Results 41 to 50 of about 1,442,809 (311)

Engineering Oxygen Vacancy in Support to Promote Activity of In2O3 Catalyst for CO2 Electroreduction to Formate

Advanced Functional Materials, EarlyView.
A novel approach by depositing In2O3 onto an oxygen vacancy (OV)‐enriched support, ceria‐zirconia solid solutions (CZ), to activate synergistic effects is proposed. The OV contributes greatly to the dissociation of H2O and further promotes the hydrogenation of adsorbed CO2 species.
Ruirui Qi, Manfen Liang, Zhichao Miao, Haimei Xu, Yunzhao Fan, Jinglin Mu, Weisong Feng, Lechen Diao, Jin Zhou, Xiaoning Li, Tianyi Ma   +10 more
wiley   +1 more source

Using geophysical density logging to estimate the thickness and density of coal seams in the Southern region of Brazil [PDF]

REM: International Engineering Journal
This study shows the usefulness of borehole geophysical logging of density in the identification of coal seams, in relation to other lithologies present in a coal deposit located in the south of Brazil. Four drillholes were studied.
Barbara Victoria Reffatti Andrade, Paulo Salvadoretti, Luciana Arnt Abichequer, George Olufunmilayo Gasper, Luis Eduardo de Souza   +4 more
doaj   +1 more source

Financial Risks of Investments in Coal [PDF]

, 2011
Analyzes the regulatory, commodity, and construction risks of investing in coal mining and coal-fired power plants. Examines industry analysts' consensus on viable alternatives to coal, including natural gas, solar, wind, and energy ...
Amy Galland, Leslie Lowe, Tom Sanzillo
core  

Cat‐Vibrissa‐Inspired Biomass Fiber Aerogels for Flexible and Highly Sensitive Sensors in Monitoring Human Sport

Advanced Functional Materials, EarlyView.
Inspired by cat vibrissae, biomimetic biomass PHFs/SA aerogels (BFAs) are developed via precursor‐assisted in situ polymerization and freeze‐synergistic assembly. These ultralight, porous pressure sensors exhibit high sensitivity and excellent durability, enabling pulse detection, handwriting recognition, Morse code transmission, and notably real‐time ...
Dandan Xie, Ziwei Chen, Daoxiong Qian, Jian Shi, Wei Zhang, Hideaki Morikawa, Chunhong Zhu   +6 more
wiley   +1 more source

Study on the evolution law of acoustic emission time series characteristics of coal-rock assemblage under true triaxial conditions

Frontiers in Earth Science
IntroductionThis study aims to investigate the fractal characteristics of acoustic emission (AE) signals during coal-rock rupture and their predictive significance for impact dynamic hazards.MethodsTrue triaxial loading/unloading tests were conducted on ...
Fuquan Gao, Chenyang Zhang, Chenyang Zhang, Lingchen Han, Yongxue Xia, Yongxue Xia, Quanwu Gao, Yiqun Zhou, Yiqun Zhou, Dingyi Li, Dingyi Li   +10 more
doaj   +1 more source

Tools available for methane recovery from mines belonging to C.E.H. Petroşani [PDF]

MATEC Web of Conferences
Mine gas is present both in coals and in the surrounding rocks and basically consists of methane (some-times almost 100%) mixed with carbon dioxide (up to 5%) with nitrogen (a few percent) and traces of carbon monoxide.
Chiuzan Emeric, Matei Adrian
doaj   +1 more source

Experimental study on resistivity and electromagnetic radiation of coal under uniaxial compression

Journal of Applied Science and Engineering, 2022
In order to study the response of resistivity and electromagnetic radiation at different stages of deformation and failure of loaded coal, the real-time measurement system of acoustic emission, electrical parameters and electromagnetic radiation of ...
Penghong Fan, Baisheng Nie
doaj   +1 more source

Characterization and washability studies of raw coal from the Little Tonzona Field, Alaska [PDF]

, 1991
Coal occurs in an isolated exposure of Tertiary, non-marine sedimentary rocks along the southwest bank of the Little Tonzona River, near Farewell, Alaska. The Little Tonzona River coal field is located approximately 150 air miles northwest of Anchorage,
Charlie, K.G., Phillips, N., Rao, P.D., Walsh, D.E.   +3 more
core  

Bipolar Hydrogen Production by Hybrid Water Electrolysis

Advanced Functional Materials, EarlyView.
This review focuses on the recent advances in uniqueness bipolar H2 production from the oxidation of representative small molecules, including 5‐hydroxymethylfurfural, formaldehyde, alcohols, and N‐heterocycle amides. The target electrocatalysts and the underlying mechanisms are discussed in respect to specific substrate oxidation.
Jiachen Li, Ting Zhang, Yuqiang Ma, Zihang Zhao, Haixia Ma, Zhengxiao Guo   +5 more
wiley   +1 more source

MANAGEMENT OF SUSTEINABLE DEVELOPMENT AND ECONOMIC REVIVAL OF MINING AREAS AFFECTED BY RESTRUCTURING [PDF]

Analele Universităţii Constantin Brâncuşi din Târgu Jiu : Seria Economie, 2013
Sustainable development of an area or region, as a process of change, of economic and jobs development, entails, in the context of what it summarizes through the dualism: ecosystem-ecoeficiency, community concern over the current and future situation of ...
Valeriu Pleşea, Marius Eremia Vlaicu Popa, Ciprian Nimară   +2 more
doaj