Physicochemical characteristics of calcined MnFe2O4 solid nanospheres and their catalytic activity to oxidize para-nitrophenol with peroxymonosulfate and n-C7 asphaltenes with air

Mateus, Lucía; Moreno‐Castilla, Carlos; López-Ramón, M.V.; Cortés, Farid B.; Álvarez, Miguel Fernández; Medina, Oscar E.; Franco, Camilo A.; Yebra‐Rodríguez, África

doi:10.1016/j.jenvman.2020.111871

Cited by 22 publications

(9 citation statements)

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“…Hence, advanced strategies are needed to circumvent the problem. − The catalytic oxidation of asphaltenes using nanoparticles is attractive, but the synthesized materials tested were far from perfect. The major shortcoming is the reduction of the oxidative asphaltene decomposition temperature. − In most cases, it occurs at temperatures greater than 300 °C. ,− The importance of reducing the oxidative decomposition temperature of asphaltenes lies in the subsequent improvement in the crude oil quality. Different thermal experiments carried out in atmospheres of air, steam, and inert have shown that reducing the content of asphaltenes in the crude oil matrix leads to a reduction in the crude oil viscoelastic network and density and, therefore, higher mobility to reservoir and surface conditions. − …”

Section: Introductionmentioning

confidence: 99%

Insights into the Morphology Effect of Ceria on the Catalytic Performance of NiO–PdO/CeO₂ Nanoparticles for Thermo-oxidation of n-C₇ Asphaltenes under Isothermal Heating at Different Pressures

et al. 2021

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The overall objective of this study is to evaluate the effect of morphologies (C, cubic; O, orthorhombic; and S, spherical) of ceria in the catalytic activity for n-C7 asphaltene thermo-oxidation. In this way, cubic (C-CeO2), orthorhombic (O-CeO2), and spherical (S-CeO2) ceria nanoparticles were synthesized using the hydrothermal method and doped with 1.0% in a mass fraction of Ni and Pd oxides by incipient wetness impregnation. The catalytic activity of the systems was evaluated through non-isothermal and isothermal thermogravimetric analyses at different pressures. The non-isothermal thermogravimetric results evidenced an increase in the n-C7 asphaltene mass as the temperature increases between 100 and 230 °C for all systems and operating conditions. At 3.0 MPa, n-C7 asphaltene gains 3.6, 5.8, and 3.2% for O-CeO2, C-CeO2, and S-CeO2, respectively, while at 6.0 MPa, there is an increase of 7.3, 10.4, and 5.9% for the same systems, respectively. The Ni and Pd phases increase the amount of oxygen chemisorbed in all systems in the order S-NiPdCe < O-NiPdCe < C-NiPdCe and reduce the temperature required for the total n-C7 asphaltene decomposition at temperatures lower than 200 °C at 6.0 MPa in the same order. Also, isothermal thermogravimetric analysis demonstrates that the asphaltene conversion increased with ceria-based nanocatalysts in the increasing order S-CeO2 < O-CeO2 < C-CeO2. Cubic CeO2 doped with Ni and Pd presents the highest yield, reaching 100% conversion at 170 °C and 6.0 MPa at 60 min. The data confirm that the presence of Ni and Pd facilitate the transference oxygen vacancies between the bulk and surface of the nanocatalyst, and therefore, the catalytic activity is enhanced. The catalytic activity, in turn, is improved by the presence of {110}, {100}, and {111}, oxygen vacancies, and Ce3+ and NiO–Ce species. This work reveals the benefits of structured cubic ceria nanocatalysts as a promising support for nickel- and palladium-containing materials for n-C7 asphaltene decomposition.

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Section: Introductionmentioning

confidence: 99%

Insights into the Morphology Effect of Ceria on the Catalytic Performance of NiO–PdO/CeO₂ Nanoparticles for Thermo-oxidation of n-C₇ Asphaltenes under Isothermal Heating at Different Pressures

et al. 2021

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“…To correct the buoyancy effect of the gas flow, for each test, two different runs were accomplished with empty and solid-filled sample containers. Then, the obtained mass profile for each sample was reduced for the empty sample container. − Figure shows the schematic diagram of the experimental system assembled for CO 2 sorption in flue gas streams.…”

