Mitigation of greenhouse gases released from mining activities: A review

Liu, Li Yuan; Ji, Hong; Lü, Xiang feng; Wang, Tao; Zhi, Sheng; Pei, Feng; Quan, Dao lu

doi:10.1007/s12613-020-2155-4

Cited by 47 publications

(17 citation statements)

References 51 publications

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“…In China, underground metal mines account for 90% of the total metal mines and the mining depth is becoming deeper [18]- [20]. Moreover, the average ore grades of some key minerals (e.g., iron) are significantly lower than the global average grades [19].…”

Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 99%

Technology strategies to achieve carbon peak and carbon neutrality for China’s metal mines

Guo

Yang

et al. 2022

Int J Miner Metall Mater

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Greenhouse gas (GHG) emissions related to human activities have significantly caused climate change since the Industrial Revolution. China aims to achieve its carbon emissions peak before 2030 and carbon neutrality before 2060. This paper attempts to review and discuss technical strategies to achieve the "dual-carbon" targets in Chinese metal mines. First, global carbon emissions and emission intensity from metal mining industries are analysed. The metal mining status and carbon emissions in China are then examined. Further, advanced technologies for carbon mitigation and carbon sequestration in metal mines are reviewed. Finally, a technical roadmap for achieving carbon-neutrality in Chinese metal mines are proposed. It has been found that some international giants have already made carbon reduction targets and planned to achieve carbon neutrality by 2050. Moreover, improving mining efficiency by developing advanced technologies and replacing fossil fuel with renewable energy are two key approaches to reducing GHG emissions. Green mines can significantly benefit the carbon neutrality process for metal mines through carbon absorption of reclamation vegetation. The geothermal energy extraction from operating and abandoned metal mines is a promising technology for providing clean energy and contributing to the carbon neutrality target for Chinese metal mines. Carbon sequestration by mining backfill and tailing through mineral carbonation has the potential to permanently and safely store carbon dioxide, which can eventually transform the metal mining industry to become carbon neutral or even carbon negative.

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Section: Accepted Manuscript N O T C O P Y E D I T E Dmentioning

confidence: 99%

Technology strategies to achieve carbon peak and carbon neutrality for China’s metal mines

Guo

Yang

et al. 2022

Int J Miner Metall Mater

View full text Add to dashboard Cite

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“…With the rapid development of the economy, the demand for energy will continue to grow, large amounts of fossil energy are consumed. At the same time, large quantities of greenhouse gases are emitted into the atmosphere, causing environmental pollution and rising temperatures [1,2]. Fossil fuels have collectively been the single largest source of CO 2 emissions, responsible for nearly 65% of the global greenhouse gas emissions [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Experimental study on supercritical carbon dioxide gasification of biomass

Zhou

Wang

et al. 2023

Carb Neutrality

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With the excessive use of fossil energy and concern for environmental protection, biomass gasification as an effective means of biomass energy utilization has received widespread attention worldwide. Supercritical carbon dioxide (SCCO2) (T ≥ 31.26 °C, P ≥ 72.9 atm) has the advantages of near liquid density and high solubility, and the supercritical carbon dioxide gasification of biomass will be a promising technology. However, there has been no research on the technology at present. In this work, experimental study on supercritical carbon dioxide gasification of biomass were carried out in a batch reactor. The influences of temperature, residence time, the amount of carbon dioxide and catalyst on gas yield and fraction were investigated. Experimental results showed that the gas yield and carbon gasification efficiency (CE) of biomass gasification increased with increasing temperature, reaction time or the amount of carbon dioxide. As the gasification temperature increased from 700 °C to 900 °C, the gas yield increased from 23.53 to 50.24 mol/kg biomass and CE increased from 47.26% to 94.53% in CO2 atmosphere at 30 min. The gasification efficiency of biomass was greatly improved with catalyst, and the effect of impregnated catalyst was better than that of mechanical mixing. The gas yield increased from 23.72 to 50.24 mol/kg biomass with the increasing of the equivalent ratio from 0 to 1 at 900 °C and 30 min. Finally, a detailed supercritical carbon dioxide gasification mechanism of biomass was proposed.

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“…They must vigorously develop new energy resources and take the road of green and low-carbon development and utilization innovation [10,11]. The utilization of coalbed methane can significantly reduce carbon emissions compared with direct release [12]. The application prospects of coalbed methane cascade utilization technology are bright.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Experimental Analysis of Dynamic Continuous Operation of Low-Concentration Coalbed-Methane-Mixing Device

2022

Processes

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The concentration of low-concentration coalbed methane extracted from underground coal mine fluctuates greatly, which does not meet the requirements of intake concentration of coalbed-methane utilization devices. Due to this fluctuation, the coalbed-methane-utilization device cannot maintain stable and safe operation. The gas-mixing device is mainly used in coalbed-methane-utilization systems, providing each with a stable feed gas source with qualified concentration. In order to solve the problems of unsatisfactory uniformity of gas mixing and the large resistance of the existing coalbed-methane-mixing device, the mathematical model of the internal flow of the gas-mixing device is established. The influence of the internal structure of the gas-mixing device on the change in the uniformity of gas mixing and resistance loss is studied by numerical simulation and experiment. When the flow is 7000 Nm3/h, 50,000 Nm3/h and 160,000 Nm3/h, respectively, the spiral structure combination of L-N-R, N-L-R and L-N-R is optimal (L, R, N indicate left rotation, right rotation and without setting screw, respectively). There are some defects in the processing technology of the experimental device, which make the simulation and experimental data different. The numerical simulation of the gas-mixing process inside the unit can provide technical means for reducing resistance and improving the uniformity of gas mixing, and provide a stable gas source and safety measures for the coalbed-methane-utilization unit.

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Mitigation of greenhouse gases released from mining activities: A review

Cited by 47 publications

References 51 publications

Technology strategies to achieve carbon peak and carbon neutrality for China’s metal mines

Technology strategies to achieve carbon peak and carbon neutrality for China’s metal mines

Experimental study on supercritical carbon dioxide gasification of biomass

Numerical Simulation and Experimental Analysis of Dynamic Continuous Operation of Low-Concentration Coalbed-Methane-Mixing Device

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