Experimental and thermodynamic comparison between a novel CO2/CH4 and an oxygen submerged DC thermal plasma for treatment of sebacic acid in basic aqueous solution

Safa, Sanaz; Hekmat-Ardakan, Alireza; Soucy, Gervais

doi:10.1016/j.jece.2014.09.003

Cited by 2 publications

(2 citation statements)

References 10 publications

(19 reference statements)

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“…As shown in Figure 3, the reaction between CO 2 and CH 4 by varying the temperature up to 5000 • C under atmospheric pressure produced different gaseous species. Furthermore, C + formation was discovered at around 3000 • C, allowing for cathode protection and extending its lifetime [29]. The CO 2 and CH 4 levels decreased during the reaction, resulting in more H 2 and CO and making the medium more reductive [30]; furthermore, increasing the temperature reduced the amount of water vapor produced because the ratio (1:1) does not favor the production of H 2 O [31].…”

Section: Thermodynamic Studymentioning

confidence: 99%

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Reduction of an Ilmenite Concentrate by Using a Novel CO2/CH4 Thermal Plasma Torch

El Khalloufi,

Soucy,

Lapointe

et al. 2024

Minerals

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Plasma technology has emerged as a very helpful tool in a variety of sectors, notably metallurgy. Innovators and scientists are focused on the problem of finding a more ecologically friendly way of extracting titanium and iron metal from natural ilmenite concentrate for industrial applications. A direct current (DC) plasma torch operating at atmospheric pressure is used in this study to describe a decarbonization process for reducing an ilmenite concentrate. The plasma gases employed in this torch are CO2 and CH4. The molar ratio of the gases may be crucial for achieving a satisfactory reduction of the ilmenite concentrate. As a result, two molar ratios for CO2/CH4 have been chosen: 1:1 and 2:1. During torch operation, a thin layer of graphite is formed on the cathode to establish a protective barrier, prolonging the cathode’s life. The material was analyzed using X-ray diffraction (XRD) and scanning electron microscopy with energy dispersive spectroscopy (SEM-EDS). The output gases were analyzed using mass spectrometry (MS). In addition, a thermodynamic analysis was performed to predict the development of thermodynamically stable phases. An economic assessment (including capital expenditures (CAPEX) and operating expenditures (OPEX)) and a carbon balance were developed with the feasibility of the piloting in mind.

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Section: Thermodynamic Studymentioning

confidence: 99%

“…Figures 14 and 15 show that the amount of oxygen has been reduced. which causes the CO 2 level to decrease as the temperature within the reactor increases [29]. As a result, the CH 4 quantity is critical, and increasing it causes the plasma torch to have more reduction power.…”

Section: Sem-eds Analysismentioning

confidence: 99%