Effects of microwave/HAc–H2O2 desulfurization on properties of Gedui high-sulfur coal

Yang, Yancheng; Tao, Xiuxiang; Kang, Xiaobing; He, Huan; Xu, Ning; Tang, Longfei; Luo, Laiqin

doi:10.1016/j.fuproc.2015.11.023

Cited by 47 publications

(14 citation statements)

References 33 publications

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“…Additionally, H2O2 is the most common oxidant in catalytic oxidative desulfurization technologies. However, the reduction product H2O of H2O2 causes a two-phase mass transfer problem in the reaction system, and further damages oil quality [15,16]. In addition, the expensive H2O2 results in the catalysts having a significant cost in large-scale application.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, the phthalocyanine complexes MPcR4 (MPcR4, M = Mn 2+ , Fe 2+ , Co 2+ , Ni 2+ , Cu 2+ , Zn 2+ ; R = -H, -COOH, -NH2, -NO2, Figure 2) were selected as desulfurization catalysts, the O2 molecule was used as the oxidant, dibenzothiophene (DBT) simulated sulfurcontaining pollutants, and a biomimetic catalytic system was performed to study the influence of MN4-type coordination structure in metallophthalocyanines for the Additionally, H 2 O 2 is the most common oxidant in catalytic oxidative desulfurization technologies. However, the reduction product H 2 O of H 2 O 2 causes a two-phase mass transfer problem in the reaction system, and further damages oil quality [15,16]. In addition, the expensive H 2 O 2 results in the catalysts having a significant cost in large-scale application.…”

Section: Introductionmentioning

confidence: 99%

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Effects of MN4-Type Coordination Structure in Metallophthalocyanine for Bio-Inspired Oxidative Desulfurization Performance

et al. 2022

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Oxidative desulfurization (ODS) is the promising new method for super deep desulfurization of fuel oil. The oxidative desulfurization performance of the metal-N4-chelates metallophthalocyanines (MPcs) is related to the chemical properties of conjugate structures and the central metal ions. Herein, a biomimetic catalytic system composed of metallophthalocyanines (MPcR4, M = Mn(II), Fe(II), Co(II), Ni(II), Cu(II), Zn(II); R = -H, -COOH, -NO2, -NH2) and molecular O2 was performed to study the influence of MN4-type coordination structure in metallophthalocyanines for the degradation of dibenzothiophene (DBT) in model oil containing n-octane. The results reveal that the conjugate structures and the center metal ions of metallophthalocyanines played key roles in oxidative desulfurization performance. The inductive effect of different R substituents strongly affected the electron cloud distribution of the conjugate structures and the catalytic performance. Moreover, the catalytic activity of MPcs, which is related to the d electronic configuration and ligand-field effects, does not sequentially increase with the increase in the d electron number of central metal ions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of MN4-Type Coordination Structure in Metallophthalocyanine for Bio-Inspired Oxidative Desulfurization Performance

et al. 2022

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“…Yang indicated that after microwave desulfurization, the basic macromolecular structure of coal remained unchanged, the concentration of oxygen-containing functional groups, mainly the carboxyl group increased. The more oxygen coal contains, the easier it is to burn or achieve its ignition [18].…”

Section: Introductionmentioning

confidence: 99%

Effect on Combustion Properties of Coal Treated by Microwave Irradiation Combined with Sodium Hydroxide Solution

et al. 2021

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A Kentucky coal sample treated by microwave irradiation (MI) combined with sodium hydroxide solution was performed using a thermo-gravimetric analyzer (TGA) coupled to a Fourier transform infrared spectrometer (FTIR). The combustion properties and structural changes of coal under different conditions were investigated and compared. The results show that the desulfurization efficiency of coal samples increases with the increase of sodium hydroxide solution concentration. Microwave irradiation can significantly improve the desulfurization efficiency. The whole combustion process of the treated coal sample becomes longer; the combustion performance becomes worse. The total mass loss of coal treated samples is significantly reduced, and the temperature corresponding to the maximum weight loss rate decreases with the increase of sodium hydroxide concentration. The infrared spectra of the coal samples treated with microwave and 5% sodium hydroxide solution were basically unchanged, while the O containing groups and aromatic C-H groups increased in the coal samples treated with 20% sodium hydroxide solution.

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“…Different from a previous study of coal microwave desulfurization process by adding oxidation or reduction additives to assist microwave radiation, 21–24 the aim of this research is to explore the mechanism of organic sulfur removal from coal under microwave irradiation by investigating the dielectric properties of organic sulfur compounds with different structures and the relationships between which and microwave frequencies. Based on this, to clarify the ease of removal various organic sulfur components by selecting organic sulfur compounds with different structures and then testing its permittivity, calculating loss tangent, microwave penetration depth, and absorption index.…”

Section: Introductionmentioning

confidence: 99%

Influence of dielectric property of organic sulfur compounds on coal microwave desulfurization

Tao

Yang

2020

Asia-Pacific J Chem Eng

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The present study aims to reveal the influence mechanism of organic sulfur structures and microwave frequency on its dielectric property and establish the relationship between the dielectric properties of organic sulfur components in coal and the efficiency of microwave desulfurization. Results showed that the different polarization mechanisms of organic sulfur compounds lead to the real part of complex permittivity decreased initially and then increased with increasing frequency. At the same time, the real parts of the complex permittivity of mercaptan and thioether compounds were higher than that of thiophene, which were caused by their different structures. As the frequency increased, the loss tangent, microwave penetration depth, and absorption index showed decline in oscillation. The loss tangent was mainly related to the polarization mechanism; both polarization mechanism and microwave wavelength had effect on the changes of microwave penetration depth and absorption index. Mercaptan and thioether compounds were more effective at converting microwave energy into heat energy. After microwave processing, the relative content of mercaptan (thioether) in GZ, CQ, and SX coals decreased from 37.38%, 36.93%, and 40.02% to 27.34%, 29.26%, and 26.67% and of thiophene increased from 47.61%, 53.35%, and 49.54% to 58.76%, 59.09%, and 60.38%.

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Effects of microwave/HAc–H2O2 desulfurization on properties of Gedui high-sulfur coal

Cited by 47 publications

References 33 publications

Effects of MN4-Type Coordination Structure in Metallophthalocyanine for Bio-Inspired Oxidative Desulfurization Performance

Effects of MN4-Type Coordination Structure in Metallophthalocyanine for Bio-Inspired Oxidative Desulfurization Performance

Effect on Combustion Properties of Coal Treated by Microwave Irradiation Combined with Sodium Hydroxide Solution

Influence of dielectric property of organic sulfur compounds on coal microwave desulfurization

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