A novel concept for ultra-low concentration methane treatment based on chemical looping catalytic oxidation

Song, Chen; Liu, Fang; Kang, Weiliao; Zhao, Jiangyuan; Yang, Li; Guo, Chuwen

doi:10.1016/j.fuproc.2021.107159

Cited by 14 publications

(3 citation statements)

References 54 publications

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“…Approximately 70% of the methane emitted from coal mines is released into the air as ventilation gas, and a large number of greenhouse gas emissions aggravate global climate change (Karakurt et al 2011;Song et al 2022). Therefore, the utilisation of full concentration of methane is considered to be a promising method of environmental treatment.…”

Section: Discussionmentioning

confidence: 99%

Environmental life cycle assessment of large-scale coal mining with annual output of more than one million tonnes

Tao

Cheng

et al. 2022

Preprint

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Coal occupies an absolute advantage in the primary energy structure of China. However, the production of coal poses a serious threat to the ecological environment and human health. In order to quantify the environmental impact of coal mining, this study used the life cycle assessment (LCA) method to analyse the life cycle of coal mining from the cradle- to-gate. Midpoint results based on ReCiPe 2016 indicated that coal mining had a remarkable impact on human carcinogenic toxicity, marine ecotoxicity, freshwater ecotoxicity, fossil resource scarcity, and human non-carcinogenic toxicity. The contribution analysis revealed that material production was identified as the main cause of environmental impacts, followed by energy consumption and process emissions. Steel consumption, electricity production and wastewater discharge were identified as key environmental pollution processes. In addition, specific environmental pollution substances and their contributions were recognized from the source, and sensitivity analysis between key processes and key impact categories was carried out. At the endpoint level, coal mining led to the most damage to human health, followed by ecosystems and resources. This study is of reference significance in guiding the construction of green mines and achieving sustainable development of coal resources.

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Section: Discussionmentioning

confidence: 99%

Environmental life cycle assessment of large-scale coal mining with annual output of more than one million tonnes

Tao

Cheng

et al. 2022

Preprint

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“…There are various methods for purifying gas-air mixture (GAM) from organic compounds emitted into the atmosphere based on absorption [7], adsorption [8], thermal and catalytic oxidation [9]. The choice of cleaning method depends on many indicators.…”

Section: Introductionmentioning

confidence: 99%

Study of the influence of corona discharge on the efficiency of oxidation of organic impurities using ozone

Soloveva,

Solovev,

Voropai

et al. 2024

E3S Web Conf.

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Purification of air containing volatile organic compounds is an important task in many industries. This article examines the effect of corona discharge on the efficiency of the oxidation of organic mixtures. As a result of our research, we found that the consumption of ozone for the oxidation of various components of the mixture is approximately the same. This means that other particles, including water vapor, also take part in oxidation reactions.

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“…Catalytic oxidation of methane has become one of the most effective ways to reduce the low methane concentration by choosing a suitable catalyst that will reduce the activation energy of the reaction and make it a flameless reaction at a lower ignition temperature [ 28 ]. The oxidation of methane can be proceeded by the adsorption of oxygen on the oxygen carrier of Fe 2 O 3 and the catalytic oxidation of methane after complete oxidation [ 29 ]. During the catalytic oxidation of methane, some carbon was deposited on the catalysts.…”

Section: Introductionmentioning

confidence: 99%

Hematites Precipitated in Alkaline Precursors: Comparison of Structural and Textural Properties for Methane Oxidation

Valášková

Leštinský²,

Matějová³

et al. 2022

IJMS

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Hematite (α-Fe2O3) catalysts prepared using the precipitation methods was found to be highly effective, and therefore, it was studied with methane (CH4), showing an excellent stable performance below 500 °C. This study investigates hematite nanoparticles (NPs) obtained by precipitation in water from the precursor of ferric chloride hexahydrate using precipitating agents NaOH or NH4OH at maintained pH 11 and calcined up to 500 °C for the catalytic oxidation of low concentrations of CH4 (5% by volume in air) at 500 °C to compare their structural state in a CH4 reducing environment. The conversion (%) of CH4 values decreasing with time was discussed according to the course of different transformation of goethite and hydrohematites NPs precursors to magnetite and the structural state of the calcined hydrohematites. The phase composition, the size and morphology of nanocrystallites, thermal transformation of precipitates and the specific surface area of the NPs were characterized in detail by X-ray powder diffraction, transmission electron microscopy, infrared spectroscopy, thermal TG/DTA analysis and nitrogen physisorption measurements. The results support the finding that after goethite dehydration, transformation to hydrohematite due to structurally incorporated water and vacancies is different from hydrohematite α-Fe2O3. The surface area SBET of Fe2O3_NH-70 precipitate composed of protohematite was larger by about 53 m2/g in comparison with Fe2O3_Na-70 precipitate composed of goethite. The oxidation of methane was positively influenced by the hydrohematites of the smaller particle size and the largest lattice volume containing structurally incorporated water and vacancies.

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A novel concept for ultra-low concentration methane treatment based on chemical looping catalytic oxidation

Cited by 14 publications

References 54 publications

Environmental life cycle assessment of large-scale coal mining with annual output of more than one million tonnes

Environmental life cycle assessment of large-scale coal mining with annual output of more than one million tonnes

Study of the influence of corona discharge on the efficiency of oxidation of organic impurities using ozone

Hematites Precipitated in Alkaline Precursors: Comparison of Structural and Textural Properties for Methane Oxidation

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