Bandar Fadhel - Academia.edu (original) (raw)
Papers by Bandar Fadhel
Clean air and environmental quality, 2006
Dust deposition in the Wollongong-Port Kembla region, New South Wales, Australia, arising from lo... more Dust deposition in the Wollongong-Port Kembla region, New South Wales, Australia, arising from local industrial and mining activities, has been of major concern since the early 1960s. Reports dealing with dust deposition rates in the region have been published by different organisations where the data have been averaged for the region. This provides a general trend for the deposition rates for the whole region without considering the trends occurring in specific locations. This study was the first to examine the trends observed at 35 individual gauges to identify more localised trends in dust deposition rates in the Wollongong-Port Kembla region, and also to try and identify the contribution of some of the possible dust sources. The coverage span of the data was from 1991-2003. These data were compared with two guidelines. The results indicated that the trend for dust deposition rates in the Wollongong-Port Kembla region is, generally, decreasing, but the patterns for different gaug...
CO2 adsorption by dendrimers bound to mesoporous substrates
An overview on the microstructural evolution of Portland cement after carbonation curing and steam curing
The present study investigated the effect of the combined carbonation and steam curing on the phy... more The present study investigated the effect of the combined carbonation and steam curing on the physicochemical properties and CO2 uptake of the Portland cement concrete. Four different curing regimes were adopted during the initial 10 h of curing to evaluate the potential of carbonation curing as an alternative to conventional steam curing in the precast concrete industry from environmental and practical viewpoints. Four combinations of carbonation and steam curing conditions were applied as curing regimes to the samples at an early age. The test results indicated that the samples treated with the combined carbonation and steam curing exhibited higher early strength development compared to the other samples, signifying that carbonation curing can reduce the production time of precast concrete. Furthermore, the CO2 uptake capacity of the samples was calculated and found to be as high as 18% with respect to the mass of the paste samples. Hence, the simultaneous utilization of steam and...
Carbonation curing of cement blended with supplementary cementitious material (SCM): An over view
Science, 2020
Hu and Ruckenstein state that our findings were overclaimed and not new, despite our presentation... more Hu and Ruckenstein state that our findings were overclaimed and not new, despite our presentation of evidence for the Nanocatalysts on Single Crystal Edges (NOSCE) mechanism. Their arguments do not take into account fundamental differences between our Ni-Mo/MgO catalyst and their NiO/MgO preparations.
SPE Production & Facilities, 2002
Summary This paper describes the development of acidizing systems that use several different alde... more Summary This paper describes the development of acidizing systems that use several different aldehyde-based sulfide-suppression chemicals in conjunction with new acid-corrosion inhibitors. Specific combinations of these chemicals have allowed the acid to dissolve the FeS and suppress the formation of H2S, yet still enable acid inhibition to industry corrosion standards. Experimental results were compared with previously published data.1 Field acid treatments were accomplished successfully, and they resulted in large increases in gas production. The new chemicals and procedures will allow the operators to safely remove large amounts of fouling deposits while controlling the toxic and corrosive effects of H2S much more effectively than with previously used products. Introduction In many wells, pipelines, or in the hydrocarbon-processing units of refineries, iron-based surfaces may come into contact with sulfur containing fluids. At the temperatures present in the various sections or r...
Energy Procedia, 2013
A project devoted to establishing chemical-looping combustion with liquid fuels currently being c... more A project devoted to establishing chemical-looping combustion with liquid fuels currently being conducted by Chalmers University of Technology with support from Saudi Aramco is presented. The ultimate goal of the project is to develop technology capable of utilizing and processing heavy residual oils with inherent CO 2 capture. Up to this point, a continuously operating reactor with the nominal effect 300 W has been designed, constructed, and successfully operated with nickel-, manganese-, copper-and iron-based oxygen-carrier particles using non-sulfurous and sulfurous kerosene as fuel. The results so far are very promising, and 99% conversion of fuel carbon to CO 2 has been demonstrated with all four kinds of oxygen carrier materials. Chemical-looping reforming for synthesis gas production was also demonstrated using kerosene and the Ni-based oxygen carrier. Here, complete hydrocarbon conversion to CO and H 2 was achieved. Future work includes design and construction of a larger 10 kW reactor system for direct combustion of heavier fuels such as fuel oil and heavy vacuum residues, as well as a technoeconomic study. This paper provides an overview of the project and presents the main results and conclusions so far.
