Overview of Catalytic Methods for Production of Next Generation Biodiesel from Natural Oils and Fats
Key words: fine crystalline corundum, manganese doped corundum, supercritical water fluid, solid phase transformation
Production of biodiesel from natural oils and fats can be achieved using various technologies briefly discussed in this review. A particular appealing concept for production of green diesel is selective catalytic deoxygenation of renewables leading to diesel fuel products. This reaction can be performed over Pd on active carbon supports with saturated and unsaturated fatty acids and their derivatives.
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7.0.100-2018
Overview of Catalytic Methods for Production of Next Generation Biodiesel from Natural Oils and Fats / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2009. – Т. 4. – № 1. – С. 3-17. - DOI:
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Obzor kataliticheskih metodov proizvodstva biodizel'nogo topliva iz natural'nyh masel i zhirov / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2009. – Т. 4. – № 1. – S. 3-17. - DOI:
En
Overview of Catalytic Methods for Production of Next Generation Biodiesel from Natural Oils and Fats. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 3-17 (2009). https://doi.org/
Key words: supercritical fluids, chemical and phase equilibria, phase diagrams, critical point, multicomponent mixture, non-ideality, thermophysical behaviors, monoterpenes, a-pinene, heteroazeotrops, mathematical modeling
The mathematical and calculating models were developed to solute the specific research problems on thermodynamics of multicomponent and multiphase mixtures. The features of chemical and phase equilibria were examined both for the ideal-gas approximation and the non-ideality. The conditions of equilibrium phase stability were studied for multi phase systems. The calculation results of specific phase diagrams, binodal and spinodal are demonstrated for the appropriate reaction mixtures. The new interpretation of mathematical model was suggested for the localization of critical point, especially for fixed multicomponent chemical mixtures. The new variation of classical homotopy method was developed for the soluting of complex nonlinear equations systems, which are the princi ples of concerned mathematical models. The some anomalous phase profiles and the critical curves were analyzed to demonstrate the necessity of taking into account the pointed features at the planning of experiments, the reactor parameters calculations. The examples of specific multicomponent non-ideal mixtures indicate the possibility of thermodynamic and thermophysical behaviors calculations (entropy, enthalpy and heat capacity; thermal reaction effect, adiabatic warming up). It was noted that the cubic state equations are quite suitable for the prediction of property deviations from the ideal-gas state and can be used for the prognosis of behavior anomaly at the critical point surrounding.
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7.0.100-2018
Thermodynamics of Multicomponent Reaction Mixtures at Sub- and Supercritical Conditions / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2009. – Т. 4. – № 1. – С. 18-48. - DOI:
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Termodinamika slozhnyh reakcionnyh smesej v dokriticheskom i sverhkriticheskom sostoyaniyah / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2009. – Т. 4. – № 1. – S. 18-48. - DOI:
En
Thermodynamics of Multicomponent Reaction Mixtures at Sub- and Supercritical Conditions. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 18-48 (2009). https://doi.org/
Key words: supercritical fluids, phase behavior, hollow fibers
New method to monitor phase behavior of mixtures at high pressures and temperatures was developed on basis of continuous sampling by use of glass capillary. Such technique gives opportunity not to disturb equilibrium in the system and to get information about phase state in continuous flow systems at different stages of process. As a detector the flame-ionization detector (FID) was chosen due to the fact that our solvents are not flammable and will not give signal. Method was validated using two different setups on systems: water.ethanol and CO2 acetone.
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7.0.100-2018
A New Continuous Method for Monitoring of Phase Behaviour of Complex Mixtures at High Pressures and Temperatures / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2009. – Т. 4. – № 1. – С. 49-56. - DOI:
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Novyj metod nepreryvnogo monitoringa fazovogo povedeniya smesej pri vysokih davleniyah i temperaturah / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2009. – Т. 4. – № 1. – S. 49-56. - DOI:
En
A New Continuous Method for Monitoring of Phase Behaviour of Complex Mixtures at High Pressures and Temperatures. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 49-56 (2009). https://doi.org/
Key words: subcritical carbon dioxide, nanopores, adsorption and condensation in pores, shift of critical point, CARS-probe
Coherent anti-stocks Raman scattering spectra measured in the range of Q-branch of ν1 vibrational transition are used to reveal the state of carbon dioxide in nanopores of Vicor glass. The measurements were carried out in a high pressure optical cell at room (20.5 °C) and subcritical (30.5 °C) temperatures and CO2 pressures up to saturation value Psat for each temperature. In addition to the main spectral component assigned to gaseous CO2 molecules, the second, low frequency component appears in the spectra at pressures close to Psat. This second component is determined by the contribution of CO2 molecules inside pores. Spectral deconvolution taking into account the interference of these two bands allows one to estimate spectral features of the
second (low-frequency) component for each temperature. The bandwidth of lowfrequency component decreases with CO2 pressure at 20.5 °C, which is caused by transition of CO2 from adsorbed stated to condensed state in the pore. At subcritical temperature 30.5 °C the spectral width of the second component is independent of pressure and corresponds to the value measured in free volume at supercritical conditions, which is likely due to the low-temperature shift of critical point in nanopores.
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7.0.100-2018
Spectral Features of Subcritical Carbon Dioxide in Nanopores / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2009. – Т. 4. – № 1. – С. 57-65. - DOI:
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Spektral'nye osobennosti subkriticheskogo dioksida ugleroda v nanoporah / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2009. – Т. 4. – № 1. – S. 57-65. - DOI:
En
Spectral Features of Subcritical Carbon Dioxide in Nanopores. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 57-65 (2009). https://doi.org/
Key words: supercritical fluid extraction, Reynoutria sachalinensis, slow fluorescence induction, thermoluminescence
The effect of supercritical fluid (SF) extracts of giant knotweed Reynoutria sachalinensis on photosynthetic activity of Vicia faba L. bean leaves was studied by slow fluorescence induction (SFI) and thermoluminescence (TL) methods. The treatment of plants with extracts led to the enhancement of their photosynthetic activity. The maximum stimulating effect was observed for extract obtained using carbon dioxide with 2% of ethanol as co-solvent. The observed stimulating effect is assumed to be bound with increasing of carries pool of the photosynthetic electron transport chain of plant leaves by quinonic compounds flux into plant cells.
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7.0.100-2018
Luminescent Characteristics of Vicia faba L. the Bean Leaves Treated with SF-Extracts of Reynoutria sachalinensis / – Текст : непосредственный // Сверхкритические Флюиды: Теория и Практика.. – 2009. – Т. 4. – № 1. – С. 66-77. - DOI:
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Lyuminescentnye pokazateli list'ev bobov Vicia faba L., obrabotannyh SKF-ekstraktami Reynoutria sachalinensis / – Sverhkriticheskie Flyuidy: Teoriya i Praktika.. – 2009. – Т. 4. – № 1. – S. 66-77. - DOI:
En
Luminescent Characteristics of Vicia faba L. the Bean Leaves Treated with SF-Extracts of Reynoutria sachalinensis. Sverhkriticheskie Flyuidy: Teoriya i Praktika, 1, 66-77 (2009). https://doi.org/