Enabling Low-Temperature Methanol Activation via Lattice Oxygen Induced Cu–O–Cr Catalysis

ACS Catalysis, Год журнала: 2023, Номер 13(20), С. 13704 - 13716

Опубликована: Окт. 10, 2023

Steam reforming of methanol is a promising approach to achieving hydrogen storage, transportation, and in situ supply. However, this technology restricted by its high CO selectivity catalyst deactivation. In study, CuCr2O4-based catalytic oxygen carriers are tailored for lattice participating low-temperature reforming. We found that the activation originated from Cu–O–Cr structure intensification highly activated induction. Specifically, can be at temperatures as low 160 °C, on one hand, attributed reinforcement and, other owing reactive CuO4 tetrahedron CuCr2O4 spinel. Combined with XAS Raman results, formation demonstrated. The production rate an applied carrier 53.2% higher than control group without formulation. Satisfactory cyclic stability retained after 50th induction supplement cycle, ascribing strongly intensifies Cu–Cr2O3 interactions. DFT results reveal process CH3OH → CH3O* rate-determining step. Compared Cu(111) Cr2O3(110), Cu(111)/Cr2O3(110) surface exhibits lowest potential barrier during process, promoting

Язык: Английский

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Heterogeneous Fenton-like Photocatalytic Process towards the Eradication of Tetracycline under UV Irradiation: Mechanism Elucidation and Environmental Risk Analysis

Water, Год журнала: 2023, Номер 15(13), С. 2336 - 2336

Опубликована: Июнь 23, 2023

The problem of the deep elimination antibiotics in environmental bodies is exceptionally warranted. In this work, a ternary nanocomposite FeNi3/SiO2/CuS (FSC) was fabricated and then integrated with UV light irradiation hydrogen peroxide as heterogeneous Fenton-like photocatalytic system for decomposition tetracycline (TC) from aqueous media. During process, various influencing parameters such pH, catalyst dosage, initial content TC, (H2O2) dose, operating time were explored. At optimized circumstances, i.e., 5 10 mg/L TC concentration, 150 H2O2 200 min degradation time, proportion 96%. results capture agent tests clarified that hydroxyl radical (HO•) played predominant role decontamination TC. Moreover, elevated contact H2O2, efficiency increased significantly. Additionally, findings stability reusability experiments showed percentage removal decreased by only about 5% after six cycles. Furthermore, mechanism over FSC photocatalyst elucidated. Eventually, non-carcinogenic risk analysis surface water sample carried out using multiple processes first time. These outcomes obtained study validate coupling oxidation facilitates great variety pharmaceutical contaminants

Язык: Английский

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Solar-driven methanol steam reforming for low carbon and efficient hydrogen production: A review

Journal of Cleaner Production, Год журнала: 2024, Номер 436, С. 140587 - 140587

Опубликована: Янв. 1, 2024

Язык: Английский

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Techno-economic-environmental study and artificial intelligence-assisted optimization of a multigeneration power plant based on a gas turbine cycle along with a hydrogen liquefaction unit

Applied Thermal Engineering, Год журнала: 2023, Номер 237, С. 121660 - 121660

Опубликована: Сен. 23, 2023

Язык: Английский

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Evaluation of various properties for spent alumina catalyst and Si₃N₄ reinforced with PET-based polymer composite

Mechanics of Advanced Materials and Structures, Год журнала: 2023, Номер 31(26), С. 7777 - 7787

Опубликована: Сен. 5, 2023

AbstractIn the present work, mechanical, physical, wettability, and microstructure characterization were employed to evaluate performance of composite material. Uniform distribution with a good interfacial layer SAC Si3N4 was observed for PET/8.75%Si3N4+8.75% wasteSAC powder Results showed significant improvements in tensile (60.55%), hardness (150.99%), bending (228.47%), compressive strength (105.56%) compared neat PET-based composites after addition 8.75%Si3N4+8.75% powder. Therefore, studied could be replacement metals ceramics, various structural functional applications due their improved mechanical thermal properties.Keywords: Interfacial bondingSi3N4SACmechanical propertiespolymer compositepolyethylene terephthalate (PET) Disclosure statementNo potential conflict interest reported by author(s).

Язык: Английский

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Investigation of kinetics, thermodynamics, and environmental factors of biodiesel generation from sunflower and castor oil using rice husk ash/CuO/K2CO3 heterogeneous catalyst

Environmental Technology & Innovation, Год журнала: 2023, Номер 32, С. 103307 - 103307

Опубликована: Июль 27, 2023

In the current study, rice husk ash (RHA) was used as a support in fabrication of heterogeneous catalyst (RHA/CuO/K2CO3) for generating biodiesel from sunflower and castor oil. The value specific surface RHA, CuO, RHA/CuO, RHA/CuO/K2CO3 determined to be 3.63, 54.29, 25.47, 8.17 m2/g, respectively. Based on average roughness (Ra), inclusion CuO RHA structure improved which can improve interaction active phase (K2CO3) with structure. maximum production (99.2%) oil (98.1%) obtained at amount 3 wt%, 'CH3OH: oil' molar ratio 18:1, reaction temperature 65 °C, time 120 min. activation energy transesterification process calculated 52.79 40.09 kJ/mol, Also, ΔH number 50.05 37.35 respectively, shows that is an endothermic process. environmental factor (< 0.5), biocompatibility produced fuel confirmed. It should noted quality according ASTM D6751 EN 14214 standards replace traditional diesel.

Язык: Английский

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Edible waste oil to biofuel using reclaimable g-C3N4/HAp/Fe3O4/K2CO3 nanobiocomposite catalyst: Toxicity evaluation and optimization

Environmental Technology & Innovation, Год журнала: 2023, Номер 32, С. 103403 - 103403

Опубликована: Окт. 12, 2023

In the current work, new heterogeneous nonobiocomposite of g-C3N4/HAp/Fe3O4/K2CO3 was made from chicken bone and melamine used in biofuel generation edible waste oil (EWO). FTIR, SEM, Map-EDX, BET, VSM, XRD techniques confirmed that catalyst synthesized. The magnetic saturation number BET value were determined to be 8.89 emu.g-1 3.95 m2.g-1, respectively. impact temperature, time, mass, ratio methanol: Oil (MeOH: Oil) on production explored using response surface method-central composite design. maximum yield EWO (98.52%) achieved at contact time 150 min, temperature 65 oC, amount 3 wt%, MeOH: 15:1. Activation energy k0 for transesterification process computed 58.91 kJ.mol-1 3.24×107 min-1, values ΔH ΔG positive process, which indicates is exothermic non-spontaneous. environmental factor (E) also showed has negligible harmful effects environment. can effectively reused many times process. produced good compliance with famous standards serve as a suitable fuel source.

Язык: Английский

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Catalyst, reactor, reaction mechanism and CO remove technology in methanol steam reforming for hydrogen production: A review

Fuel Processing Technology, Год журнала: 2023, Номер 252, С. 108000 - 108000

Опубликована: Ноя. 25, 2023

Язык: Английский

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Micro-structure change and crystal-structure modulated of oxygen carriers for chemical looping: Controlling local chemical environment of lattice oxygen

Fuel, Год журнала: 2024, Номер 364, С. 131087 - 131087

Опубликована: Фев. 1, 2024

Язык: Английский

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Gas turbine-based system taking advantage of LNG regasification process for multigeneration purposes; Techno-economic-environmental analysis and machine learning optimization

Process Safety and Environmental Protection, Год журнала: 2023, Номер 179, С. 10 - 26

Опубликована: Авг. 26, 2023

Язык: Английский

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