Fast pyrolysis of methyl ricinoleate in an inductively heated reactor coupled with atomization feeding

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

doi:10.1016/j.applthermaleng.2021.117093

Cited by 8 publications

(4 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The comparison of UAME and HEP yields obtained from different reactors is displayed in Figure 3. The product yields for the fast pyrolysis reactors The reactors reported for MR pyrolysis include tubular reactors [9,10], microwave heated reactors [13] and inductively heated reactors [11]. Among these, microwave heated and inductively heated reactors were adopted to achieve fast pyrolysis of MR with atomization feeding.…”

Section: Dft Studies On Mr Pyrolysismentioning

confidence: 99%

“…For the conventional tubular reactors, heat is primarily transferred through conduction, and a temperature gradient usually exists within the reactor, which would cause deep pyrolysis and hence a reduction in UAME and HEP yields [9,10]. Our group proposed microwave and inductive heating coupled with atomization feeding reactors for MR pyrolysis [11][12][13]. The spray heat transfer resulted in rapid heating of the MR feedstock and hence an increase in product yields.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Pyrolysis of Methyl Ricinoleate: Distribution and Characteristics of Fast and Slow Pyrolysis Products

et al. 2022

Self Cite

View full text Add to dashboard Cite

A stable temperature site and the speed of heating the feedstocks play a key role in pyrolysis processes. In this study, the product distribution arising from pyrolysis of methyl ricinoleate (MR) at 550 °C with low and high heating rates was first studied by pyrolysis–gas chromatography/mass spectrometry (Py-GC/MS). The results show that fast pyrolysis of MR favored the production of undecylenic acid methyl ester (UAME) and heptanal (HEP). Density functional theory (DFT) calculations were employed to reveal the UAME and HEP formation process from pyrolysis of MR. The bond dissociation energies (BDEs) of C–C bonds in MR showed that the C11–C12 bond is the weakest. This suggests that UAME and HEP are two major products. The process of slow and fast MR pyrolysis was the dehydration-first and the pyrolysis-first trend, respectively. The calculated activation energies of MR pyrolysis to UAME and HEP and MR dehydration to 9,12-octadecadienoic acid methyl ester were 287.72 and 238.29 kJ/mol, respectively. The much higher product yields obtained in the fast pyrolysis reactors than those from conventional tubular reactors confirmed the proposed process.

show abstract

Section: Dft Studies On Mr Pyrolysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pyrolysis of Methyl Ricinoleate: Distribution and Characteristics of Fast and Slow Pyrolysis Products

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…[17][18][19][20] Castor oil and its derivatives play an essential role as a sustainable raw material in the production of value-added chemicals, which are used in various industrial applications such as foods, lubricants, agriculture, plastics and rubber, electronics and telecommunications, cosmetics, perfumeries, biorefineries, and pharmaceutical. [21][22][23] The ricinoleic molecule of castor oil splits from the hydroxyl position when exposed to 525 °C, resulting in the formation of HEP and MU. [16,24,25] Mainly, HEP and MU are essential raw materials used to synthesize and produce valuable organic compounds such as lubricants, cosmetics, pharmaceuticals, and polymeric materials.…”

Section: Introductionmentioning

confidence: 99%

High Yield Synthesis of Green Pyrolytic Oil via Thermal Cracking of Ricinoleic Acid Methyl Ester

Yogesh Dhanuskar,

Modak,

Mhatre

et al. 2023

ChemistrySelect

View full text Add to dashboard Cite

Castor oil has the potential to be a renewable resource for the synthesis of high‐value‐added chemicals. This work focuses on the thermal cracking of ricinoleic acid methyl esters (RAME), the major component of castor oil in a micro fixed bed reactor that was used to produce methyl undecenoate (MU) and heptaldehyde (HEP). MU and HEP have wide applications in polymers, cosmetics, and drug industries. The effect of flow rate, sweeping gas flow rate, preheating and reaction temperatures were examined briefly. Thermal cracking of RAME at a preheating temperature of 350 °C and reaction temperatures of 550 °C, produced high yields of MU and HEP at 46.7 and 27.3 wt.% respectively. The increase in sweep flow rate from 15 ml min−1 to 25 ml min−1 enhanced the production of pyrolytic oil yield to 92.6 wt.%. Density functional theory (DFT) was performed to examine the experimental results and distribution of the products involved in the dissociation of RAME. Assuming C−C bond scission followed by the cleavage of the OH bond, the reaction energy of MU and HEP thermal cracking is computed using DFT. This research may provide an alternative pathway to produce important chemicals from castor oil for upscaling and process development for the industry.

show abstract

“…Heptaldehyde and undecylenic acid can be obtained by the thermal cracking of castor oil, its methyl ester or ricinoleic acid [1,2]. They are among the most important green chemicals obtained from castor oil and are known as vital intermediates for products within medicine, fuels, perfumes, polymers, plastics, rubbers, and flavors, among others [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Green chemical production based on thermal cracking of inedible vegetable oil

Costa

Chiarello

Botton

et al. 2023

CI&CEQ

View full text Add to dashboard Cite

This work evaluated the process for heptaldehyde, undecylenic acid and methyl undecenoate production from castor oil, methyl ester of castor oil and ricinoleic acid. Experiments were performed in a continuous pilot-plant scale pyrolysis reactor. Those are very important green chemical products that might be obtained by the thermal cracking of castor oil. Transesterification of castor oil produces methyl ricinoleate and its thermal cracking generates methyl undecenoate and heptaldehyde. The pyrolysis temperatures tested were 530, 545, 560, and 575 ?C, with residence time from 17 to 32 s and mass flow at 400 g/h of the mixture of materials with 25% distilled water. It was observed that the temperature influence in relation to bio-oil generated and their differences for each material. The bio-oil was characterized by iodine index, acid number, mass, and the contents of its compounds were obtained by GC-FID chromatography. The best result for the undecylenic acid mass yield of the desired compounds occurred at 530?C, achieving 17.8 % from ricinoleic acid and 16.5% from castor oil. For the heptaldehyde the highest production was also obtained at 530 ?C, with a value of 20.7% from methyl ester and 15.2% from ricinoleic acid.

show abstract

Fast pyrolysis of methyl ricinoleate in an inductively heated reactor coupled with atomization feeding

Cited by 8 publications

References 31 publications

Pyrolysis of Methyl Ricinoleate: Distribution and Characteristics of Fast and Slow Pyrolysis Products

Pyrolysis of Methyl Ricinoleate: Distribution and Characteristics of Fast and Slow Pyrolysis Products

High Yield Synthesis of Green Pyrolytic Oil via Thermal Cracking of Ricinoleic Acid Methyl Ester

Green chemical production based on thermal cracking of inedible vegetable oil

Contact Info

Product

Resources

About