Showing papers on "Coal published in 2022"
TL;DR: A review of hydrogen storage strategies can be found in this paper , where the authors survey the recent developments in the field and present a survey of the current state of the art in hydrogen storage.
Abstract: Fossil fuels comprising coal, crude oil, and natural gas are non-renewable and greatly harmful to the environment. Hydrogen, on the other hand, is both sustainable and environmentally friendly. However, due to its light weight and gaseous nature, it presents challenging problems of its storage, and the practical hydrogen storage is perhaps the biggest hurdle in the success of the hydrogen economy on a large scale. Hydrogen can be stored in a variety of physical and chemical methods. Each storage technique has its own advantages and disadvantages. It is the subject of this study to review the hydrogen storage strategies and to survey the recent developments in the field.
97 citations
TL;DR: In this paper , the failure mechanism and control technology of the gob-side entry retaining in short-distance coal seam were investigated in Xieqiao mine, and the onsite monitoring showed that the maximum subsidence of the reserved roof along the gob was 180 mm and the maximum approaching distance of the two banks was 328 mm, which met the engineering requirements.
80 citations
TL;DR: In this article , a review of key factors affecting the hydrogen production yield from steam gasification of plant-originated lignocellulosic biomass, including the design of the gasifier, temperature, pressure, and steam-to-biomass ratio, steam flow rate, moisture and particle size of fed biomass, and catalysts were thoroughly analyzed.
71 citations
TL;DR: In this paper , the impact of energy consumption and usage of fossil sources (e.g., oil, gas, coal), nuclear energy, and renewable energy on carbon dioxide (CO2) emission by considering the significance of the environmental degradation for countries as well as people was examined.
68 citations
TL;DR: In this paper , a series of microscopic tests and a thermal damage simulation were combined to evaluate the changes in the internal structure of coal caused by liquid nitrogen (LN 2 ) cooling, firstly, Brazilian splitting tests were carried out on the bedding coal, and influences of cryogenic cooling fracturing and bedding orientation on mechanical properties and fracture morphology of coal were analyzed.
66 citations
TL;DR: In this article , the authors provide a general techno-economic review of carbon capture and storage (CCS)/carbon capture, utilisation and storage systems, and compare the technology readiness, technical performance, energy requirement and cost associated with CO2 capture, separation, transport, utilization and storage technologies.
63 citations
TL;DR: In this article, the influence of different liquid nitrogen freezing variables on the mechanical properties of coal, Brazilian splitting, uniaxial compression, and ultrasonic velocity measurement tests of saturated frozen coal were carried out, and it was concluded that when liquid nitrogen acts on coal, the change in mechanical properties is the result of the combined action of multiple forces.
57 citations
TL;DR: In this paper , the influence of different liquid nitrogen freezing variables on the mechanical properties of coal, Brazilian splitting, uniaxial compression, and ultrasonic velocity measurement tests of saturated frozen coal were carried out, and it was concluded that when liquid nitrogen acts on coal, the change in mechanical properties is the result of the combined action of multiple forces.
57 citations
TL;DR: In this article, a method using nuclear magnetic resonance (NMR) spectroscopy was proposed to define adsorbed/free methane ratios in powdered coal at pressures up to 15MPa and to verify its fidelity against standard isothermal adsorption measurements.
56 citations
54 citations
TL;DR: In this article , the impact dynamics experiments were conducted to study energy characteristics based on split Hopkinson pressure bar (SHPB) system, and the incident, reflected and transmission strain were collected to calculate various energy.
TL;DR: In this article , the authors analyzed heavy metal contamination and the ecological and health risks of various soils with different quality levels, and through the PMF model and risk assessment techniques, the ecological risks of specific pollution sources and their interaction with soil quality were investigated.
TL;DR: In this article , a method of surface wettability alteration through a water-based SiO2 nanofluid was proposed to overcome the shortcomings of coal seams and easy filtration loss of injected water, and the underlying action mechanism was elucidated.
TL;DR: In this paper, the effect of ultrafine water mist with phosphorus-containing compounds (PCCs) on the flame in CH4/coal dust explosion is experimentally and numerically investigated.
TL;DR: In this paper, an experimental system of CO2 displacing CH4 was used to analyse the changes in gas composition, outlet flow rate, coal seam temperature, and displacement efficiency parameters during CO2 injection.
