Results 1 to 10 of about 469,716 (286)
Effect of Pre-oxidation on Coal Specific Surface Area and Pore Size Distribution
Meikuang Anquan, 2020 In order to explore the micro structure variation features of coal after pre-oxidation, the liquid nitrogen adsorption experiment was adopted to measure the specific surface area and pore structure of Liujia lignite, Sitai lignite, Tongxin bituminous ...
SUN Yong
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Meikuang Anquan, 2022 Deep mining in Shaanxi and Inner Mongolia mining areas is characterized by high mine pressure and high degree of broken coal. Leaving narrow coal pillars is easy to cause side air leakage along goaf, and the coal left in the adjacent gob will undergo ...
WU Jianbin +5 more
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Exploring weathered and oxidized zones of coal seams using the transient electromagnetic method
Energy Exploration & Exploitation, 2022 Once a coal seam has been weathered and oxidized, the quality of the coal is lost and the coal resources are wasted. At the same time, new risks are introduced to the safe operation of the coal mine.
Yang Yang +5 more
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Gong-kuang zidonghua, 2023 In view of the problem of coal spontaneous combustion and re-ignition by reducing the oxidation of coal with inert gas, most of the existing studies are related to the coal low-temperature oxidation process and the coal re-ignition process.
WANG Qingguo +4 more
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Research on exothermic and kinetic characteristics of low-temperature oxidation of preoxidized coal
Gong-kuang zidonghua, 2022 The existing research on the spontaneous combustion characteristics of oxidized coal is mostly based on the coal samples prepared under the conditions of lower oxidation temperature and air. It lacks the analysis of the kinetic characteristics during the
YAN Guofeng, HUANG Xingli, YAN Zhenguo
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Coal structure in the oxidation
Физик сэтгүүл, 2022 In the current paper we present the experimental results of Nuurstkhotgor coals in the original (as received) and with low temperature treatment and compared those experimental with the theoretical ones for the observing coal molecule structure specifics in the oxidation. Three groups of the paramagnetic centres are responsible for one narrow Lorentz 1
Munkhtsetseg S, Munkh-Orchlon B
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Journal of the Fuel Society of Japan, 1958 石炭の酸化に関する研究は石炭の化学構造を明らかにすると共に酸化生成物を化学工業原料にしようとする点でこれまで大きな貢献をなしてきた。本報は石炭の酸化に関する最近までの知見をごく簡単に最り纒めたもので, 主として石炭の酸化崩壊過程, 石炭の化学構造, 石炭より芳香族有機酸の工業的製法に関し著者自身の興味深い見解が示されている。とくに再生フミン酸の化学構造に関し, 1つの構造模型が提出され, その分子量は3, 000～4, 000, 分子式は(C33H24O10N1.5S0.1) x=5～7である。
Chikao Yokokawa, Shigeru Kajiyama
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Meikuang Anquan, 2020 To study the effect of pre-oxidation on the limit parameters of coal spontaneous combustion, the primary oxidation and secondary oxidation processes of coal are simulated by the program heating device, the oxygen consumption rate, gas productivity ...
WANG Kai, HE Yunzhong, SHANG Bo
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Coal oxidation and calcium loading on oxidized coal
Fuel Processing Technology, 1996 Abstract A Pittsburgh No. 8 coal, and two IBC (Illinois Basin Coal) 101 and 112 coals were oxidized in a 2 1 Parr Stirred Bench Top Reactor. The oxidation time was varied up to 5 h; the temperature from 150°C to 225°C, the oxygen pressure from 100 to 600 psi, and coal dosage from 15 to 60 g in 600 ml of distilled water.
Eung Ha Cho, Qiuliang Luo
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Effect of gas on microstructure and thermal reactivity of coal during low temperature oxidation
Meitan kexue jishu, 2023 In order to investigate the microscopic physicochemical properties and macroscopic coal-oxygen complex thermal effects in the low-temperature oxidation of coal under gas atmosphere, different metamorphic coal and secondary oxidized coal samples as ...
DENG Jun +4 more
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