Improvement of design synthetic nano-catalysts for performance enhancement of oxidative desulfurization using batch reactor

Fathi, Mohammed I.; Humadi, Jasim I.; Mahmood, Qahtan A.; Nawaf, Amer T.; S., Rafah Sami Ayoub R.

doi:10.1063/5.0109089

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…This behavior can be returned to the significant occupation of the Fe2O3 pores via MnO2. The deposition of active metal oxide in the pores of the catalyst support also led to blockage and interference in nitrogen diffusion (Aabid et al, 2023;Fathi, Humadi, Mahmood, Nawaf, & Ayoub RS, 2022;Humadi et al, 2023).The results of XRD patterns for the synthesis catalysts were explained in previous study (Hamad et al, 2022a). The scanning electron microscope (SEM) for the synthesis (2% MnO2/Fe2O3) and (5% MnO2/Fe2O3) catalysts were showed in Figures 2 and 3.…”

Section: Catalyst Characterizationmentioning

confidence: 69%

“…As shown in Figure 6, the catalytic oxidation of phenol was promoted by increasing the reaction temperature of all designed catalysts. This is because the increase of the reaction temperature will lead to the dissociation of H2O2 in the wastewater leading to an increase in the generation of hydroxyl radicals (Fathi et al, 2022;Humadi et al, 2021;Jafar et al, 2021;Zazo, Pliego, Blasco, Casas, & Rodriguez, 2011). Furthermore, increasing the reaction temperature may lead to a significant increase in H2O2 consumption and decomposition of organic pollutants in wastewater (Rueda Márquez, Levchuk, & Sillanpää, 2018).…”

Section: Influence Of Reaction Temperaturementioning

confidence: 99%

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Removal efficiency and reaction kinetics of phenolic compounds in refinery wastewater by nano catalytic wet oxidation

Issa

Hamad²,

Algawi

et al. 2023

Int. J. Renew. Energy Dev.

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A novel nano-catalyst based on iron oxide (MnO2/Fe2O3) was developed to promote wet oxidation of phenol. MnO2 was doped in Fe2O3 matrix to prepare composite nano-catalyst with different doping percentage (0, 2 and 5%). The catalytic phenol oxidation was conducted under different reaction temperatures and residence times. To evaluate the optimal kinetic parameters aiming to maximize phenol removal under the optimal conditions for the catalytic wet phenol oxidation process, modeling was applied on the batch reactor using the novel synthesis nano-catalyst (MnO2/Fe2O3) and the model developed was fed with the experimental data. gPROMS package was used to model the process of phenol oxidation and to optimize the experimental data. The error predicted between the simulated and experimental data was less than 5%. The optimal operating conditions were 294 min residence time, 70oC reaction temperature, and 764 ppm initial concentration of phenol over the prepared 5% MnO2/Fe2O3. Running of wet oxidation of phenol under the optimal operating conditions resulted in 98% removal of phenol from refinery wastewater.

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Section: Catalyst Characterizationmentioning

confidence: 69%

Section: Influence Of Reaction Temperaturementioning

confidence: 99%

Removal efficiency and reaction kinetics of phenolic compounds in refinery wastewater by nano catalytic wet oxidation

Issa

Hamad²,

Algawi

et al. 2023

Int. J. Renew. Energy Dev.

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“…Continuous ADS of a real and an MDF was carried out in an FBAC using seven different types of AC (AC, AC-M1, AC-M2, AC-M3, AC-M4, AC-M5, and AC-M6), bed height (3, 6, and 9 cm), and LHSV (4,8,11,15,30,45,60, and 75 h −1 ), at ambient conditions. The data of FTIR spectra for AC-M1 adsorbent showed higher concentrations of hydroxyl groups that promoted a higher rate of sulfur removal from diesel fuel.…”

Section: Discussionmentioning

confidence: 99%

“…The US Environmental Protection Agency and the European Union both recently announced stringent restrictions that set the maximum permitted sulfur concentration at 10 and 15 ppm, respectively. [6][7][8][9][10][11][12][13] Adsorptive desulfurization (ADS) is one of the alternatives to hydrodesulfurization (HDS) that has a high cost of production because it requires harsh working conditions. Due to its low energy and material requirements, the ADS is currently regarded as a potential desulfurization process.…”

Section: Introductionmentioning

confidence: 99%

“…Disulfides, mercaptans, thiophenes (TH), and their derivatives, such as pentathiophene (BT) and dibenzothiophene (DBT), are typical organic sulfur compounds (OSCs) found in fuels. The US Environmental Protection Agency and the European Union both recently announced stringent restrictions that set the maximum permitted sulfur concentration at 10 and 15 ppm, respectively 6–13 . Adsorptive desulfurization (ADS) is one of the alternatives to hydrodesulfurization (HDS) that has a high cost of production because it requires harsh working conditions.…”

Section: Introductionmentioning

confidence: 99%

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Efficient immobilization of acids into activated carbon for high durability and continuous desulfurization of diesel fuel

Hamad,

Humadi,

Abdulkareem

et al. 2023

Energy Science & Engineering

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Fuel contaminants are the most critical issues in human health, cars' engines life and performance, and refinery equipment, and have an ultimate consecutive economic negative impact over time. Nowadays, sulfur is considered as one of the most dangerous contaminants in fuel, and different approaches have been carried out for desulfurization processing. In this study, new modified activated carbon (AC) for adsorptive diesel fuel desulfurization is carried out. To increase the robustness and effectiveness of a continuous adsorptive desulfurization (ADS) process, the study provides a new surface modification technique of the AC. Real diesel fuel (RDF, sulfur content 7510 ppm) and model diesel fuel (MDF, dibenzothiophene content 637 ppm) were used in a series of ADS tests carried out in a fixed‐bed adsorption column under atmospheric pressure and temperature. To achieve zero emissions of diesel fuel, the process parameters were optimized using the experimental findings. The AC and modified AC were tested via Brunauer–Emmett–Teller and Fourier Transform Infrared to evaluate the effect of the modification process on adsorbent characterization. The liquid hourly space velocity of the feedstock, the height of the absorber bed, and the kind of AC were the optimization parameters. In these circumstances, the ADS procedure was examined to address the impact of the feedstock flow rate on the effectiveness of ADS. The sulfur removal efficiency was 85.3% for RDF and 94% for MDF at 9 cm bed height, 8 h−1 LSHV, and 10 g bed weight, respectively. This is the first time that AC has been used to examine the stability of continuous ADS and to examine how acid immobilization affects sulfur removal. The investigation showed that the modified AC had a high rate of stability and was effective in the continuous ADS process. The spent modified AC was regenerated via a solvent extractive regeneration process to evaluate the durability of the ACs. The results proved that the regeneration performance of various solvents for modified activated carbon 1 decreases as follows: iso‐octane > ethanol > methanol > acetonitrile.

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Fast treatment for refinery wastewater via a new wet nano-catalytic oxidation process: experimental study and ANN model

Hasan,

Shihab,

Humadi

et al. 2023

Int. J. Environ. Sci. Technol.

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Improvement of design synthetic nano-catalysts for performance enhancement of oxidative desulfurization using batch reactor

Cited by 10 publications

References 11 publications

Removal efficiency and reaction kinetics of phenolic compounds in refinery wastewater by nano catalytic wet oxidation

Removal efficiency and reaction kinetics of phenolic compounds in refinery wastewater by nano catalytic wet oxidation

Efficient immobilization of acids into activated carbon for high durability and continuous desulfurization of diesel fuel

Fast treatment for refinery wastewater via a new wet nano-catalytic oxidation process: experimental study and ANN model

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