TL;DR: In this paper, the authors assess the impact of fugitive emissions and lower capture rates on total emissions and costs, and find that emissions from gas or coal based hydrogen production systems could be substantial even with CCS, and the cost of CCS is higher than often assumed.
TL;DR: In this article, the authors made a critical summary of recent progress in the study of rare earth elements and yttrium (REY) in coal ash, including Si-Al glassy association, discrete minerals or compounds, and organic association.
TL;DR: In this article, the authors measured H2 adsorption rate in an Australian anthracite coal sample at isothermal conditions for four different temperatures at equilibrium pressure ∼13 bar, and calculated H2 diffusion coefficient (D H 2 ) at each temperature.
TL;DR: In this article , a method using nuclear magnetic resonance (NMR) spectroscopy was proposed to define adsorbed/free methane ratios in coal at pressures up to 15 MPa and to verify its fidelity against standard isothermal adsorption measurements.
TL;DR: In this paper, a critical review provides a holistic picture of coal fly ash (CFA), from the generation, fundamental characteristics, environmental concerns to potential applications, and benefits analysis, which indicates that CBA is a promising candidate in normal, lightweight, selfcompacting, and ultra-high-performance concrete, which shows a reduction in both energy consumption and greenhouse gas emissions during concrete production.
TL;DR: In this paper , a critical review provides a holistic picture of coal bottom ash (CBA), from the generation, fundamental characteristics, environmental concerns to potential applications, and benefits analysis, which indicates that CBA is a promising candidate in normal, lightweight, self-compacting, and ultra-high-performance concrete, which shows a reduction in both energy consumption and greenhouse gas emissions during concrete production.
TL;DR: In this paper , a hierarchical model of coal burst prediction is established, and the weight of each influencing factor to coal burst risk is calculated, based on the fuzzy comprehensive evaluation method, which can scientifically decompose and simplify the complicated problem and make coal burst detection and prevention more pertinent and effective.
Abstract: Coal burst has become a worldwide problem that needs to be solved urgently for the sake of coal mine safety production due to its complicated triggering mechanisms and numerous influencing factors. The risk assessment of coal burst disasters is particularly critical. In this work, 15 factors affecting coal burst occurrence are selected from the perspectives of geodynamic environment and geological and mining conditions, and the influence mechanism of each factor on coal bursts is analyzed. An evaluation index system of coal burst risk is put forward. A hierarchical model of coal burst prediction is established, and the weight of each influencing factor to coal burst risk is calculated. Based on the fuzzy comprehensive evaluation method, a coal burst prediction model is established, which can scientifically decompose and simplify the complicated problem and make coal burst prediction and prevention more pertinent and effective. The model is applied to assess the coal burst risk level of a coal mine in Shanxi Province, and the evaluation result is consistent with practical situations. This method considers the influencing factors comprehensively and determines the weight of each factor scientifically compared with other forecasting methods.
TL;DR: In this article , an experimental system of CO2 displacing CH4 was used to analyse the changes in gas composition, outlet flow rate, coal seam temperature, and displacement efficiency parameters during CO2 injection.
TL;DR: In this paper, the authors investigated the evolution of coal microstructure during spontaneous combustion in an oxygen-lean atmosphere, and the sensitivity of different active functional groups to oxygen concentrations was analyzed.
TL;DR: In this article , the impact of environmental regulations on firms' energy-saving behavior by employing a quasi-natural experiment was explored by employing China's low-carbon pilot (LCP) city policy.
TL;DR: In this paper , the authors made a critical summary of recent progress in the study of rare earth elements and yttrium (REY) in coal ash, including Si-Al glassy association, discrete minerals or compounds, and organic association.
TL;DR: In this article , the effect of ultrafine water mist with phosphorus-containing compounds (PCCs) on the flame in CH4/coal dust explosion is experimentally and numerically investigated.
TL;DR: In this article, a series of coal-based hierarchical porous carbons with adjustable pores were successfully prepared with the assistance of the soluble salt Zinc chloride (ZnCl2) during the carbonization process, with a low melting point (238°C), "in situ occupied" and "occupied" within the coal solids to generate interconnected pores.
TL;DR: In this article , the authors measured H2 adsorption rate in an Australian anthracite coal sample at isothermal conditions for four different temperatures (20, 30, 45, and 60 °C), at equilibrium pressure ∼ 13 bar, and calculated H2 diffusion coefficient at each temperature.