CO2 adsorption by neat versus impregnated pamam dendrimers
Response to Comment on “Dry reforming of methane by stable Ni–Mo nanocatalysts on single-crystalline MgO”
Science
Hu and Ruckenstein state that our findings were overclaimed and not new, despite our presentation... more Hu and Ruckenstein state that our findings were overclaimed and not new, despite our presentation of evidence for the Nanocatalysts on Single Crystal Edges (NOSCE) mechanism. Their arguments do not take into account fundamental differences between our Ni-Mo/MgO catalyst and their NiO/MgO preparations.
CO2 reforming of methane with a Ni-Mo-MgO nanocatalyst
ChemSusChem, Apr 2, 2020
Since 1887 Red Mud is an unavoidable waste derived from the production of alumina in the Bayer pr... more Since 1887 Red Mud is an unavoidable waste derived from the production of alumina in the Bayer process. Because of its high alkalinity and metal loading, Red Mud disposal and storage constitute an important environmental risk. With worldwide storage capacity reaching its limits and no alternatives to the Bayer Process, the development of methods for the valorization of Red Mud is a must. Here, we demonstrate that Red Mud can be turned into an efficient catalyst for the valorization of CO2. By a simple potassium promotion, 45% conversion of CO2 with a light olefin (C2-C4) selectivity of 36% has been achieved at 375 ºC, 30 bar and at 9600 mL•g-1 •h-1 , matching the performance of some of the best catalysts reported to date.
Dry reforming of methane by stable Ni–Mo nanocatalysts on single-crystalline MgO
Science
Large-scale carbon fixation requires high-volume chemicals production from carbon dioxide. Dry re... more Large-scale carbon fixation requires high-volume chemicals production from carbon dioxide. Dry reforming of methane could provide an economically feasible route if coke- and sintering-resistant catalysts were developed. Here, we report a molybdenum-doped nickel nanocatalyst that is stabilized at the edges of a single-crystalline magnesium oxide (MgO) support and show quantitative production of synthesis gas from dry reforming of methane. The catalyst runs more than 850 hours of continuous operation under 60 liters per unit mass of catalyst per hour reactive gas flow with no detectable coking. Synchrotron studies also show no sintering and reveal that during activation, 2.9 nanometers as synthesized crystallites move to combine into stable 17-nanometer grains at the edges of MgO crystals above the Tammann temperature. Our findings enable an industrially and economically viable path for carbon reclamation, and the “Nanocatalysts On Single Crystal Edges” technique could lead to stable ...
Materials (Basel, Switzerland), Jan 5, 2018
Accelerated carbonation curing (ACC) as well as partial replacement of cement with natural minera... more Accelerated carbonation curing (ACC) as well as partial replacement of cement with natural minerals are examples of many previous approaches, which aimed to produce cementitious products with better properties and environmental amicabilities. In this regard, the present study investigates CO₂ uptake of carbonation-cured cement blended with ground Saudi Arabian volcanic ash (VA). Paste samples with cement replacement of 20%, 30%, 40%, and 50% by mass were prepared and carbonation-cured after initial curing of 24 h. A compressive strength test, X-ray diffractometry (XRD), and thermogravimetry were performed. Although pozzolanic reaction of VA hardly occurred, unlike other pozzolana in blended cement, the results revealed that incorporation of VA as a supplementary cementitious material significantly enhanced the compressive strength and diffusion of CO₂ in the matrix. This increased the CO₂ uptake capacity of cement, reducing the net CO₂ emission upon carbonation curing.
Method for Removing Mercury from a Gaseous or Liquid Stream
Adsorption of CO2 on mesocellular siliceous foam iteratively functionalized with dendrimers
Adsorption, Oct 3, 2009
Abstract Melamine-type dendrimers are grafted to mesocellular siliceous foam (MCF) with ultralarg... more Abstract Melamine-type dendrimers are grafted to mesocellular siliceous foam (MCF) with ultralarge mesopores by stepwise alternating treatments of the substrate with 2, 4, 6-trichlorotriazine and ethylenediamine. MCF grafted dendrimers up to 4th generation are ...
