Magnetically recoverable Mg substituted zinc ferrite nanocatalyst for biodiesel production: Process optimization, kinetic and thermodynamic analysis

Ashok, Anuradha; Ratnaji, T.; Kennedy, L. John; Vijaya, J. Judith; Pragash, R. Gnana

doi:10.1016/j.renene.2020.08.081

Cited by 64 publications

(9 citation statements)

References 38 publications

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“…Among these solids, nanocatalysts stand out due to their various inherent characteristics, including easy operational procedure, high stability, high surface area, the presence of acidic sites, efficient catalytic activity, and the ability to reuse 48,98 . This last characteristic is a particularly preponderant advantage of the magnetic nanocatalysts, since they stand out for the simplicity of recovery by a magnetic field, being able to participate effectively in several reuse cycles 31,99‐101 …”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, so far, the vast majority of studies reported in the literature focus on the synthesis of these materials only with small‐scale production 29‐31 . There are few studies focused on the improvement of ingenious synthesis methods such as the combustion reaction, which through viable strategies can make it possible the scale‐up of the production and to promote a reduction of the high costs currently practiced at the commercial manufacture of these materials.…”

Section: Introductionmentioning

confidence: 99%

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Biodiesel production on bench scale from different sources of waste oils by using NiZn magnetic heterogeneous nanocatalyst

et al. 2021

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Summary Different types of waste oils (soybean, sunflower, corn, and cottonseed) were evaluated in simultaneous esterification and transesterification reactions for more sustainable production of biodiesel by heterogeneous magnetic catalysis. The Ni0.5Zn0.5Fe2O4 magnetic nanoparticles (MNPs) were synthesized by combustion reaction on a pilot‐scale of 200 g/batch, showing obvious conditions for possible scalability for large scale production. The properties of the MNPs were investigated by X‐ray diffraction, Rietveld refinement, UV‐Vis, Brunauer, Emmett, and Teller/Barrett, Joyner, and Halenda method, granulometric distribution, pH, zeta potential, and NH3‐TPD. The results confirmed the formation of the majority phase of the inverse NiZn spinel, with median particle of 39.6 nm, and surface area of 64 m2/g with acid character. The quality measures provide the adequacy of the biodiesel obtained and the gas chromatography showed conversions from 86.65% to 98.12%. Finally, the MNPs were successfully recovered and reused in three more cycles without activity loss, and with capacity for new recycles due to its high reactivity and stability.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biodiesel production on bench scale from different sources of waste oils by using NiZn magnetic heterogeneous nanocatalyst

et al. 2021

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“…The type of acidity present is influential, since Lewis acids tend to favour triglyceride transesterification [39], whilst Brønsted sites can better handle FFA impurities by favouring the esterification pathway. For Lewis acidic metal oxides, catalysis can occur via the positively charged metal cation accepting an electron pair from an alcohol to produce a reactive alkoxide intermediate [40]. The presence of Brønsted groups in sulfated metal oxides can instead initiate reaction through protonation of the FFA carbonyl group.…”

Section: Types Of Solid Acidsmentioning

confidence: 99%

The Role of Sulfated Materials for Biodiesel Production from Cheap Raw Materials

2022

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There is an urgent need to reduce global greenhouse gas emissions, yet to date the decarbonization of the transportation industry has been slow and of particular difficulty. While fossil fuel replacements such as biodiesel may aid the transition to a less polluting society, production at the industrial scales required is currently heavily dependent on chemical catalysis. Conventional two-step homogenous routes require the challenging separation of catalyst from the obtained product; however, heterogenous solid catalysts bring new considerations such as material stability, surface area, porosity, deactivation effects, and reduced reactivities under mild conditions. Nanomaterials present an attractive solution, offering the high reactivity of homogenous catalysts without complex recyclability issues. Slightly less reactive, acidic sulfated nanomaterials may also demonstrate greater stability to feedstock impurity, extending lifetime and improved versatility to a range of starting feeds. There remains, however, much work to be done in demonstrating the full-scale feasibility of such catalysts. This review explores recent developments over time in acidic sulfated nanocatalysis for biodiesel production, with particular focus on metal oxides, magnetic nanoparticles, silica-supported nanomaterials, and acidic carbon nanocatalysts. Included are various summaries of current progress in the literature, as well as recommendations for future research.

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“…Both cationic and anionic dyes can be removed efficiently from water by this superparamagnetic nanoadsorbent (Tian et al 2018;Hoijang et al 2020;Uddin et al 2021). Magnesium ferrite is considered as a multifunctional nanomaterial having catalytic activity along with the adsorption capacity (Zhu and Chen 2003;Ilhan et al 2015;Fan et al 2016;Aslibeiki et al 2017;Kirchberg et al 2017;Wang et al 2018;Ashok et al 2021). According to Liu et al (2020), the presence of acid-base functional sites in magnesium ferrite nanomaterial plays a promising role in catalysis for oxidative dehydrogenation.…”

Section: Removal Of Organic Pollutantsmentioning

confidence: 99%

Adsorptive removal of pollutants from water using magnesium ferrite nanoadsorbent: a promising future material for water purification

Uddin

Jeong

2021

Environ Sci Pollut Res

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Nanoadsorbents having large specific surface area, high pore volume with tunable pore size, affordability and easy magnetic separation gained much popularity in recent time. Iron-based nanoadsorbents showed higher adsorption capacity for different pollutant removal from water among other periodic elements. Spinel ferrite nanomaterials among iron-bearing adsorbent class performed better than single iron oxide and hydroxides due to their large surface area, mesoporous pore, high pore volume and stability. This work aimed at focusing on water treatment using magnesium ferrite (MgFe 2 O 4 ) nanomaterials. Synthesis routes, properties and pollutant adsorption were critically investigated to explore the performance of magnesium ferrite in water treatment. Structural and surface properties were greatly affected by the factors involved in different synthesis routes and iron and magnesium ratio. Complete removal of pollutants through adsorption was achieved using magnesium ferrite. Pollutant adsorption capacity of MgFe 2 O 4 and its modified forms was found several folds higher than Fe 2 O 3 and Fe 3 O 4 nanomaterials. In addition, MgFe 2 O 4 showed strong stability in water than other pure iron oxide and hydroxide. Modification with graphene oxide, activated carbon, biochar and silica was demonstrated to be beneficial for enhanced adsorption capacity. Complex formation was suggested as a dominant mechanism for pollutant adsorption. These nanomaterials could be a viable and competitive adsorbent for diverse pollutant removal from water.

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Magnetically recoverable Mg substituted zinc ferrite nanocatalyst for biodiesel production: Process optimization, kinetic and thermodynamic analysis

Cited by 64 publications

References 38 publications

Biodiesel production on bench scale from different sources of waste oils by using NiZn magnetic heterogeneous nanocatalyst

Biodiesel production on bench scale from different sources of waste oils by using NiZn magnetic heterogeneous nanocatalyst

The Role of Sulfated Materials for Biodiesel Production from Cheap Raw Materials

Adsorptive removal of pollutants from water using magnesium ferrite nanoadsorbent: a promising future material for water purification

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