New Journal of Chemistry, Год журнала: 2025, Номер unknown
Опубликована: Янв. 1, 2025
La effectively promotes propylene production over Ga/ZSM-5 catalyst in CO 2 -ODHP.
Язык: Английский
ACS Catalysis, Год журнала: 2023, Номер 13(7), С. 4719 - 4741
Опубликована: Март 23, 2023
Propylene is one of the most important building blocks for chemical industry. Traditional propylene production, which based on oil-based cracking processes, being challenged by drastic changes in global energy situation. The nonoxidative propane dehydrogenation (PDH) technique has emerged as a high-value-rising and promising alternative to traditional production techniques due distinct price variance between propylene. Although this been commercialized decades, thermally induced deactivation still big problem. Substantial progress made inhibit catalysts. In review, we briefly introduce mechanism catalytic deactivation, including coke deposition sintering active compounds. design strategies PDH catalysts, focused improving stability recyclability, are highlighted from aspects site regulation, metal–support interaction enhancement, support modification. Finally, current status prospects future catalyst development also discussed.
Язык: Английский
Процитировано
86
ACS Catalysis, Год журнала: 2024, Номер 14(2), С. 757 - 775
Опубликована: Янв. 2, 2024
The studies of metal phosphides (MPs) have flourished in the past decades due to their exceptional catalytic performance thermo-, electro-, and photocatalysis. In this review, we summarize synthesis methods MPs attribute unique properties electronic, geometric, synergetic modifications. multifunctionality phosphorus doping makes phosphide an atypical catalyst. withdraws electrons from sites, isolates provides sites simultaneously, leading high activities various reactions, such as hydroformylation, hydrogen evolution reaction (HER), photocatalytic H2 production. variety enables rational design catalysts based on requirements different reactions expands application scenarios MPs. This review summarizes structure–performance relationship MPs, paving way for future catalyst mechanism studies.
Язык: Английский
Процитировано
27
Опубликована: Янв. 1, 2023
The rapid growth in industrialization and population has resulted the generation permanence of a wide variety inorganic organic pollutants, posing potential risks to environment human health. degradation (either removal or reduction) sensing these pollutants from various environmental media (e.g., air, water, soil) are nowadays important problems worldwide. To address this issue, several nanotechnologies numerous nanostructured materials composites have been established for efficient remediation applications. This is ascribed their large surface area improved characteristics efficiency (like high reactive feature). current chapter reports such as filtration, photocatalysis, chemical reactions, absorption, adsorption, nanosensing, etc. It also offers an overview use environment. Novel materials, involving inorganic-based nanomaterials (NMs) zero-valent metal NMs, oxide-based silica-based NMs), carbon-based polymeric-based well nanocomposites were extensively reported discussed. These efficiently employed remediating halogenated herbicides, volatile compounds, chlorinated aromatic aliphatic hydrocarbons, pharmaceuticals, dyes, heavy metals, biological substances antibiotics, parasites, bacteria, viruses), gases (NOx, CO, SO2, etc.). Their efficiency, advantages, limitations compared Moreover, some directions future studies proposed.
Язык: Английский
Процитировано
34
ACS Catalysis, Год журнала: 2025, Номер unknown, С. 4089 - 4100
Опубликована: Фев. 21, 2025
Язык: Английский
Процитировано
1
ACS Catalysis, Год журнала: 2023, Номер 13(16), С. 11153 - 11163
Опубликована: Авг. 8, 2023
Ethane dehydrogenation provides an opportunity for the effective utilization of shale gas and production ethene. Up to now, it is still a great challenge acquire stable ethane catalyst operated under high temperature reductive atmospheres. In this study, we prepared Fe-based supported on MgAl2O4 with atomically dispersed iron species even after 6 reaction–regeneration cycles. Sheet-like morphology spinel structure beneficial dispersion Fe species. The undergoes reduction, sintering, detachment during reaction, as evidenced by in situ High-Angle Annular Dark-Field Scanning Transmission Electron Microscopy quasi-in 57Fe Mössbauer spectroscopy. By contrast, introduction CO2 leads slow deactivation, where only partial reduction isolated Fe3+ Fe2+ was observed. And activity could be restored simple O2 treatment. current work sheds light design high-efficient catalysts.
Язык: Английский
Процитировано
22
Chemical Engineering Science, Год журнала: 2023, Номер 275, С. 118748 - 118748
Опубликована: Апрель 13, 2023
Язык: Английский
Процитировано
21
Reaction Chemistry & Engineering, Год журнала: 2024, Номер 9(6), С. 1292 - 1312
Опубликована: Янв. 1, 2024
Propane dehydrogenation (PDH) has become an important strategy to address the ever-increasing global demand for propene.
Язык: Английский
Процитировано
8
AIChE Journal, Год журнала: 2024, Номер 70(6)
Опубликована: Март 11, 2024
Abstract Propylene serves as a crucial feedstock for wide range of industries engaged in the production diverse petrochemical products. Propane dehydrogenation, an appealing technology aimed at supplanting conventional methodologies, confronts significant hurdles attributable to coke deposition and sintering Pt‐based catalysts. Here, we report Ir single atom encapsulated silicalite‐1 zeolite modified with Sn atoms electronic promoters, displaying remarkable activity stability, which is significantly greater than previously reported Ir‐based catalysts comparable majority under similar industrial conditions (600°C, C 3 H 8 /H 2 = 2/1). Spectroscopies results reveal that introduction promotes transfer electrons from atoms, forming electron‐rich δ+ species. DFT calculations show unique structure lowers energy barrier two‐step dehydrogenation well favors adsorption propane desorption propylene, thus enhancing stability.
Язык: Английский
Процитировано
7
AIChE Journal, Год журнала: 2024, Номер 70(5)
Опубликована: Фев. 4, 2024
Abstract The preparation of Co‐based catalysts with a single, highly dispersed active site is challenging and crucial for the high‐performance propane dehydrogenation (PDH) owing to harsh reaction conditions. Herein, synergetic strategies including catalyst hydrothermal treatment CO 2 introduction are adopted realize stable T d ‐Co(II) applied PDH. According systematic characterizations catalytic performance evaluation, facial improves C 3 H 6 formation rate from 456 771 mmol g Co −1 h stability via transformation O 4 species species. Meanwhile, further into PDH system as protective reagent state would facilitate superior TOF 700 970 . It revealed that maintains inhabiting generation metallic spices.
Язык: Английский
Процитировано
7
ACS Catalysis, Год журнала: 2023, Номер 13(22), С. 14864 - 14873
Опубликована: Ноя. 2, 2023
The CO2-assisted oxidative dehydrogenation (CO2-ODH) of C3H8 provides a promising process for producing C3H6 and utilizing CO2. In this study, the combination zinc iron demonstrated synergistic effect, leading to improved catalytic activity stability. importance reducibility ZnFe2Ox/S-1 has been highlighted through auxiliary experiments comprehensive characterizations. presence sodium additives is found hinder reduction by inducing strong interactions. Furthermore, during initial stage reaction, initiates promotes CO2 conversion decarbonization reactions. precursor ZnFe2O4 interaction between Zn Fe species, along with formation α-Fe from inside outside, effectively prevent occurrence reforming reaction suppress coking deactivation ZnFe2Ox/S-1. This study fundamental insights into Zn- Fe-based catalysts in reaction.
Язык: Английский
Процитировано
16