Results 31 to 40 of about 1,378 (225)

Key technologies and prospect for in-situ gasification mining of deep coal resources

矿业科学学报, 2021
China has rich reserves of deep coal resources, and underground coal gasification can transform coal into gas and transport it to the ground, which is an important way for in-situ fluidized mining of deep coal.This article introduces the development ...
Liu Shuqin, Chang Zhibing, Liu Jinchang
doaj   +1 more source

Analysis of recovery rate for underground coal gasification based on strength and permeability

Meitan xuebao, 2023
The medium and deep underground coal gasification (UCG) is a new technology of coal utilization, and there is still lack of criterions to evaluate recovery rate.
Pengcheng HAO, Chuangye WANG, Meng LIU, Wangkun CAO, Xiang LI, Shuxia YUAN, Song WU, Wenjiao QI   +7 more
doaj   +1 more source

Investigation of Underground Coal Gasification in Laboratory Conditions: A Review of Recent Research

Energies, 2023
The underground coal gasification (UCG) technology converts coal into product gas and provides the option of environmentally and economically attractive coal mining. Obtained syngas can be used for heating, electricity, or chemical production.
Ján Kačur, Marek Laciak, Milan Durdán, Patrik Flegner   +3 more
doaj   +1 more source

Investigation on Coal Pillar Stability between Different Shapes of Gasifier Cavities under High Temperatures during UCG

Geofluids, Volume 2022, Issue 1, 2022., 2022
The shape of the gasifier cavity and the high temperatures induced by underground coal gasification (UCG) have a significant influence on the failure characteristics of the surrounding rock. In this study, the variations in the mechanical properties of the surrounding rock in gasifier cavities subjected to different temperatures (20–700°C) were ...
Yue Shi, Xiaopeng Yun, Jianping Zuo, Zhengdai Li, Yunjiang Sun, Meilu Yu, Dan Ma   +6 more
wiley   +1 more source

The Layout of the Combustion Cavity and the Fracture Evolution of the Overlying Rock during the Process of Underground Coal Gasification

Geofluids, Volume 2022, Issue 1, 2022., 2022
Based on the thermodynamic and elastodynamic theories, the controlling equation of temperature‐stress coupling action on rocks containing random damage units is established by combining the Mogi‐Coulomb damage criterion. And the numerical calculation model of combustion cavity expansion under temperature‐stress coupling condition is established by ...
Zhaolin Li, Lianguo Wang, Bo Ren, Ke Ding, Fazhi Yan   +4 more
wiley   +1 more source

Monitoring of coal fracturing in underground coal gasification by acoustic emission techniques [PDF]

, 2017
During the underground coal gasification (UCG) process, fracturing and cracks occur inside the gasification zone and surrounding rocks as the underground coal cavity evolves.Although fracturing activity and crack extension directly affect gasification ...
Faqiang Su, Gota Deguchi, Ken-ichi Itakura, Koutarou Ohga   +3 more
core   +5 more sources

Effects of water injection on reaction temperature and hydrogen production in horizontal co-axial underground coal gasification. [PDF]

Sci Rep
Underground coal gasification (UCG) is process of directly recovering energy as combustible gases such as hydrogen and carbon monoxide by combusting unmined coal resources in situ. During UCG process, the temperature in the gasification zone can exceed 1,
Iriguchi R, Hamanaka A, Su FQ, Sasaoka T, Shimada H, Itakura KI, Takahashi K, Kodama JI, Deguchi G.   +8 more
europepmc   +2 more sources

Underground coal gasification (UCG) - the Velenje coal mine experience

, 2011
Alenka Zapušek, Gorazd Berčič, Simon Zavšek, Igor Veber, Ludvik Golob, Damjan Konovšek   +5 more
openalex   +3 more sources

A COMPARATIVE LIFE CYCLE ASSESSMENT REVIEW OF CONVENTIONAL PULVERIZED COAL - FIRED ELECTRICITY GENERATION AND UNDERGROUND COAL GASIFICATION (UCG) LINKED WITH AN INTEGRATED GASIFICATION COMBINED CYCLE (IGCC) [PDF]

, 2011
In a global climate where sustainable development is being prioritized for the benefit of current and future generations, it is necessary to make informed decisions about the type of technologies being deployed.
Curtis Enrico Meintjies
openalex   +2 more sources

Effect of High Temperature (600°C) on Mechanical Properties, Mineral Composition, and Microfracture Characteristics of Sandstone

Advances in Materials Science and Engineering, Volume 2020, Issue 1, 2020., 2020
Rock destruction under high‐temperature conditions is a key issue for nuclear waste treatment projects, underground coal gasification, and improvement of the use of geothermal energy for heating. Therefore, in this study, various methods and techniques were integrated to study the changes in mechanical properties, mineral composition, and microscopic ...
Jian Li, Zhao-Wen Du, Zhong-Ping Guo, Fernando Lusquiños   +3 more
wiley   +1 more source