Pulsed discharge plasma induced hydrogenation of aromatic compound in heavy oil: Reaction mechanism upon impact by operating conditions

Liu, Yadi; Sun, Haijie; Fan, Zhe; Zhang, Cheng; Shao, Tao

doi:10.1016/j.joei.2022.10.015

Cited by 10 publications

(4 citation statements)

References 54 publications

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“…If the mean electron energy increases further, the aromatic ring would be decomposed into hydrogen and low-carbon hydrocarbons, which are not the desired products for the upgrading of bio-oils. 52 Therefore, the appropriate operating conditions need to be considered, rather than simply increasing the mean electron energy. It is worth noting here that the mean electron energy is not the only parameter influencing product distribution.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The oxygen atom can be effectively removed via Route 2 and Route 3, in which Ar or He is recommended as a carrier gas. If the mean electron energy increases further, the aromatic ring would be decomposed into hydrogen and low-carbon hydrocarbons, which are not the desired products for the upgrading of bio-oils . Therefore, the appropriate operating conditions need to be considered, rather than simply increasing the mean electron energy.…”

Section: Resultsmentioning

confidence: 99%

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Selective Clipping of a Lignin-Derived Monomer by Plasma for Bio-Oil Upgrading

Liu

Dou

Sun

et al. 2022

ACS Sustainable Chem. Eng.

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Oxygen atom removal is the key to improving the heating value and thermal stability of biomass-derived bio-oils. Nonthermal plasma provides a highly promising method for bio-oil upgrading under ambient conditions without catalysts. However, the diversity of products formed in plasma processing makes it necessary to understand the interaction mechanisms and reaction pathways. Here, we present a new approach for selectively clipping a lignin-derived monomer (guaiacol) by nonthermal plasma and propose a product selection mechanism governing the relationship between the product distribution and mean electron energy. Density functional theory calculations and a one-dimensional plasma fluid model show that the gas temperature determines whether the reaction is directed toward aromatic ring hydrogenation or hydrodeoxygenation. Increasing the voltage amplitude or decreasing the pulse rise time increases the mean electron energy, which facilitates removing the oxygenated functional groups. The main products can be adjusted from catechol to cresol and phenol and then to benzene, toluene, and xylene. The work shows the correlation of the product distribution with the mean electron energy and analyzes the underlying reaction pathways, guiding the practical application of plasma-enabled bio-oil conversion.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Selective Clipping of a Lignin-Derived Monomer by Plasma for Bio-Oil Upgrading

Liu

Dou

Sun

et al. 2022

ACS Sustainable Chem. Eng.

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“…Currently, slurry phase hydrogenation catalysts can be categorized into homogeneous (water-soluble and oil-soluble dispersion catalysts) and heterogeneous (solid powder catalysts). [32,33] Among them, metal sulfides (Mo > W > Co > Ni > Fe) exhibited the best performance. [34] However, metal sulfide catalysts tend to agglomerate into nanometer or particles, leading to a reduction of the exposed active sites and the generation of coke.…”

Section: Slurry Phase Hydrogenation Of Heavy Oilmentioning

confidence: 99%

Structural Design of Single‐Atom Catalysts for Enhancing Petrochemical Catalytic Reaction Process

Li,

Sun,

Wang

et al. 2024

Advanced Materials

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Petroleum, as the “lifeblood” of industrial development, is the important energy source and raw material. The selective transformation of petroleum into high‐end chemicals is of great significance, but still exists enormous challenges. Single‐atom catalysts (SACs) with 100% atom utilization and homogeneous active sites, promise a broad application in petrochemical processes. Herein, the research systematically summarizes the recent research progress of SACs in petrochemical catalytic reaction, proposes the role of structural design of SACs in enhancing catalytic performance, elucidates the catalytic reaction mechanisms of SACs in the conversion of petrochemical processes, and reveals the high activity origins of SACs at the atomic scale. Finally, the key challenges are summarized and an outlook on the design, identification of active sites, and the appropriate application of artificial intelligence technology is provided for achieving scale‐up application of SACs in petrochemical process.

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“…At present, plasma-chemical pyrolysis technologies using non-thermal plasma (NTP) in the liquid phase are gaining popularity [14][15]. This technology makes it possible to increase the depth of processing of heavy residues while obtaining expensive target products [16]. Low-temperature non-equilibrium plasma is created under the action of electric discharges.…”

Section: Introductionmentioning

confidence: 99%

Processing of catalytic cracking residues by NTP-pyrolysis

Shirokov,

Bodrikov,

Titov

et al. 2024

Third International Scientific and Practical Symposium on Materials Science and Technology (MST-III 2023)

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The problem of utilisation of heavy oil by-products during oil refining is associated with high content of tarry asphaltene substances, coke, heavy metals and catalyst dust. A promising way to obtain commercial products from cube residues is low-temperature plasma chemical pyrolysis in liquid phase (NTP-plasma). The present work investigates the process characteristics of plasma-chemical pyrolysis of catalytic cracking residues (CCR) at current source voltages of 300- 700 V in order to optimise product composition and energy consumption. The gaseous NTP products of CCR pyrolysis contain (%mol): hydrogen (63.0-65.5), acetylene (21.8-23.6), methane (6.3-7.7), ethylene (2.7-3.4) and C3 - C6 hydrocarbons (1.9-3.7). Solid pyrolysis products are conglomerates of "sticky" particles of rounded shape in the size range from units to tens of microns. The maximum conversion of CCR pyrolysis was 78.9 % wt% at a minimum energy input of 3.3 kWh/kg at 500V.

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Pulsed discharge plasma induced hydrogenation of aromatic compound in heavy oil: Reaction mechanism upon impact by operating conditions

Cited by 10 publications

References 54 publications

Selective Clipping of a Lignin-Derived Monomer by Plasma for Bio-Oil Upgrading

Selective Clipping of a Lignin-Derived Monomer by Plasma for Bio-Oil Upgrading

Structural Design of Single‐Atom Catalysts for Enhancing Petrochemical Catalytic Reaction Process

Processing of catalytic cracking residues by NTP-pyrolysis

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