total Sediment Accelerated and with other properties for the evaluation of the Fuel oil quality and stability.
Aleš Vráblík - One of the best experts on this subject based on the ideXlab platform.
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RGB histograms as a reliable tool for the evaluation of Fuel Oils stability
Fuel, 2018Co-Authors: Aleš Vráblík, José M. Hidalgo-herrador, Radek CernýAbstract:The stability of Fuel Oils could be affected by sediments and sludge, which may block filters and lines in the feeding pipes and engines. The development of a reliable method for the Fuel oil stability assessment is still a hot topic. The presented method is based on the Spot test according to ASTM D 4740 but the spot is visualized, modified by software and converted into RGB histograms. The histograms provide the parameters necessary for the calculation of the V-value. This parameter was effectively correlated with the frequently used Total Sediment Accelerated and with other properties for the evaluation of the Fuel oil quality and stability.
Giancarlo Bizzarri - One of the best experts on this subject based on the ideXlab platform.
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Determination of trace elements in Fuel Oils by inductively coupled plasma mass spectrometry after acid mineralization of the sample in a microwave oven
Journal of Analytical Atomic Spectrometry, 1995Co-Authors: Maurizio Bettinelli, U. Baroni, S. Spezia, Giancarlo BizzarriAbstract:Trace elements in Fuel Oils have been analysed by inductively coupled plasma mass spectrometry (ICP-MS) after acid solubilization of the samples in a microwave oven. The results relative to the National Institute of Standards and Technology SRM 1634b and SRM 1619 show good accuracy and precision for about 20 elements. The detection limits are, for most of the elements, in the range 0.02–0.2 µg g–1; values that are consistent with the concentrations of metallic impurities present in Fuel Oils. The good agreement obtained on real samples using neutron activation analysis is a demonstration that ICP-MS can compete with a well established reference technique for the determination of trace metals in Fuel oil.
Abdul Waheed Bhutto - One of the best experts on this subject based on the ideXlab platform.
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Extractive denitrogenation of Fuel Oils using ionic liquids: a review
RSC Advances, 2016Co-Authors: Rashid Abro, Abdul Waheed Bhutto, Shurong Gao, Masroor Abro, Zeenat M. Ali, Asif Shah, Xiaochun ChenAbstract:Elimination of nitrogen (N) compounds contained in Fuel Oils is one of the essential processes for petroleum refinery due of their hindering consequences on the hydrodesulfurization (HDS) process. Traditional hydrodenitrogenation (HDN) techniques have some barriers to produce lower-N or N-free Fuel Oils, e.g., HDN is less effective to remove some cyclic N-compounds; HDN is expensive because of operating conditions such as high pressure and high temperature, and also requires the presence of an expensive catalyst and hydrogen. Application of ionic liquids (ILs) for the purpose of Fuel oil extractive denitrogenation (EDN) has been an important part of research in recent years, and it has shown huge potential as an effective substitute or supplemental technique to HDN. In the present review, we studied research results of EDN using ILs and have discussed widely the diversified factors influencing denitrogenation. This review concludes that EDN employing ILs has a promising future owing to the ideal physical and chemical characteristics of ILs; though for such a new technology there are some challenges, for which a discussion is also given. This review contributes proposals for possible commercial application of ILs in EDN.
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Oxidative desulfurization of Fuel Oils using ionic liquids: A review
Journal of The Taiwan Institute of Chemical Engineers, 2016Co-Authors: Abdul Waheed Bhutto, Rashid Abro, Shurong Gao, Tauqeer Abbas, Xiaochun ChenAbstract:Due to sterically-hindered adsorption of some thiophenic sulfur compounds (S-compounds) such as thiophene, dibenzothiophene and their derivatives on catalyst surface, hydrodesulfurization (HDS) is not effective to remove such thiophenic S-compounds in Fuel Oils. To produce clean Fuel Oils with lower S-content (e.g., S
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oxidative desulfurization of Fuel Oils using ionic liquids a review
Journal of The Taiwan Institute of Chemical Engineers, 2016Co-Authors: Abdul Waheed Bhutto, Rashid Abro, Shurong Gao, Tauqeer Abbas, Xiaochun ChenAbstract:Due to sterically-hindered adsorption of some thiophenic sulfur compounds (S-compounds) such as thiophene, dibenzothiophene and their derivatives on catalyst surface, hydrodesulfurization (HDS) is not effective to remove such thiophenic S-compounds in Fuel Oils. To produce clean Fuel Oils with lower S-content (e.g., S < 10 ppm), severe conditions such as high temperature, high pressure, active catalyst and complex process are required in HDS, which, however, results into higher cost, more olefin loss, and lower oil yield. Although some alternative methods such as extraction (EDS), oxidation (ODS), adsorption (ADS) and bio desulfurization (BDS) have been studied, no one is widely used in commercial scale due to some respective problems. In the past few decades, ODS of Fuel Oils using ionic liquids (ILs) has drawn increasing attentions, and many works have been published. In this new method, instead of traditional organic solvents, ILs are employed as extractants or/and catalysts, where S-compounds are extracted into ILs phase and oxidized to their sulfone products, and these more polar sulfones are removed easily. ILs have some advantages such as non-volatility, wide liquid range, high thermal and chemical stability, regenerability and reusability, which make this new ILs-based method avoid the problems such as solvent loss/contamination and difficult separation and regeneration in tradition ODS with organic solvents. It is worth noting that the numerous species and the designability of ILs produce a very huge candidate pool for selecting one suitable IL for oxidative desulfurization. Recently, many scientific findings about ODS using ILs have shown its good future. Here, we give a review for these interesting results to illustrate the novelty, problem and perspective of such a new method.
-
Desulphurization of Fuel Oils Using Ionic Liquids
Petrochemical Catalyst Materials Processes and Emerging Technologies, 2016Co-Authors: Abdul Waheed Bhutto, Rashid Abro, Tauqeer Abbas, Xiaochun ChenAbstract:Hydrodesulphurization (HDS) is a standard process for removing sulphur compounds in Fuel Oils in industry. HDS is effective to remove simple aliphatic sulphur compounds while less effective to remove thiophenes, dibenzothiophenes, and their derivatives because of sterically hindered adsorption on catalyst surface. Application of ionic liquids (ILs, a new class of compounds) substituting for traditional volatile organic solvents in extractive desulphurization (EDS) or oxidative desulphurization (ODS), have been being studied intensively in the latest decades, and many very promising results have been obtained, showing a good prospect as complement method to HDS. In this chapter, these fresh research results of EDS and ODS using ILs are summarized along with comprehensive discussions on diversified desulphurization factors along with some potential problems. It can be inferred that ILs are a class of potential ideal solvents to realize clean Fuel oil in future although some problems come too.