Method and device to remediate oil spill
Carbon Dioxide Conversion to Hydrocarbon Fuel via Syngas Production Cell Harnessed from Solar Radiation
Methods for recovering organic heteroatom compounds from hydrocarbon feedstocks
Plant Based Material Useful in Adsorbing Petroleum Products, Processes for Making These, and Uses Thereof
Clean air and environmental quality, 2006
Dust deposition in the Wollongong-Port Kembla region, New South Wales, Australia, arising from lo... more Dust deposition in the Wollongong-Port Kembla region, New South Wales, Australia, arising from local industrial and mining activities, has been of major concern since the early 1960s. Reports dealing with dust deposition rates in the region have been published by different organisations where the data have been averaged for the region. This provides a general trend for the deposition rates for the whole region without considering the trends occurring in specific locations. This study was the first to examine the trends observed at 35 individual gauges to identify more localised trends in dust deposition rates in the Wollongong-Port Kembla region, and also to try and identify the contribution of some of the possible dust sources. The coverage span of the data was from 1991-2003. These data were compared with two guidelines. The results indicated that the trend for dust deposition rates in the Wollongong-Port Kembla region is, generally, decreasing, but the patterns for different gaug...
CO2 adsorption by dendrimers bound to mesoporous substrates
An overview on the microstructural evolution of Portland cement after carbonation curing and steam curing
The present study investigated the effect of the combined carbonation and steam curing on the phy... more The present study investigated the effect of the combined carbonation and steam curing on the physicochemical properties and CO2 uptake of the Portland cement concrete. Four different curing regimes were adopted during the initial 10 h of curing to evaluate the potential of carbonation curing as an alternative to conventional steam curing in the precast concrete industry from environmental and practical viewpoints. Four combinations of carbonation and steam curing conditions were applied as curing regimes to the samples at an early age. The test results indicated that the samples treated with the combined carbonation and steam curing exhibited higher early strength development compared to the other samples, signifying that carbonation curing can reduce the production time of precast concrete. Furthermore, the CO2 uptake capacity of the samples was calculated and found to be as high as 18% with respect to the mass of the paste samples. Hence, the simultaneous utilization of steam and...
Carbonation curing of cement blended with supplementary cementitious material (SCM): An over view
Science, 2020
Hu and Ruckenstein state that our findings were overclaimed and not new, despite our presentation... more Hu and Ruckenstein state that our findings were overclaimed and not new, despite our presentation of evidence for the Nanocatalysts on Single Crystal Edges (NOSCE) mechanism. Their arguments do not take into account fundamental differences between our Ni-Mo/MgO catalyst and their NiO/MgO preparations.
SPE Production & Facilities, 2002
Summary This paper describes the development of acidizing systems that use several different alde... more Summary This paper describes the development of acidizing systems that use several different aldehyde-based sulfide-suppression chemicals in conjunction with new acid-corrosion inhibitors. Specific combinations of these chemicals have allowed the acid to dissolve the FeS and suppress the formation of H2S, yet still enable acid inhibition to industry corrosion standards. Experimental results were compared with previously published data.1 Field acid treatments were accomplished successfully, and they resulted in large increases in gas production. The new chemicals and procedures will allow the operators to safely remove large amounts of fouling deposits while controlling the toxic and corrosive effects of H2S much more effectively than with previously used products. Introduction In many wells, pipelines, or in the hydrocarbon-processing units of refineries, iron-based surfaces may come into contact with sulfur containing fluids. At the temperatures present in the various sections or r...
Energy Procedia, 2013
A project devoted to establishing chemical-looping combustion with liquid fuels currently being c... more A project devoted to establishing chemical-looping combustion with liquid fuels currently being conducted by Chalmers University of Technology with support from Saudi Aramco is presented. The ultimate goal of the project is to develop technology capable of utilizing and processing heavy residual oils with inherent CO 2 capture. Up to this point, a continuously operating reactor with the nominal effect 300 W has been designed, constructed, and successfully operated with nickel-, manganese-, copper-and iron-based oxygen-carrier particles using non-sulfurous and sulfurous kerosene as fuel. The results so far are very promising, and 99% conversion of fuel carbon to CO 2 has been demonstrated with all four kinds of oxygen carrier materials. Chemical-looping reforming for synthesis gas production was also demonstrated using kerosene and the Ni-based oxygen carrier. Here, complete hydrocarbon conversion to CO and H 2 was achieved. Future work includes design and construction of a larger 10 kW reactor system for direct combustion of heavier fuels such as fuel oil and heavy vacuum residues, as well as a technoeconomic study. This paper provides an overview of the project and presents the main results and conclusions so far.
