Experimental determination of thermodynamic properties of terpene and aromatic ketones by gas chromatography

Fonseca, Luciana Aparecida Andrade Previato; Sartoratto, Adilson; Cremasco, Marco Aurélio

doi:10.1016/j.molliq.2020.114531

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…The applied temperature of 140 °C during the first stage ( P = 666 Pa) removed the most volatile terpenes, leaving the cannabinoids and wax behind. , The pressure-temperature nomograph interactive tool provides an approximate boiling profile of different chemicals under reduced pressures. During the second step, the employed operating conditions cover a broad CBD concentration range of 30–80 wt % (Table ).…”

Section: Resultsmentioning

confidence: 99%

Refining Cannabidiol Using Wiped-Film Molecular Distillation: Experimentation, Process Modeling, and Prediction

Valizadehderakhshan

Kazem‐Rostami

Shahbazi

et al. 2022

Ind. Eng. Chem. Res.

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This work describes the stripping and refining of cannabidiol (CBD) from hemp extracts using a wiped-film molecular distillation (WFMD) system. The process takes place in two stages, where the CBD gets stripped in the first stage and refined in the second stage. The main feed encompassing decarboxylated hemp extracts enters the stripping step at a CBD concentration of about 35.8 wt % and leaves at 48.0 wt %, where the majority of terpenes leave the extracts. In the refining stage, the effects of process conditions, including pressure, evaporation temperature, and condensation temperature, were examined using the response surface methodology (RSM) toward the maximum CBD concentration and recovery. A second-stage recovery of 92.66 wt % was achieved at the concentration of 80.19% by applying a pressure of 40 Pa, an evaporation temperature of 170 °C, and an internal condenser temperature of 20 °C. Analysis of the product showed that a low-pressure operation did not remove tetrahydrocannabinol from the CBD-rich product, thus proving to be an improper choice of WFMD for removing the psychoactive component. It was also found that the pressure reduction and increases in evaporation and condensation temperatures were contributing to higher CBD concentrations, although the condensation temperature had no effect on the recovery amount. The RSM and artificial neural network were further tested to assess their prediction capacity toward the efficiency and process performance. It was found that both models offer satisfying prediction capability, although the RSM had larger margins of error.

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Section: Resultsmentioning

confidence: 99%

Refining Cannabidiol Using Wiped-Film Molecular Distillation: Experimentation, Process Modeling, and Prediction

Valizadehderakhshan

Kazem‐Rostami

Shahbazi

et al. 2022

Ind. Eng. Chem. Res.

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“…The enthalpy of vaporization (Δ H vap /J·mol –1 ) for ß-damascenone at a temperature T /K was obtained from normalΔ H vap = prefix− b 1 + b 2 T in which empirical coefficients b 1 and b 2 were set to −87749.66 and −80.56 …”

Section: Methodsmentioning

confidence: 99%

“…in which empirical coefficients b 1 and b 2 were set to −87749.66 and −80.56. 44 Temperature-dependent heat capacity (C P /J•mol −1 •K −1 ) of liquid ß-damascenone was predicted using the group contribution method proposed by Joback and Reid: 53…”

Section: Methodsmentioning

confidence: 99%

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ß-Damascenone Highly Diluted in Hydroalcoholic Mixtures: Phase Equilibrium Measurements, Thermodynamic Modeling, and Simulation of a Batch Distillation

Zanghelini

Decloux

Vitu

et al. 2022

Ind. Eng. Chem. Res.

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ß-Damascenone is a carotenoid-derived compound that plays a key role in the characteristic aroma of wines and distilled spirits. Despite the valuable contribution of this compound to the flavor quality of alcoholic beverages, little is known about its volatility and its vapor–liquid equilibrium behavior in hydroalcoholic mixtures of different compositions. Such information is essential to be able to choose the right thermodynamic model for ß-damascenone when using a distillation process simulation software to gain a better understanding of the behavior of ß-damascenone during spirit distillation. In this context, this work presents new experimental VLE data for ß-damascenone highly diluted in ethanol + water mixtures. The measurements were carried out in a recirculation ebulliometer operating at 101.3 kPa for ethanol mass fractions between (0.10 and 0.79) g·g–1. Activity coefficient model NRTL was used to correlate the experimental data and binary interaction parameters. The parameters obtained for the NRTL model were employed to simulate a laboratory-scale batch distillation of a model solution of ß-damascenone, ethanol, and water. The simulation results were well fitted to experimental data. This approach can be further extended to other compounds that contribute to the aroma of distilled spirits, and the results can be transferred to simulate larger scale distillations.

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Chromatography

Kaur

Saxena

2023

Handbook of Biomolecules

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Experimental determination of thermodynamic properties of terpene and aromatic ketones by gas chromatography

Cited by 7 publications

References 28 publications

Refining Cannabidiol Using Wiped-Film Molecular Distillation: Experimentation, Process Modeling, and Prediction

Refining Cannabidiol Using Wiped-Film Molecular Distillation: Experimentation, Process Modeling, and Prediction

ß-Damascenone Highly Diluted in Hydroalcoholic Mixtures: Phase Equilibrium Measurements, Thermodynamic Modeling, and Simulation of a Batch Distillation

Chromatography

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