Assessment of biodiesel purification using CO2 at high pressures

Escorsim, Alexis Miguel; Cordeiro, Claudiney Soares; Ramos, Luiz Pereira; Ndiaye, Papa M.; Kanda, Luis Ricardo Shigueyuki; Corazza, Marcos L.

doi:10.1016/j.supflu.2014.08.013

Cited by 17 publications

(6 citation statements)

References 30 publications

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“…Its critical point is much lower than water's, in the 31°C and 7.4 MPa range (versus 374°C and 22.1 MPa), so less heating and pressurization energy are required to make CO2 supercritical. It has been used for relevant pretreatments (Phan and Tan 2014), extraction of fatty acids and other valuable components from salient waste streams (Morais et al 2014;Adeoti and Hawboldt 2015;Schievano et al 2015), and fuel upgrading and cleanup (Earley et al 2015;Escorsim et al 2015). Though not necessarily a top priority, there seem to be enough possibilities to merit further exploration.…”

Section: Alternative Solventsmentioning

confidence: 99%

Biofuels and Bioproducts from Wet and Gaseous Waste Streams: Challenges and Opportunities

None¹

2017

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Historically, the concept of "waste-to-energy" has referred to any of a number of highly mature technologies (e.g. incineration or anaerobic digestion) that decrease waste volumes. Landfill capacity scarcity, coupled with increasingly stringent disposal regulations, is necessitating novel waste management solutions. In particular, the notion that waste streams represent valuable feedstocks for the production of biofuels and bioproducts is gaining currency. These feedstocks include inedible fats and greases, biogas from landfills, dairies, wastewater treatment plants, and the organic fraction of municipal solid wastes. Conversion of these feedstocks into renewable natural gas, diesel, and aviation fuels is just beginning to gain market traction. It represents a significant opportunity for additional expansion.Terrestrial feedstocks are currently the largest resource generated for the bioeconomy, estimated at 572 million dry tons for 2017 (Billion Ton 2016), and have traditionally constituted the primary focus of the Bioenergy Technologies Office (BETO). However, the resource assessment conducted by the National Renewable Energy Lab and Pacific Northwest National Lab indicates that wet waste feedstocks (Summarized in Table ES-1) could also make significant contributions to the bioeconomy and domestic energy security goals.

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Section: Alternative Solventsmentioning

confidence: 99%

Biofuels and Bioproducts from Wet and Gaseous Waste Streams: Challenges and Opportunities

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2017

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“…They also found a correlation between the type of resin with the purified biodiesel. Escorsim et al [8] used pressurized CO2 (6)(7)(8)(9)(10)(11)(12) to adsorb impurities in biodiesel for purification purposes at 298-323K. Even though this method resulted in purity biodiesel (higher than 90%), but this method requires a very high amount of CO2, which is 50% of the total weight of crude biodiesel.…”

Section: Introductionmentioning

confidence: 99%

Modification of Nano Hybrid Pes-Zno Membrane Using Uv Irradiation for Biodiesel Purification

et al. 2020

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The purification of biodiesel is one of the crucial processes involved in biodiesel production. This study aims to examine the effect of the polymer composition, nano-ZnO loading, and UV irradiation on the performance of membranes for biodiesel purification. The membranes were fabricated with the polyethersulfone composition of 17, 18, and 20 wt%. The compositions of nano ZnO were varied at 1.5, 2, and 2.5 wt%, while the duration of UV irradiation was varied for 0.5, 1, and 1.5 minutes. The results indicate that the compositions of PES, nano ZnO, and UV irradiation affected the performance of the membrane. The best membrane performance was achieved when the membrane was produced using PES 17 wt%, nano ZnO 1.5 wt% involving irradiation UV light for 1 minute. The fabricated membrane exhibits 3 hours flux profile stability and 61.5% glycerol rejection.

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“…As a greener alternative to organic solvents, supercritical fluids have received considerable attention in the synthesis of geranyl esters. − Supercritical fluids can be used to boost phase separation and ester purification in downstream processes of ester production while providing products without contaminants. As another advantage, the gaslike transport properties and liquidlike densities of supercritical fluids can be readily shaped by changing the process conditions, such as temperature and pressure. , …”

Section: Introductionmentioning

confidence: 99%

“…As another advantage, the gaslike transport properties and liquidlike densities of supercritical fluids can be readily shaped by changing the process conditions, such as temperature and pressure. 26,27 Among supercritical fluids, supercritical CO 2 (scCO 2 ) is primarily used due to its desirable characteristics such as nontoxicity, nonflammability, inertness, abundance, low cost, relative ease to achieve critical points, and tunable physicochemical and thermodynamic properties. 19,26,28 Although research in the synthesis of geranyl acetate has been reported recently, there is a lack of thermodynamic data regarding the phase equilibrium of the reaction substrates and CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Phase-Equilibrium Measurements and Thermodynamic Modeling of CO₂ + Geraniol, CO₂ + Geraniol + Acetic Acid, and CO₂ + Geraniol + Ethyl Acetate

et al. 2020

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This work reports the phase-equilibrium measurements and thermodynamic modeling for the binary system CO2 + geraniol, and two ternary systems comprising these components and ethyl acetate or acetic acid, which are related to geraniol (trans)esterification using supercritical CO2 as a solvent. Measurements at each composition were carried out in a high-pressure variable-volume view cell at temperatures ranging from 303.2 to 343.2 K. The CO2 molar fraction ranged from 0.4120 to 0.9325 in the CO2 + geraniol system, from 0.5526 to 0.8000 in the CO2 + geraniol + acetic acid system, and from 0.6011 to 0.8993 in the CO2 + geraniol + ethyl acetate system. Under these conditions, vapor–liquid (VL), liquid–liquid (LL), and vapor–liquid–liquid (VLL) phase transitions were detected. The experimental data were modeled with the Peng–Robinson cubic equation of state with the van der Waals (vdW2) quadratic mixing rule.

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Assessment of biodiesel purification using CO2 at high pressures

Cited by 17 publications

References 30 publications

Biofuels and Bioproducts from Wet and Gaseous Waste Streams: Challenges and Opportunities

Biofuels and Bioproducts from Wet and Gaseous Waste Streams: Challenges and Opportunities

Modification of Nano Hybrid Pes-Zno Membrane Using Uv Irradiation for Biodiesel Purification

Phase-Equilibrium Measurements and Thermodynamic Modeling of CO₂ + Geraniol, CO₂ + Geraniol + Acetic Acid, and CO₂ + Geraniol + Ethyl Acetate

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Assessment of biodiesel purification using CO2 at high pressures

Cited by 17 publications

References 30 publications

Biofuels and Bioproducts from Wet and Gaseous Waste Streams: Challenges and Opportunities

Biofuels and Bioproducts from Wet and Gaseous Waste Streams: Challenges and Opportunities

Modification of Nano Hybrid Pes-Zno Membrane Using Uv Irradiation for Biodiesel Purification

Phase-Equilibrium Measurements and Thermodynamic Modeling of CO2 + Geraniol, CO2 + Geraniol + Acetic Acid, and CO2 + Geraniol + Ethyl Acetate

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Product

Resources

About

Phase-Equilibrium Measurements and Thermodynamic Modeling of CO₂ + Geraniol, CO₂ + Geraniol + Acetic Acid, and CO₂ + Geraniol + Ethyl Acetate