Section: Methodsmentioning

confidence: 99%

Enhanced Carbon Storage Process from Flue Gas Streams Using Rice Husk Silica Nanoparticles: An Approach in Shallow Coal Bed Methane Reservoirs

et al. 2023

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Carbon capture and storage (CCS) is considered a key process to reach net-zero emission by the 2050 aim of limiting global warming. Coal bed methane (CBM) is considered potential geological reservoirs for underground CCS due to the CO2–CH4 exchange feasibility by adsorptive phenomena. Global implementation has been focused only on deep reservoirs to provide methane recovery. Thus, this work proposes a modified CCS process based on silica nanoparticle inclusion for shallow CBM reservoirs (<300 m). The nanomaterials were evaluated at high pressure in two main stages including i) CO2 sorption on a single CO2 stream and ii) CO2 selectivity on a flue gas stream (N2–CO2 mixture). This work includes silica nanomaterial synthesized from rice husk as agro-waste sources with better technical-economic feasibility framed in a circular economy to reduce costs and maximize the use of available resources. Rice husk silica (RSi) nanoparticles were doped with 1.0, 3.0, and 5.0 wt % of urea (Si–U), diethylamine (Si-DE), triethylamine (Si-TE), and ethylenediamine (Si-EM) to enhance the CO2 sorption. First, CO2 sorption was evaluated at 30 °C and between 0.084 and 3 MPa using a CO2 stream to determine the best-doped amount of each N-source. Then, the best nanoparticles were used to impregnate CBM at 10 and 20 wt %, and the subsequent CO2 storage on the flue gas stream (70% v/v N2 and 30% v/v CO2) was done. The results showed that CO2 sorption on RSi increases with the N-group coating in the order RSi-DE < RSi-TE < RSi-U < RSi-EM. Also, the best-doped amount for each N-source was 3 wt %. For CBM impregnation, the nanofluid containing 20 wt % of RSi-EM3 presented the best yield increasing the CO2 sorption from 0.05 to 0.75 mmol g–1, meaning an increase of more than 1000% in the sorption capacity.

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“…MSN was prepared following a previously reported solvothermal method [11], and MSN350 was obtained after calcining MSN at 350 °C in an air-oven for 4 h, as described elsewhere [12]. Details of the synthesis are given in Text S1 of Supplementary material.…”

Section: Preparation Of Mnfe 2 O 4 Solid Nanospheresmentioning

confidence: 99%

Influence of the hydrodynamic size and ζ potential of manganese ferrite nanozymes as peroxidase-mimicking catalysts at pH 4 in different buffers

Moreno‐Castilla

Naranjo

López-Ramón

et al. 2022

Journal of Catalysis

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Physicochemical characteristics of calcined MnFe2O4 solid nanospheres and their catalytic activity to oxidize para-nitrophenol with peroxymonosulfate and n-C7 asphaltenes with air

Cited by 22 publications

References 59 publications

Insights into the Morphology Effect of Ceria on the Catalytic Performance of NiO–PdO/CeO₂ Nanoparticles for Thermo-oxidation of n-C₇ Asphaltenes under Isothermal Heating at Different Pressures

Insights into the Morphology Effect of Ceria on the Catalytic Performance of NiO–PdO/CeO₂ Nanoparticles for Thermo-oxidation of n-C₇ Asphaltenes under Isothermal Heating at Different Pressures

Enhanced Carbon Storage Process from Flue Gas Streams Using Rice Husk Silica Nanoparticles: An Approach in Shallow Coal Bed Methane Reservoirs

Influence of the hydrodynamic size and ζ potential of manganese ferrite nanozymes as peroxidase-mimicking catalysts at pH 4 in different buffers

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Physicochemical characteristics of calcined MnFe2O4 solid nanospheres and their catalytic activity to oxidize para-nitrophenol with peroxymonosulfate and n-C7 asphaltenes with air

Cited by 22 publications

References 59 publications

Insights into the Morphology Effect of Ceria on the Catalytic Performance of NiO–PdO/CeO2 Nanoparticles for Thermo-oxidation of n-C7 Asphaltenes under Isothermal Heating at Different Pressures

Insights into the Morphology Effect of Ceria on the Catalytic Performance of NiO–PdO/CeO2 Nanoparticles for Thermo-oxidation of n-C7 Asphaltenes under Isothermal Heating at Different Pressures

Enhanced Carbon Storage Process from Flue Gas Streams Using Rice Husk Silica Nanoparticles: An Approach in Shallow Coal Bed Methane Reservoirs

Influence of the hydrodynamic size and ζ potential of manganese ferrite nanozymes as peroxidase-mimicking catalysts at pH 4 in different buffers

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Insights into the Morphology Effect of Ceria on the Catalytic Performance of NiO–PdO/CeO₂ Nanoparticles for Thermo-oxidation of n-C₇ Asphaltenes under Isothermal Heating at Different Pressures

Insights into the Morphology Effect of Ceria on the Catalytic Performance of NiO–PdO/CeO₂ Nanoparticles for Thermo-oxidation of n-C₇ Asphaltenes under Isothermal Heating at Different Pressures