Pyrolysis of methyl ricinoleate by microwave-assisted heating coupled with atomization feeding

Yu, Shangzhi; Duan, Ying; Mao, Xiaoning; Xie, Qinglong; Zeng, Gaoxiang; Lu, Meizhen; Nie, Yong; Ji, Jianbing

doi:10.1016/j.jaap.2018.09.005

Cited by 15 publications

(15 citation statements)

References 18 publications

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“…Pyrolysis is a kind of fast reaction for the production of fine chemicals. The fine chemicals undecylenic acid methyl ester and heptanal can be produced by the pyrolysis of methyl ricinoleate at high temperature [1,2]. The reaction temperature and heating rate of feedstock were the main influencing factors for pyrolysis [2].…”

Section: Introductionmentioning

confidence: 99%

“…The fine chemicals undecylenic acid methyl ester and heptanal can be produced by the pyrolysis of methyl ricinoleate at high temperature [1,2]. The reaction temperature and heating rate of feedstock were the main influencing factors for pyrolysis [2]. Thus, the uniformity and speed of heating the feedstock in a stable high-temperature reaction site become the key to achieve the high yield and selectivity of target products [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…The reaction temperature and heating rate of feedstock were the main influencing factors for pyrolysis [2]. Thus, the uniformity and speed of heating the feedstock in a stable high-temperature reaction site become the key to achieve the high yield and selectivity of target products [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…Fast and uniform heating of feedstock could be achieved through spray heat transfer between the atomized feedstock and surface of SiC bed heated by microwave. Our group developed a microwave-assisted heating system coupled with atomization feeding for methyl ricinoleate pyrolysis, obtaining higher selectivities and yields of target products [1,2,11]. In the atomization feeding process, methyl ricinoleate was broken to small droplets by a atomization nozzle.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Xie

Mao

et al. 2022

THERM SCI

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“…The non-premixing, i.e., the feedstock is directly poured on the heated microwave absorbent bed for pyrolysis reactions is one of methods adopted for microwave pyrolysis [10]. Based on the non-premixing method, our group designed a microwave-assisted reactor coupled with atomization feeding and used it in the pyrolysis of methyl ricinoleate [11][12][13][14]. We have achieved good results in a small-scale microwave reactor and now focus on the device scaleup.…”

Section: Introductionmentioning

confidence: 99%

Temperature distribution of SiC bed surface in a large-scale microwave-assisted pyrolysis reactor

Duan

Xie

et al. 2021

Preprint

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Microwave reactors equipped with microwave absorbent as high-temperature bed are effective for the pyrolysis reactions. The uniformity and stability of temperature distribution on the microwave absorbent bed surface is important to the microwave pyrolysis reactor especially in the large-scale reactor. Herein, the temperature distribution on the SiC microwave absorbent bed in a large-scale microwave pyrolysis reactor without feeding was examined by both infrared thermography and simulation. Considering the economics of using multiple low-power magnetrons in large-scale reactor, the effect of the working magnetrons location on the heating rate of bed surface and the COV of temperature distribution was investigated. The results showed that more uniform and stable temperature distribution of bed surface in the large-scale reactor was obtained when the magnetrons located at the bottom of the reactor were in use. This study provides guidance for the scale-up of microwave-assisted pyrolysis reactor with multiple low-power magnetrons.

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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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Pyrolysis of methyl ricinoleate by microwave-assisted heating coupled with atomization feeding

Cited by 15 publications

References 18 publications

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

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

Temperature distribution of SiC bed surface in a large-scale microwave-assisted pyrolysis reactor

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

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