Results 131 to 140 of about 335,851 (308)

Study on the Synergistic Effects and Optimization of Flotation Reagent Blends Under Low Reagent Consumption

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT Under low reagent dosage, the flotation performance of diesel as a collector was enhanced, and the synergistic mechanism of diesel blended with oleic acid and CTAB was investigated. Results showed that compared to pure diesel, the oleic acid blended system (Blend A) increased clean coal yield by 81.52% to 92.24%, while the CTAB blended system (
Rui Shen, Wei Zhou, Huanhuan Shang
wiley   +1 more source

BGS Distribution Deformation in BOTDR Induced by Self-Phase Modulation

Photonic Sensors
We report the numerical and experimental studies of the two-dimensional Brillouin gain spectrum (BGS) distribution deformation induced by the self-phase modulation in the Brillouin optical time domain reflectometry (BOTDR) with a 20.6 km sensing distance.
Haoting Wu, Wencun Guo, Zixuan Zhong, Guolu Yin, Tao Liu, Tao Zhu   +5 more
doaj   +1 more source

Geochemical characteristics and genesis of element enrichment of niobium-rich-rare earth metal layer in Longtan Formation of Zhina coalfield

Meitian dizhi yu kantan
BackgroundWith the increasing demand for strategic metals and the gradual depletion of traditional metal deposit resources, coal and coal-bearing rock series are considered to be potential sources of rare metals, and coal series associated has become one
Yunlong DING, Fangfa WANG, Bi LI, Lifang TANG, Yi YANG, Shangyuan LI, Xiaofang WANG, Yinhong ZOU, Yang WANG   +8 more
doaj   +1 more source

Lowther, Edgar M., 1916-1973 (SC 2179) [PDF]

, 2010
Finding aid only for Manuscripts Small Collection 2179. By-laws for Local Union No. 862, Madisonville, Kentucky, of the United Mine Workers (n.d.); copy of an agreement between the Western Kentucky Coal Operators\u27 Association and UMW members, 1939 ...
Folklife Archives, Manuscripts &
core   +1 more source

Performance Investigation of Eco‐Friendly Refrigerant Mixtures as an Alternative to R134a in Vapour‐Compression Refrigeration System

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT The growing impacts of climate change and energy scarcity demand environmentally sustainable refrigeration solutions. This study investigates eco‐friendly refrigerants (R152a, R290 and R600a) and their optimized ternary mixture as alternatives to R134a. Four blend compositions were analysed using experimental testing and REFPROP 10.0 modelling
M. Periyasamy, P. Senthilkumar
wiley   +1 more source

Study on the Fragmentation Characteristics and Dust Generation Mechanism of Coal Cutting by Pick

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT During underground excavation, coal dust generation threatens miners' health and damages ecosystems. Its generation is directly influenced by cutting pick performance and inherent coal properties. This study investigates the effects of coal properties and cutting parameters on coal fragmentation characteristics from a mesoscopic perspective ...
Shihang Li, Delong Li, Bohan Gao, Xingyue Chen, Hao Jin, Shuda Hu, Qiang Zhang, Wuping Peng, Ping Li, Jianping Li, Xuegang Wang   +10 more
wiley   +1 more source

Denoising method and application of microseismic signals for coal seam hydraulic fracturing based on deep neural network mode

Meitan xuebao
To address the challenges of low signal-to-noise ratio and difficulty in phase picking of microseismic signals induced by coal fracturing during hydraulic fracturing in coal seams, a deep neural network model based on a masking strategy is proposed (Mask
Quangui LI, Yulong ZHAO, Qianting HU, Yunpei LIANG, Wanjie SUN, Wenxi LI, Jinfei ZHAN, Jiangfu HE, Kun HE, Haiyu CHEN   +9 more
doaj   +1 more source

Analytical assessment of mine water rebound. Case study Ruhr coal basin [PDF]

, 2018
This study aims to assess key factors that influence mine water rebound on the example of a large amount of hard coal mines flooded or being flooded in Europe. Three German mines have been selected for a detailed study.
Melchers, Ch., Rudakov, D., Westermann, S., Рудаков, Д. В., Рудаков, Дмитрий Викторович   +4 more
core  

Design and Optimization of a Novel Kalina‐Organic Rankine Cycle System Based on LNG Cold Energy Utilization

Asia-Pacific Journal of Chemical Engineering, EarlyView.
ABSTRACT This study proposes a novel integrated system (SDKC‐DORC) that combines a split‐flow dual‐pressure Kalina cycle with a secondary organic Rankine cycle for the synergistic utilization of solar energy and liquefied natural gas (LNG) cold energy.
Ke Xiao, Kun Wang, Wenquan Jiang, Fan Yang, Changshun Wang, Chengjie Su, Junjie Liu   +6 more
wiley   +1 more source

Image-based quantitative probing of 3D heterogeneous pore structure in CBM reservoir and permeability estimation with pore network modeling

International Journal of Coal Science & Technology
Coalbed methane (CBM) recovery is attracting global attention due to its huge reserve and low carbon burning benefits for the environment. Fully understanding the complex structure of coal and its transport properties is crucial for CBM development. This
Peng Liu, Yulong Zhao, Zhengduo Zhao, Huiming Yang, Baisheng Nie, Hengyi He, Quangui Li, Guangjie Bao   +7 more
doaj   +1 more source