4.6 Article

A comprehensive insight into the effects of acidification on varied-sized pores in different rank coals

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Energy & Fuels

Characterization of ultrasonic induced damage on multi-scale pore/fracture in coal using gas sorption and ?-CT 3D reconstruction

Peng Liu et al.

Summary: This study quantitatively characterizes the damage of multi-scale pores and fractures in coal induced by power ultrasonic stimulation using gas sorption and CT image-based 3D reconstruction. The results show that ultrasound treatment can significantly improve the multi-scale structure of pores and fractures in coal, thereby enhancing coalbed methane production.
Article Green & Sustainable Science & Technology

Structural emissions reduction of China's power and heating industry under the goal of double carbon: A perspective from input-output analysis

Tangyang Jiang et al.

Summary: Since 2020, emissions reduction has been a key focus for the Chinese government. The power and heating sector in China accounts for about 50% of total energy utilization. This study examines the structural emission reduction of China's power and heating industry from 2007 to 2015 using various analytical methods. The findings show that factors such as energy intensity, input, and energy composition play a critical role in reducing CO 2 e emissions. The ultimate demand is identified as the core driving factor for CO 2 e growth in the power and heating sector. Low-carbon power has a reduction effect, while high-carbon energy sources do not show significant emissions reduction.

SUSTAINABLE PRODUCTION AND CONSUMPTION (2022)

Review Energy & Fuels

Coal Structure and Its Implications for Coalbed Methane Exploitation: A Review

Lijing Li et al.

Summary: Coal structure, including macroscopic and microscopic deformation, pore structure, and mechanical properties, significantly impacts coal mining safety and coalbed methane (CBM) exploitation. Different coal structures are categorized as primary coals and tectonically deformed coals (TDCs). Various techniques, such as geophysical logging, seismic inversion, SEM, NMR, and FTIR, are used to explore the macro- and microscopic petrophysics of TDCs. Studies have shown that TDCs in the brittle series have potential for CBM exploration, while those in the ductile series pose risks for coal mining and gas outbursts. This review provides insights into the significance of coal structure in CBM exploitation and suggests future research directions.

ENERGY & FUELS (2021)

Article Energy & Fuels

Permeability Enhancement via Acetic Acid (CH3COOH) Acidizing in Coals Containing Fracture-Filling Calcite

Qiang Chen et al.

Summary: This study investigates the use of acetic acid (CH3COOH) for improving permeability in coal seams with fracture-filling calcite, demonstrating significant increases in permeability due to the high reactivity of calcite in the presence of CH3COOH. The results show the formation of highly conductive flow channels and the potential for deep matrix acidizing treatment using CH3COOH for enhanced coalbed methane recovery.

ENERGY & FUELS (2021)

Article Energy & Fuels

Methane Adsorption Capacity of Deep-Buried Coals Based on Pore Structure in the Panji Deep Area of Huainan Coalfield, China

Qiang Wei et al.

Summary: Characterizing the pore structure and methane adsorption capacity of deep-buried coals is crucial for understanding the adsorption mechanism in deep strata. The presence of multiple pore types and microfractures in deep-buried coals was observed, with micropores contributing to a majority of the specific surface area. The measured methane adsorption capacity was found to be closely correlated with the volume and specific surface area of micropores, indicating that the adsorption process primarily involves micropore filling.

ENERGY & FUELS (2021)

Article Energy & Fuels

Permeability, mineral and pore characteristics of coals response to acid treatment by NMR and QEMSCAN: Insights into acid sensitivity mechanism

Zhengshuai Liu et al.

Summary: The sensitivity of the coal reservoir to acids can impact the production of coalbed methane. Core flooding experiments with acid treatments were conducted to investigate the mechanism, revealing permeability damage and changes in mineral distribution and pore structure. The dissolution of minerals, generation of new precipitates, and migration of particles were observed during the experiments.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2021)

Review Energy & Fuels

Coal Pores: Methods, Types, and Characteristics

Pengwei Mou et al.

Summary: This study systematically investigated coal pore testing technologies and methods, pore classification methods, and coal pore structure characteristics. Different testing methods have limitations and there is a need for a comprehensive method for accurate quantitative characterization of closed pores in coal. In situ measurement of coal pores is a future research trend.

