Production of renewable aromatics from jatropha oil over multifunctional ZnCo/ZSM-5 catalysts

Singh, Omvir; Agrawal, Ankit; Dhiman, Neha; Vempatapu, Bhanu Prasad; Chiang, Kin Seng; Shailendra, Tripathi; Sarkar, Bipul

doi:10.1016/j.renene.2021.08.011

Cited by 12 publications

(16 citation statements)

References 37 publications

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“…It is well known that aromatization of OAME over HZSM-5 zeolites is a very complex process. Generally, the conversion of OAME first undergoes cracking and deoxygenation reactions simultaneously or sequentially to form alkanes and alkenes. , Subsequently, the following reactions including oligomerization, cracking, isomerization, cyclization, and hydrogen transfer occur, and then, the light hydrocarbons are finally converted into aromatics …”

Section: Resultsmentioning

confidence: 99%

“…As shown in Scheme , the following steps can be assumed during the aromatization of OAME. First, protolytic cracking of OAME is believed to happen over the B acid sites of the Zn/HZSM-5(25) catalysts, forming oleic acid and methane . Then, long-chain oleic acid further undergoes deoxygenation and cracking reactions simultaneously or sequentially on the outer surface of the catalyst due to the molecular size restrictions in the pore network of the catalysts.…”

Section: Resultsmentioning

confidence: 99%

“…Generally, the conversion of OAME first undergoes cracking and deoxygenation reactions simultaneously or sequentially to form alkanes and alkenes. 30,60 Subsequently, the following reactions including oligomerization, cracking, isomerization, cyclization, and hydrogen transfer occur, and then, the light hydrocarbons are finally converted into aromatics. 1 As can be seen in Figure 3a, the conversions were always 100% for all catalysts and the OAME was mainly converted into the gas product and OLP.…”

Section: Resultsmentioning

confidence: 99%

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Catalytic Cracking of Fatty Acid Methyl Esters for the Production of Green Aromatics Using Zn-Modified HZSM-5 Catalysts

Zhang

et al. 2022

Energy Fuels

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Catalytic cracking of fatty acid methyl esters (biodiesel) is an attractive alternative to petroleum processing to produce valuable and versatile aromatics over the Zn-modified HZSM-5(25) catalysts. The catalysts with a Zn loading amount of 0–2.6 wt % were prepared and characterized. The introduction of Zn species presented great effects on the textural property and acidity of the parent HZSM-5(25) zeolite, and the chemical state of Zn species was heavily dependent on the amount of Zn loading. The strong Brönsted acid sites on the 0.5% Zn/HZSM-5(25) catalyst were exchanged by Zn species and formed new Zn-Lewis acid sites, which were identified as [ZnOH]+ and Zn2+ species. These Zn species greatly enhanced the dehydrogenation activation of alkanes to form more alkenes. Besides, they also promoted the further dehydrogenation reactions during aromatization of alkenes, thus improving the formation of H2 (>4 wt %) and increasing the production of aromatics (>40 wt %). The dominant components in the organic liquid product were monocyclic aromatics including benzene, toluene, and xylenes. Moreover, the 0.5% Zn/HZSM-5(25) catalyst exhibited an excellent stability, adaptability, and regeneration.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Catalytic Cracking of Fatty Acid Methyl Esters for the Production of Green Aromatics Using Zn-Modified HZSM-5 Catalysts

Zhang

et al. 2022

Energy Fuels

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“…A simplified summary of the reaction pathways for the observed relativities is presented in Figure 9 . 33 , 40 , 77 , 78 …”

Section: Results and Discussionmentioning

confidence: 99%

“… 39 The transformation of jatropha oil into aromatics using a bimetallic ZSM-5 catalyst was investigated in a continuous downflow reactor; the 10Zn5Co5Ce/ZSM-5 catalyst showed an 87.6% oil conversion with 81.9% total aromatics. 40 These results provide a practical way to prepare catalysts with a high catalytic performance in biomass-derived oil aromatization.…”

Section: Introductionmentioning

confidence: 89%

Catalytic Pyrolysis of Nonedible Oils for the Production of Renewable Aromatics Using Metal-Modified HZSM-5 Catalysts

Liu

Zhang

et al. 2022

ACS Omega

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Catalytic pyrolysis of triglycerides to aromatics over zeolites is an advanced technology for a high value-added utilization of renewable biomass resources. Therefore, in this research, the catalytic performance of M/HZSM-5 catalysts (M = Zn, Ga, In, Ni, and Mo) during the pyrolysis process of glycerol trioleate and the effect of the compositional difference of several woody oils and waste oils on aromatic formation were investigated. Results revealed that Zn/HZSM-5 with appropriate acidity and metal sites reached the maximum aromatics yield (56.13%) and significantly enhanced the catalytic stability. In addition, these renewable nonedible oils were effectively converted to aromatics over the Zn/HZSM-5 catalyst, the aromatic yield of jatropha oil reached up to 50.33%, and the unsaturation and double bond number of feedstocks were crucial for the production of aromatics. The utilization of biomass resources to produce high value-added aromatics can alleviate the problems caused by the shortage of fossil resources and achieve sustainable green development.

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Production of acrylic acid from Bio-Derived lactic acid over a Defect-Rich molybdenum phosphosulfide catalyst

Dhiman

Yenumala

Agrawal

et al. 2023

Chemical Engineering Journal

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Production of renewable aromatics from jatropha oil over multifunctional ZnCo/ZSM-5 catalysts

Cited by 12 publications

References 37 publications

Catalytic Cracking of Fatty Acid Methyl Esters for the Production of Green Aromatics Using Zn-Modified HZSM-5 Catalysts

Catalytic Cracking of Fatty Acid Methyl Esters for the Production of Green Aromatics Using Zn-Modified HZSM-5 Catalysts

Catalytic Pyrolysis of Nonedible Oils for the Production of Renewable Aromatics Using Metal-Modified HZSM-5 Catalysts

Production of acrylic acid from Bio-Derived lactic acid over a Defect-Rich molybdenum phosphosulfide catalyst

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