Dataset Information

Inhibition Effect of Solid Products and DC Breakdown Characteristics of the HFO1234Ze(E)-N₂-O₂ Ternary Gas Mixture.

ABSTRACT: HFO1234ze(E) is an environmentally friendly SF₆ substitute gas with prominent application potential. To suppress the generation of the HFO1234ze(E) solid decomposition products, which may cause great hazards to the gas-solid insulation strength, a gas mixing scheme screening method based on the reactive force field (ReaxFF) molecular dynamics (MD) simulation was innovatively proposed. The simulation results show that the inhibitory effect of O₂ on the formation of HFO1234ze(E) solid products is better than those of CO₂ and CF₄. Further study shows that when O₂ accounts for 3.33% of the gas mixture, the solid precipitate content is reduced by 48%. The experimental study shows that an O₂ content of 3.33% can inhibit the generation of solid products by more than 50%. Besides, compared with HFO1234ze(E)-N₂, the DC breakdown voltage of HFO1234ze(E)-N₂-O₂ is slightly increased, and the breakdown voltage dispersion degree and continuous breakdown voltage drop rate are decreased. This work gives a feasible solution for the suppression of HFO1234ze(E) solid decomposition products and provides an efficient method for solving similar problems of environmentally friendly insulating gas in C/F/O/N systems.

SUBMITTER: Liu H

PROVIDER: S-EPMC8444307 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature

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Inhibition Effect of Solid Products and DC Breakdown Characteristics of the HFO1234Ze(E)-N2-O2 Ternary Gas Mixture.

Liu Heng H Li Qingmin Q Wang Jingrui J Jiang Yuheng Y Haddad A Manu AM

ACS omega 20210831 36

HFO1234ze(E) is an environmentally friendly SF6 substitute gas with prominent application potential. To suppress the generation of the HFO1234ze(E) solid decomposition products, which may cause great hazards to the gas-solid insulation strength, a gas mixing scheme screening method based on the reactive force field (ReaxFF) molecular dynamics (MD) simulation was innovatively proposed. The simulation results show that the inhibitory effect of O2 on the formation of HFO1234ze ...[more]

PMID: 34549128

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Project description:This paper analyzes the effective use of a mixture of fly ash (MSWI-FA) and solid waste from flue gas treatment (MSWI-SW), which are by-products of the municipal waste incineration process. MSWI-FA (19 01 13*) and MSWI-SW (19 01 07*) are classified as hazardous waste due to their toxic metal content and leaching potential, and currently lack practical applications, unlike slag and bottom ash (19 01 12). This study tested these wastes as partial substitutes for natural sand within a range of 0-20% of cement mass. Statistical analysis of the experimental results allowed the creation of good quality models predicting the effect of substitution additives on compressive strength and flexural strength (correlation 0.91 and 0.93, respectively). The mixture with the highest share of substitution additives (40% = 20% + 20%) was characterized by a decrease in compressive strength by 1.3% and flexural strength by 25.8%. Cement mortars synthesized with the waste mixture (up to 20% of each component) showed slightly lower consistency and water absorption than the control mortars. After the frost resistance tests (25 cycles), the flexural and compressive strength showed ambiguous behavior, showing both increases and decreases, indicating that the percentage of waste components alone is an insufficient set of factors for predicting these strength properties. The concentration of metal ions, i.e., Zn, Cu, Pb, Ni, Cu, and Cr, in the eluate after the leaching tests did not exceed the legal levels of pollutants introduced into waters, with the exception of barium. However, its content did not exceed the permissible levels required for waste intended for landfill. Using the mixing plant for this waste in the amount of 20% each, we save about EUR 10 in the cost of purchasing sand (which is 13% of the production costs of 1 m3) and EUR 8 in the cost of environmental fees when producing 1 m3 of mortar. The proposed technology is compatible with the objectives of a sustainable economy.

Dataset Information

Inhibition Effect of Solid Products and DC Breakdown Characteristics of the HFO1234Ze(E)-N₂-O₂ Ternary Gas Mixture.

Publications

Inhibition Effect of Solid Products and DC Breakdown Characteristics of the HFO1234Ze(E)-N<sub>2</sub>-O<sub>2</sub> Ternary Gas Mixture.

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