Dataset Information

A Non-catalytic Deep Desulphurization Process using Hydrodynamic Cavitation.

ABSTRACT: A novel approach is developed for desulphurization of fuels or organics without use of catalyst. In this process, organic and aqueous phases are mixed in a predefined manner under ambient conditions and passed through a cavitating device. Vapor cavities formed in the cavitating device are then collapsed which generate (in-situ) oxidizing species which react with the sulphur moiety resulting in the removal of sulphur from the organic phase. In this work, vortex diode was used as a cavitating device. Three organic solvents (n-octane, toluene and n-octanol) containing known amount of a model sulphur compound (thiophene) up to initial concentrations of 500?ppm were used to verify the proposed method. A very high removal of sulphur content to the extent of 100% was demonstrated. The nature of organic phase and the ratio of aqueous to organic phase were found to be the most important process parameters. The results were also verified and substantiated using commercial diesel as a solvent. The developed process has great potential for deep of various organics, in general, and for transportation fuels, in particular.

SUBMITTER: Suryawanshi NB

PROVIDER: S-EPMC5015108 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature

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A Non-catalytic Deep Desulphurization Process using Hydrodynamic Cavitation.

Suryawanshi Nalinee B NB Bhandari Vinay M VM Sorokhaibam Laxmi Gayatri LG Ranade Vivek V VV

Scientific reports 20160908

A novel approach is developed for desulphurization of fuels or organics without use of catalyst. In this process, organic and aqueous phases are mixed in a predefined manner under ambient conditions and passed through a cavitating device. Vapor cavities formed in the cavitating device are then collapsed which generate (in-situ) oxidizing species which react with the sulphur moiety resulting in the removal of sulphur from the organic phase. In this work, vortex diode was used as a cavitating devi ...[more]

PMID: 27605492

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Project description:Highlights • Vortex based hydrodynamic cavitation was shown to enhance rate of extraction from macroalgae by an order of magnitude.• Per-pass extraction factor was found to be proportional to the mass fraction of product in macroalgae.• Pressure drop of 200 kPa was found to exhibit maximum rate of extraction within the considered range (50–300 kPa)• Energetic productivity (kg of product/kJ) was found to decrease steeply with increase in number of passes beyond 100. Macroalgae have a tremendous potential to become an important renewable resource for valuable biomolecules and chemicals. New and improved ways of cell disruption and of enhancing rate as well as yield of extraction of valuable products from macroalgae are needed to fully realise this potential. In this work, hydrodynamic cavitation (HC) was used for intensifying rate and yield of extraction of phycoerythrin, proteins and carbohydrates from marine macroalgae Palmaria palmata. We use vortex-based HC devices which do not use small restrictions like orifice-based HC devices or moving parts like rotor–stator based HC devices. A bench scale setup with a nominal slurry flow rate of 20 LPM was established. Dried and powdered macroalgae was used. Influence of key operating parameters like pressure drop and number of passes on extraction performance (the rate and yield) was measured. A simple, yet effective model was developed and used for interpreting and describing experimental data. The results indicate that there exists an optimum pressure drop across the device at which extraction performance is maximum. The extraction performance with HC was found to be significantly better than the stirred vessels. HC has resulted in 2 to 20 times improvement in the rate of extraction of phycoerythrin (R-PE), proteins and carbohydrates. Based on the results obtained in this work, pressure drop of 200 kPa and number of passes through the HC devices of about 100 were found to be most effective for HC-assisted intensified extraction from macroalgae. The presented results and model will be useful for harnessing vortex-based HC devices for intensifying the extraction of valuable products from macroalgae.

Dataset Information

A Non-catalytic Deep Desulphurization Process using Hydrodynamic Cavitation.

Publications

A Non-catalytic Deep Desulphurization Process using Hydrodynamic Cavitation.

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