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How to estimate mass transfer in pectin extraction? 


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To estimate mass transfer in pectin extraction, various factors need to be considered. Factors such as temperature, catalyst, time, esterification degree, and the nature of the pectin play crucial roles. Mass transfer performance can be evaluated using models like the axial diffusion model, which considers operating variables like rotor speed and flow rates of the continuous and dispersed phases. Effective diffusivity can be utilized in equations to predict dispersed phase overall mass transfer coefficients accurately. Additionally, utilizing a mass transfer model for extraction in a solid-liquid system can help in understanding the boundary-value problem for the extraction process. By incorporating these aspects and experimental data, it is possible to estimate and enhance mass transfer efficiency in pectin extraction processes.

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The extraction process involves contacting the material with an extracting fluid at elevated pressure to separate the fluid and extract, enabling estimation of mass transfer in pectin extraction.
Not addressed in the paper.
To estimate mass transfer in pectin extraction, use the axial diffusion model in a Kühni extraction column. Consider operating variables like rotor speed and flowrates for accurate overall mass transfer coefficients prediction.
Proceedings ArticleDOI
Yury N. Voloshin, Murat M. Nagoev 
01 Sep 2017
1 Citations
Estimate mass transfer in pectin extraction by modeling a two-dimensional elliptic-hyperboloparabolic equation for solid-liquid systems, as discussed in the paper.
Mass transfer in pectin extraction can be estimated by considering factors like temperature, catalyst, time, and esterification degree, as shown in the factorial design study on pectin extraction methods.

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How does pH affect quality of pectin?5 answersThe quality of pectin is affected by pH. The viscosity of pectin solutions decreases as pH increases from 2.9 to 4.0, with low methoxyl pectin being less sensitive to pH changes from 5.0 to 7.0. pH also plays a role in the dynamics of colonic microbiota, with pH > 7 causing a shift in the abundance of certain species and increased gas formation. pH-induced structural changes occur in kiwi pectin methylesterase, leading to loss of enzyme activity. pH-dependent regulation by pectin methylesterase activity affects pectin structure and cell wall mechanical properties in plant growth and expansion. The efficiency of ultrasound-assisted pectin extraction is highly dependent on pH, with higher yields obtained at more acidic pH values.
What are the resulting from pectin hydrolysis?5 answersPectin hydrolysis results in the production of polygalacturonic acid (pectate) and methanol. It can also lead to the production of pectin-derived oligosaccharides (POS). Additionally, pectin hydrolysis can result in the release of monomeric pectin compounds. The hydrolysis of pectin can be targeted using bacteria secreting chimeric proteins, which can lead to the production of coffee beans with unique and enhanced flavors.
What is the best way to extract pectin from pomegranate peels?5 answersThe best way to extract pectin from pomegranate peels is through acid extraction. In one study, pectin was extracted from pomegranate peel using the acid extraction method, and the optimum conditions for extraction were determined as 468-568 µm for particle size, 82°C for temperature, and 47.5 minutes for extraction time. Another study found that a sequential combination of laccase pretreatment and acid extraction significantly improved the yield and galacturonic acid content of the extracted pectin from pomelo peels. Additionally, the use of a pulsed electric field combined with cellulase was found to be a simple and effective method for extracting pectin from pomelo peel. These studies demonstrate that acid extraction, combined with other techniques such as laccase pretreatment or pulsed electric field treatment, can enhance the extraction of pectin from pomegranate peels.
How can I extract pectin from lemon peels?5 answersTo extract pectin from lemon peels, several methods have been proposed in the literature. One method involves combining extracted pectin from lemon peels with chitosan to synthesize chitosan/pectin cryogels. Another method involves soaking lemon peels in alkaline/acidic water, filtering the substance, adding ethanol, adjusting the pH, and then filtering again to obtain pectin. A different approach suggests adding lemon peels to a tank with water, soaking them, adding organic acid and mixed salt, treating the mixture, separating it through centrifugal equipment, and vacuum concentrating the liquid to obtain pectin concentrated liquid. Additionally, a pretreatment method involves smashing lemon peels, adding water, carrying out enzymatic hydrolysis, separating the lemon peel pomace particles, extruding them, and drying the extruded block. Lastly, an aqueous two-phase extraction method using potassium carbonate, ethanol, water, and passion peel extract at room temperature has been reported to maximize pectin yield from passion fruit peel.

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