ENERGY & FUELS (2021)

Article Energy & Fuels

Evaluation of pore properties in coal through compressibility correction based on mercury intrusion porosimetry: A practical approach

Yunbo Li et al.

Summary: This study conducted a series of experiments to characterize the accurate pore structure of coal and proposed a new pore volume correction method for MIP data. The relationship model between mercury intrusion pressure and pore diameter was revised, and a new sample preparation method was recommended to minimize interparticle pores effect and pockmark effect in MIP test. The findings of this study have significant impact on future gas transport modeling in various coals.
Article Energy & Fuels

Chelating agent-introduced unconventional compound acid for enhancing coal permeability

Shuya Chen et al.

Summary: The low permeability of coalbed methane (CBM) reservoirs is attributed to cementing minerals, which block the flow of water and gas in the pores and fractures. Acid stimulation is a promising method to improve coal permeability by dissolving these inorganic minerals. Laboratory experiments investigated the interactions between various acids and coal samples, leading to the optimization of a compound acid system that greatly enhanced CBM recovery by increasing coal porosity and permeability.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2021)

Article Geosciences, Multidisciplinary

Characterization of Full Pore and Stress Compression Response of Reservoirs With Different Coal Ranks

Jielin Lu et al.

Summary: The accurate characterization of coal pore structure is crucial for CBM development. Different coal rank reservoirs exhibit varying matrix and pore/fracture compressibility, with low-rank coal showing the highest compressibility. As effective stress increases, the compressibility of microfractures decreases, and the compressibility of coal decreases with higher coal rank.

FRONTIERS IN EARTH SCIENCE (2021)

Article Chemistry, Multidisciplinary

Chemical Modification Effect of Compound Solutions of Surfactants with Acetic Acid on Coal Pores

Jun Xie et al.

Summary: The compound modification of surfactants and acetic acid has been found to lead to the transformation of pore shape and affect a wider pore size range in coal samples. Anionic and cationic surfactants can increase hydrophilicity and promote the connection of larger pores, while non-ionic surfactants reduce hydrophilicity, increase porosity, promote connection of pores, and simplify pore structure. Non-ionic surfactants are found to be more conducive to coal seam pore reconstruction compared to anionic and cationic surfactants.

ACS OMEGA (2021)

Article Chemistry, Multidisciplinary

Experimental Studies on the Enhancement of Permeability of Anthracite by Acidizing: A Case Study in the Daning Block, Southern Qinshui Basin

Zhiqi Guo et al.

Summary: Acidification treatments on anthracites in the southern Qinshui Basin can enhance the permeability of coalbed methane by dissolving acid-soluble minerals, freeing up cleat spaces, improving cleat connectivity, and ultimately increasing the fluid movement and coal permeability.

ACS OMEGA (2021)

Article Energy & Fuels

Effects of composition changes of coal treated with hydrochloric acid on pore structure and fractal characteristics

Minghao Yi et al.

Summary: The hydrochloric acid treatment significantly reduced the content of minerals and volatile matter in coal, which increased the porosity and pore connectivity of coal. The role of minerals in pores of different sizes varied, affecting the evolution of coal pore structure.
Article Energy & Fuels

Nanopore structure of deep-burial coals explored by AFM

Xianfeng Liu et al.

Article Energy & Fuels

Molecular structure controls on micropore evolution in coal vitrinite during coalification

Yu Liu et al.

INTERNATIONAL JOURNAL OF COAL GEOLOGY (2018)

Article Energy & Fuels

A study into the effect of cleat demineralisation by hydrochloric acid on the permeability of coal

Luc G. Turner et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2016)

Article Energy & Fuels

Changes in coal pore structure and permeability during N2 injection

Haichao Wang et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2015)

Article Chemistry, Physical

Physical adsorption characterization of nanoporous materials: progress and challenges

Matthias Thommes et al.

ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY (2014)

Article Energy & Fuels

Research on comprehensive CBM extraction technology and its applications in China's coal mines

Haifeng Wang et al.

JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING (2014)

Article Mining & Mineral Processing

Influence of magma intrusion on gas outburst in a low rank coal mine

Chen Shangbin et al.

INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY (2012)

Article Environmental Sciences

The internal microstructure and fibrous mineralogy of fly ash from coal-burning power stations

Patrick Brown et al.

ENVIRONMENTAL POLLUTION (2011)