Results 1 to 10 of about 4,265 (165)

Multiscale characterization of microstructural reconfiguration induced by oxidation in lignite from the Lingquan mining colliery [PDF]

Scientific Reports
The microstructure changes of Lingquan mine oxidized lignite at different oxidation temperatures and the influence of low-temperature oxidation on the spontaneous combustion characteristics of lignite is studied in this paper.
Jian Chen, Ying Wen, Baoshan Jia, Xiaopeng Mao, Qinai Zhou   +4 more
doaj   +2 more sources

Monitoring slope stability in surface mines: are low-cost UAVs used for excavated rock volume calculations capable of early detection of displacements? [PDF]

MATEC Web of Conferences, 2022
This paper tries to assess the ability of UAVs equipped with RGB cameras to monitor the stability of the specific slopes in the surface lignite mines of Ptolemaida basin.
Tsachouridis Stefanos, Pavloudakis Francis, Pilalidis Konstantinos, Myronidis Loukas, Roumpos Christos   +4 more
doaj   +1 more source

Macerals of lignite and the effect of alkali treatment on the structure and combustion performance of lignite

Meitan xuebao, 2023
Suppressing the spontaneous combustion of lignite is of great significance for safe transportation and efficient utilization of lignite. Taking the Shengli lignite as the research object, two different macerals, inertinite and huminite, were selected by ...
Yanjun WANG, Yunfei ZHAO, Runxia HE, Huacong ZHOU, Na LI, Yingyue TENG, Yinmin SONG, Quansheng LIU   +7 more
doaj   +1 more source

Study on Structural Evolution of Synthetic Graphite Derived from Lignite Prepared by High Temperature–High Pressure Method

Crystals, 2022
Abundant and cheap lignite is regarded as inferior fuel due to its disadvantages such as low heat and high moisture. In order to realize the high value and clean, non-fuel utilization of lignite, we used lignite as precursor to prepare high-quality ...
Yi-Ming Wang, Chun-Hua Zhang
doaj   +1 more source

Effect of Lignite Properties on Its Suitability for the Implementation of Underground Coal Gasification (UCG) in Selected Deposits

Energies, 2021
Two experimental simulations of underground coal gasification (UCG) processes, using large bulk samples of lignites, were conducted in a surface laboratory setup.
Krzysztof Kapusta
doaj   +1 more source

Evaluation of Methane Production and Mass Loss of Lignite During Promoting Organic Matter Decomposition with Hydrogen Peroxide

Journal of MMIJ, 2021
We proposed a new gasification method that converts unused organic matter in sedimentary rocks to bio methane gas through the use of microorganisms, known as Subsurface Cultivation and Gasification (SCG).
Noritaka ARAMAKI, Takuma MURAKAMI
doaj   +1 more source

Insight into the effect of chemical structure for microbial lignite methanation

Heliyon, 2023
The chemical structure of lignite plays a fundamental role in microbial degradation, which can be altered to increase gas production. In this study, the structural changes in lignite were analyzed by conducting pretreatment and biomethane gas production ...
Lin Yang, Yongfeng Zhang, Zhifei Hao, Junying Zhang   +3 more
doaj   +1 more source

Effect of -O- on Water Molecule Adsorption and Adsorption Mechanism of Lignite and Coke

Journal of Chemistry, 2021
The high moisture content of lignite restricts its extensive and efficient use. Furthermore, the reabsorption of lignite is also a factor that affects lignite spontaneous combustion. Therefore, it is of great importance to study the process and mechanism
Xue Bai, Yue Yin Song, Ying Yue Teng, Wen Lu Zhang, Yin Min Song, Yun Fei Wang   +5 more
doaj   +1 more source

Adsorption behaviors and mechanisms of Cu2+, Zn2+ and Pb2+ by magnetically modified lignite

Scientific Reports, 2022
The study aims to solve the problems of limited capacity and difficult recovery of lignite to adsort Cu2+, Zn2+ and Pb2+ in acid mine wastewater (AMD). Magnetically modified lignite (MML) was prepared by the chemical co-precipitation method.
Junzhen Di, Zhen Ruan, Siyi Zhang, Yanrong Dong, Saiou Fu, Hanzhe Li, Guoliang Jiang   +6 more
doaj   +1 more source

Accelerated Bioconversion of Chemically Solubilized Lignite Solution to Methane by Methanogenic Consortium: Experimental Results and Their Application to the Subsurface Cultivation and Gasification Method

Microorganisms, 2022
Lignite is an obsolete and less commercially circulated natural resource due to its low calorific value worldwide. The effective conversion of lignite into methane is important considering the global energy crunch.
Akio Ueno, Satoshi Tamazawa, Shuji Tamamura, Takuma Murakami, Tamotsu Kiyama, Hidenori Inomata, Noritaka Aramaki, Kunihiko Yoshida, Shinji Yamaguchi, Hideo Aoyama, Takeshi Naganuma, Toshifumi Igarashi   +11 more
doaj   +1 more source