Predictive models for characterizing the atomization process in pyrolysis of methyl ricinoleate

Mao, Xiaoning; Xie, Qinglong; Duan, Ying; Yu, Shangzhi; Liang, Xifeng; Wu, Ziyan; Lu, Meizhen; Nie, Yong

doi:10.1016/j.cjche.2020.02.007

Cited by 10 publications

(7 citation statements)

References 17 publications

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“…Within this range, the bubble terminal velocity is almost unchanged at the value of 0.25 m/s. [36,37] So, even if the variation of bubble size is considered, the predicted flow field in the gas-liquid stirred tank changes slightly. [37,38] Table 3 lists the simulated gas induction flow rate and power consumption with different prescribed average bubble sizes.…”

Section: Effect Of Prescribed Average Bubble Size On Simulation Resultsmentioning

confidence: 99%

“…[36,37] So, even if the variation of bubble size is considered, the predicted flow field in the gas-liquid stirred tank changes slightly. [37,38] Table 3 lists the simulated gas induction flow rate and power consumption with different prescribed average bubble sizes. In general, the effect of prescribed average bubble size on the simulation results is not within the scope of our study.…”

Section: Effect Of Prescribed Average Bubble Size On Simulation Resultsmentioning

confidence: 99%

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CFD simulation of hydrodynamics characteristics in a tank stirred by a hollow self‐inducing impeller

Chen²,

Ke-feng

et al. 2018

Can J Chem Eng

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Hollow self-inducing impellers are often used in gas-liquid stirred tanks in many industrial processes. To understand the hydrodynamics characteristics of this type of stirred tank under aerated and unaerated conditions, a computational fluid dynamics (CFD) simulation study was conducted. The predicted gas self-inducing flow rate, power consumption, and impeller power number were compared with the experimental data in the literature and discussed. Under unaerated conditions, liquid level in the hollow shaft relies on the impeller speed, and is slightly influenced by the impeller clearance. Self-inducing impeller power number remains almost unchanged with impeller speed, while increasing with the rise of the impeller clearance. Under aerated conditions, gas is easy to accumulate in the centre of the upper and lower circulation loops. Gas self-inducing flow rate, global gas holdup, and power consumption increase with higher impeller speed. The critical impeller speed for gas self-induction decreases with higher impeller clearance. At the same impeller speed, gas self-inducing flow rate and global gas holdup increase, while power consumption reduces with increasing of impeller clearance.

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Section: Effect Of Prescribed Average Bubble Size On Simulation Resultsmentioning

confidence: 99%

Section: Effect Of Prescribed Average Bubble Size On Simulation Resultsmentioning

confidence: 99%

CFD simulation of hydrodynamics characteristics in a tank stirred by a hollow self‐inducing impeller

Chen²,

Ke-feng

et al. 2018

Can J Chem Eng

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“…88 ricinoleate. 98 The group also studied the heat transfer in microwave irradiated pyrolysis with the help of 3-D simulation. The purpose of the study was to analyze the distribution of temperature of the Methyl ricinoleate droplets and the SiC bed within the cavity of the microwave.…”

Section: Undecylenic Acidmentioning

confidence: 99%

A comprehensive review of castor oil‐derived renewable and sustainable industrial products

Singh

Sharma

Sarma

et al. 2022

Env Prog and Sustain Energy

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Castor oil is one important raw material that could serve as a renewable feedstock for industries in the age of exhausting fossil fuels. The chemical composition of oil and the structure of hydroxyl fatty acid are responsible for its unique physicochemical properties. The oil has diverse applications from pharmaceuticals to polyamides, from the manufacturing of ski boots to durable frames, and from lubricants to laxatives. The present review gives an insight into the physicochemical properties of castor oil and its application. The oil is used for the production of a great variety of its derivatives. Out of many derivatives of castor oil, four are produced and utilized at a larger scale. The names of the four derivates are ricinoleic acid, sebacic acid, undecylenic acid, and γ-decalactone. The review will aim toward an insight into the evolved techniques for the manufacturing of these derivatives of castor oil, the biotechnological route of production, and metabolic engineering approaches. Though the industrial significance of castor oil and its derivatives had been known for ages, methods for their production are continuously changing.

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“…Among these, spray temperature mainly influence the physical properties of the spray medium. Here, the Reynolds number and the Ohnesorge number were used to describe the spray flow rate and properties of the spray medium [12].…”

Section: Dimensionless Correlation Of Smdmentioning

confidence: 99%

“…The small droplet diameter lead to large heat exchange area between the droplets and high-temperature surface, and hence improving the heating speed and uniformity of the feedstock. In addition, droplet diameter models were developed for characterizing the atomization process using methyl ricinoleate as the spray medium [12]. Since the droplet diameter of feedstock would influence the heat transfer which then has significant effect on the high-temperature pyrolysis, it is necessary to explore the heat transfer between the atomized feedstock and the high-temperature bed surface.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer in a novel microwave heating device coupled with atomization feeding

Xie

Mao

et al. 2022

THERM SCI

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The heat transfer characteristics of the microwave heating coupled with atomization feeding were investigated using ethanol as the spray medium on a pressure swirl nozzle. The effects of spray height, flow rate and temperature on the sauter mean diameter (SMD) of atomized droplets were examined. The results showed that the droplet SMD was 12-130 ?m, which increased with the spray height and decreased with the flow rate and temperature of spray medium. Through the fitting of the experimental data, the dimensionless correlation of the droplet SMD which was based on orifice diameter, Reynolds and Ohnesorge numbers was obtained. The calculated results were basically consistent with the experimental data within 15% error. The heat transfer characteristics of atomized droplets on high-temperature surface of SiC bed heated by microwave were then investigated. The effects of spray flow rate, spray height and spray temperature on the heat transfer characteristics were examined. The power of spray heat transfer decreased with the temperature and increased with the spray flow rate and spray height. The dimensionless correlation to describe the heat transfer characteristics of atomized droplets on the high-temperature SiC surface under the microwave heating was obtained which included thermophysical properties of spray medium, spray parameters, and temperatures of the high-temperature bed surface and spray medium, with the error of ?20%. These correlations can be used to predict the SMD of the atomized droplets and the power of spray heat transfer in the microwave heating process.

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Predictive models for characterizing the atomization process in pyrolysis of methyl ricinoleate

Cited by 10 publications

References 17 publications

CFD simulation of hydrodynamics characteristics in a tank stirred by a hollow self‐inducing impeller

CFD simulation of hydrodynamics characteristics in a tank stirred by a hollow self‐inducing impeller

A comprehensive review of castor oil‐derived renewable and sustainable industrial products

Heat transfer in a novel microwave heating device coupled with atomization feeding

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