CO2 adsorption by neat versus impregnated pamam dendrimers
Response to Comment on “Dry reforming of methane by stable Ni–Mo nanocatalysts on single-crystalline MgO”
Science
Hu and Ruckenstein state that our findings were overclaimed and not new, despite our presentation... more Hu and Ruckenstein state that our findings were overclaimed and not new, despite our presentation of evidence for the Nanocatalysts on Single Crystal Edges (NOSCE) mechanism. Their arguments do not take into account fundamental differences between our Ni-Mo/MgO catalyst and their NiO/MgO preparations.
CO2 reforming of methane with a Ni-Mo-MgO nanocatalyst
ChemSusChem, Apr 2, 2020
Since 1887 Red Mud is an unavoidable waste derived from the production of alumina in the Bayer pr... more Since 1887 Red Mud is an unavoidable waste derived from the production of alumina in the Bayer process. Because of its high alkalinity and metal loading, Red Mud disposal and storage constitute an important environmental risk. With worldwide storage capacity reaching its limits and no alternatives to the Bayer Process, the development of methods for the valorization of Red Mud is a must. Here, we demonstrate that Red Mud can be turned into an efficient catalyst for the valorization of CO2. By a simple potassium promotion, 45% conversion of CO2 with a light olefin (C2-C4) selectivity of 36% has been achieved at 375 ºC, 30 bar and at 9600 mL•g-1 •h-1 , matching the performance of some of the best catalysts reported to date.
Dry reforming of methane by stable Ni–Mo nanocatalysts on single-crystalline MgO
Science
Large-scale carbon fixation requires high-volume chemicals production from carbon dioxide. Dry re... more Large-scale carbon fixation requires high-volume chemicals production from carbon dioxide. Dry reforming of methane could provide an economically feasible route if coke- and sintering-resistant catalysts were developed. Here, we report a molybdenum-doped nickel nanocatalyst that is stabilized at the edges of a single-crystalline magnesium oxide (MgO) support and show quantitative production of synthesis gas from dry reforming of methane. The catalyst runs more than 850 hours of continuous operation under 60 liters per unit mass of catalyst per hour reactive gas flow with no detectable coking. Synchrotron studies also show no sintering and reveal that during activation, 2.9 nanometers as synthesized crystallites move to combine into stable 17-nanometer grains at the edges of MgO crystals above the Tammann temperature. Our findings enable an industrially and economically viable path for carbon reclamation, and the “Nanocatalysts On Single Crystal Edges” technique could lead to stable ...
Materials (Basel, Switzerland), Jan 5, 2018
Accelerated carbonation curing (ACC) as well as partial replacement of cement with natural minera... more Accelerated carbonation curing (ACC) as well as partial replacement of cement with natural minerals are examples of many previous approaches, which aimed to produce cementitious products with better properties and environmental amicabilities. In this regard, the present study investigates CO₂ uptake of carbonation-cured cement blended with ground Saudi Arabian volcanic ash (VA). Paste samples with cement replacement of 20%, 30%, 40%, and 50% by mass were prepared and carbonation-cured after initial curing of 24 h. A compressive strength test, X-ray diffractometry (XRD), and thermogravimetry were performed. Although pozzolanic reaction of VA hardly occurred, unlike other pozzolana in blended cement, the results revealed that incorporation of VA as a supplementary cementitious material significantly enhanced the compressive strength and diffusion of CO₂ in the matrix. This increased the CO₂ uptake capacity of cement, reducing the net CO₂ emission upon carbonation curing.
Method for Removing Mercury from a Gaseous or Liquid Stream
Adsorption of CO2 on mesocellular siliceous foam iteratively functionalized with dendrimers
Adsorption, Oct 3, 2009
Abstract Melamine-type dendrimers are grafted to mesocellular siliceous foam (MCF) with ultralarg... more Abstract Melamine-type dendrimers are grafted to mesocellular siliceous foam (MCF) with ultralarge mesopores by stepwise alternating treatments of the substrate with 2, 4, 6-trichlorotriazine and ethylenediamine. MCF grafted dendrimers up to 4th generation are ...
Method and device to remediate oil spill
Carbon Dioxide Conversion to Hydrocarbon Fuel via Syngas Production Cell Harnessed from Solar Radiation
Methods for recovering organic heteroatom compounds from hydrocarbon feedstocks
Plant Based Material Useful in Adsorbing Petroleum Products, Processes for Making These, and Uses Thereof