An Eco-friendly Process to Produce High-Purity Nano-γ-Al2O3 from Aluminum Scrap Using a Novel Electrolysis Technique for Petroleum Industry Applications

Baqur, Mohammed S.; Hamied, Ramzy S.; Sukkar, Khalid A.

doi:10.1007/s13369-023-07877-8

Cited by 7 publications

(3 citation statements)

References 42 publications

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“…On the other hand, it would be advantageous to substitute some cheap materials from natural sources with a high performance into cement production [4,12,34], as this could extend the uses of UHPC to many construction engineering projects under severe conditions. This can be achieved by accurately managing different additions to the UHPC composition [35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

“…The major benefits of the addition of green materials to concrete are reducing the cement amount, reducing environmental pollution, producing efficient concrete for high stress loads, and lowering the economic cost. Usually, green additions to UHPC include fine sand, quartz, metakaolin, and silica fume [22,36]. Other materials may be also added to UHPC, such as fly ash, waste concrete, waste glass, polymers (polypropylene), and stainless-steel wires [47].…”

Section: Introductionmentioning

confidence: 99%

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Development and Performance Evaluation of UHPC and HPC Using Eco-Friendly Additions as Substitute Cementitious Materials with Low Cost

2023

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Ultra-high-performance concrete (UHPC) and high-performance concrete (HPC) are widely used in construction engineering applications. The quality and economy of this type of concrete are the main challenges in real construction systems due to their expensive cost. In the present investigation, the performances of UHPC and HPC were improved using eco-friendly additives from natural sources or industrial wastes. Accordingly, different kinds of concrete mixtures were prepared with the addition of various eco-friendly materials, such as metakaolin (10, 15, and 20%), silica fume (2.5, 5, 10, and 15%), cement kiln dust (CKD) (0, 5, and 10%), and 1 vol.% of steel and polypropylene fibers. All of these materials were subjected to efficient treatment and purification processes. The results indicated that the prepared UHPC was characterized by high compression and flexural strengths. The prepared UHPC (sample CR-2) with metakaolin (10%), CKD (10%), and 1 vol.% of steel fibers provided the highest compressive strength of 135 MPa at 28 days. Moreover, the results showed that reducing the cement amounts to 750, 500, and 250 kg/m3 provided concrete with efficient structural requirements and specifications and can be characterized as UHPC and HPC. Also, the mixture (sample CM15) with a metakaolin addition of 15%, CKD of 100 kg/m3, and 1 vol.% of steel fibers showed the highest flexural strength of 19.14 MPa at 28 d. Moreover, the highest splitting tensile strength of the prepared UHPC cylinders was 9.6 MPa at 28 d for the MSS1000 sample, which consisted of 15% metakaolin, a cement content of 1000 kg/m3, silica fume of 10%, and steel fibers of 1% vol. The prepared UHPC mixtures will reduce the amount of consumed cement and the production cost, with a high performance in comparison to classical concrete. Finally, it was clear that the prepared UHPC and HPC concrete with green additions can serve efficiently in specific construction applications, with high performance, economic feasibility, and safe environmental impacts.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development and Performance Evaluation of UHPC and HPC Using Eco-Friendly Additions as Substitute Cementitious Materials with Low Cost

2023

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“…Due to the difficulty of predicting the flow behavior in a BCR, evaluation of the superficial gas velocity can contribute to the determination of the flow patterns, as well as the exact hydrodynamic behavior. Therefore, more extensive work is needed to reveal the relationship between the gas-liquid-solids in a BCR in terms of removing phenol from wastewater [34][35][36][37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Combining α-Al2O3 Packing Material and a ZnO Nanocatalyst in an Ozonized Bubble Column Reactor to Increase the Phenol Degradation from Wastewater

Majhool,

Sukkar,

Alsaffar

2023

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The ozonation reaction in a bubble column reactor (BCR) has been widely used in the removal of phenol from wastewater, but the phenol removal efficiency in this type of reactor is limited because of low ozone solubility and reactivity in the system. In the present study, the phenol degradation in the BCR was enhanced by using α-Al2O3 as a packing material and a ZnO nanocatalyst. The reactor diameter and height were 8 cm and 180 cm, respectively. The gas distributor was designed to include 52 holes of a 0.5 mm diameter. Also, the gas holdup, pressure drop, and bubble size were measured as a function of the superficial gas velocity (i.e., 0.5, 1, 1.5, 2, 2.5, and 3 cm/s). The evaluation of the hydrodynamic parameters provided a deeper understanding of the ozonation process through which to select the optimal operating parameters in the reactor. It was found that the best superficial gas velocity was 2.5 cm/s. A complete (100%) phenol removal was achieved for phenol concentrations of 15, 20, and 25 ppm at reaction times of 80, 90, and 100 min, respectively; this was achieved by using α-Al2O3 packing material and a ZnO nanocatalyst in the BCR. Additionally, a reaction kinetics study was conducted to describe the ozonation reaction in BCR. The first-order reaction assumption clearly describes the reaction kinetics with an R2 = 0.991. Finally, the applied treatment method can be used to efficiently remove phenol from wastewater at a low cost, with a small consumption of energy and a simple operation.

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Multi-scale Simulation of Dendritic Growth in Laser-Melted Alumina

Abubakar

2024

Arab J Sci Eng

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An Eco-friendly Process to Produce High-Purity Nano-γ-Al2O3 from Aluminum Scrap Using a Novel Electrolysis Technique for Petroleum Industry Applications

Cited by 7 publications

References 42 publications

Development and Performance Evaluation of UHPC and HPC Using Eco-Friendly Additions as Substitute Cementitious Materials with Low Cost

Development and Performance Evaluation of UHPC and HPC Using Eco-Friendly Additions as Substitute Cementitious Materials with Low Cost

Combining α-Al2O3 Packing Material and a ZnO Nanocatalyst in an Ozonized Bubble Column Reactor to Increase the Phenol Degradation from Wastewater

Multi-scale Simulation of Dendritic Growth in Laser-Melted Alumina

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