Clean coal geology in China: Research advance and its future

Wang, Xiaoshuai; Tang, Yuegang; Wang, Shaoqing; Schobert, Harold H.

doi:10.1007/s40789-020-00321-4

Cited by 32 publications

(15 citation statements)

References 52 publications

(54 reference statements)

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“…Coal mine methane (CMM) is a byproduct of coal production and comprises mainly CH 4 (Karacan et al 2011;Fu et al 2020). CMM is a clean and efficient fuel that can be used for power generation, heating, and civil usage, but its presence is a critical threat to the safety of coal mining (Wang et al 2020b). In general, underground methane drainage is an effective means of reducing the amount of CMM, thereby preventing methane disasters (Wang et al 2014;Zhao et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Method for designing the optimal sealing depth in methane drainage boreholes to realize efficient drainage

Wang

Chen

et al. 2021

Int J Coal Sci Technol

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The purpose of underground methane drainage technology is to prevent methane disasters and enable the efficient use of coal mine methane (CMM), and the sealing depth is a key factor that affects the performance of underground methane drainage. In this work, the layouts of in-seam and crossing boreholes are considered to analyze the stress distribution and failure characteristics of roadway surrounding rock through a numerical simulation and field stress investigation to determine a reasonable sealing depth. The results show that the depths of the plastic and elastic zones in two experimental coal mines are 16 and 20 m respectively. Borehole sealing minimizes the air leakage through the fractures around the roadway when the sealing material covers the failure and plastic zones, and the field test results for CMM drainage at different sealing depths indicate that the CMM drainage efficiency increases with increasing sealing depth but does not change once the sealing depth exceeds the plastic zone. Moreover, sealing in the high-permeability roadway surrounding rock does not have a strong influence on the borehole sealing performance. Considering these findings, a new CMM drainage system for key sealing in the low-permeability zone was developed that is effective for improving the CMM drainage efficiency and prolonging the high-concentration CMM drainage period. The proposed approach offers a valuable quantitative analysis method for selecting the optimum sealing parameters for underground methane drainage, thereby improving considerably the drainage and utilization rates of CMM.

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Section: Introductionmentioning

confidence: 99%

Method for designing the optimal sealing depth in methane drainage boreholes to realize efficient drainage

Wang

Chen

et al. 2021

Int J Coal Sci Technol

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“…It is widely used in many industries such as electric power, iron and steel, metallurgy, chemical, and building materials. Coal accounts for more than 50% of China s primary energy production and consumption structure, and China is the largest consumer of coal [1,2]. With the change in the world s climate and environment, the clean and efficient use of coal is particularly important.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Porous Material from Coal Gasification Fine Slag Residual Carbon and Its Application in Removal of Methylene Blue

et al. 2021

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A large amount of coal gasification slag is produced every year in China. However, most of the current disposal is into landfills, which causes serious harm to the environment. In this research, coal gasification fine slag residual carbon porous material (GFSA) was prepared using gasification fine slag foam flotation obtained carbon residue (GFSF) as raw material and an adsorbent to carry out an adsorption test on waste liquid containing methylene blue (MB). The effects of activation parameters (GFSF/KOH ratio mass ratio, activation temperature, and activation time) on the cation exchange capacity (CEC) of GFSA were investigated. The total specific surface area and pore volume of GSFA with the highest CEC were 574.02 m2/g and 0.467 cm3/g, respectively. The degree of pore formation had an important effect on CEC. The maximum adsorption capacity of GFSA on MB was 19.18 mg/g in the MB adsorption test. The effects of pH, adsorption time, amount of adsorbent, and initial MB concentration on adsorption efficiency were studied. Langmuir isotherm and quasi second-order kinetic model have a good fitting effect on the adsorption isotherm and kinetic model of MB.

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“…In China in 2016, building energy consumption accounted for 20.6% of the total energy consumption (China Building Energy Conservation Association 2018). To reduce the dependence on fossil energy, various countries and regions have promoted CE, with clean coal technology being an effective means of addressing coal-based pollution (Wang et al 2020). In the process of urbanization in China, CE substitution in buildings is a new requirement of green development.…”

Section: Introductionmentioning

confidence: 99%

Clean-energy utilization technology in the transformation of existing urban residences in China

Zhao

Chen

et al. 2021

Int J Coal Sci Technol

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Clean-energy substitution technology for existing residential buildings in cities is an inevitable choice for sustainable development and low-carbon ecological city construction. In this paper, the current status of energy-saving renovation and renewable-energy applications for existing residential buildings in various cities in China was summarized by using statistical methods. The geographical distribution of clean-energy power generation in primary energy production in China was explored in depth. According to different climatic divisions for existing urban residences, clean-energy production and consumption were analyzed and predicted based on the STIRPAT model. The results show that the energy consumption of urban residential buildings in 2016 increased by 43.6% compared with 2009, and the percentage of clean energy also increased from 7.9% to 13.4%. Different climatic regions have different advantages regarding clean energy: nuclear power generation leads in the region that experiences hot summers and warm winters, whereas wind and solar power generation lead in the cold and severely cold regions. The present results provide basic data support for the planning and implementation of clean-energy upgrading and transformation systems in existing urban residences in China.

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Clean coal geology in China: Research advance and its future

Cited by 32 publications

References 52 publications

Method for designing the optimal sealing depth in methane drainage boreholes to realize efficient drainage

Method for designing the optimal sealing depth in methane drainage boreholes to realize efficient drainage

Synthesis of Porous Material from Coal Gasification Fine Slag Residual Carbon and Its Application in Removal of Methylene Blue

Clean-energy utilization technology in the transformation of existing urban residences in China

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