Results 41 to 50 of about 70,675 (262)

Comparison Analysis of Coal Biodesulfurization and Coal’s Pyrite Bioleaching with Acidithiobacillus ferrooxidans [PDF]

The Scientific World Journal, 2013
Acidithiobacillus ferrooxidans (A. ferrooxidans) was applied in coal biodesulfurization and coal’s pyrite bioleaching. The result showed that A. ferrooxidans had significantly promoted the biodesulfurization of coal and bioleaching of coal’s pyrite. After 16 days of processing, the total sulfur removal rate of coal was 50.6%, and among them the removal
Fen-Fen Hong, Huan He, Jin-Yan Liu, Xiu-Xiang Tao, Lei Zheng, Yi-Dong Zhao   +5 more
openaire   +3 more sources

SpatialESD: Spatial Ensemble Domain Detection in Spatial Transcriptomics

Advanced Science, EarlyView.
ABSTRACT Spatial transcriptomics (ST) measures gene expression while preserving spatial context within tissues. One of the key tasks in ST analysis is spatial domain detection, which remains challenging due to the complex structure of ST data and the varying performance of individual clustering methods. To address this, we propose SpatialESD, a Spatial
Hongyan Cao, Gaiqin Liu, Jingyi Xia, Runle Chen, Tong Wang, Xiaoling Yang, Ruiling Fang, Yanhong Luo, Ping Zeng, Hongmei Yu, Yanbo Zhang, Yuehua Cui   +11 more
wiley   +1 more source

Comparative Analysis of Domestic Production and Import of Hard Coal in Poland: Conclusions for Energy Policy and Competitiveness

Energies
In many energy policies, including Poland’s, environmental priorities clash with the issue of energy security. With these contradictions in mind, the main objective of the article is a comparative analysis of domestic production and imports of hard coal ...
Izabela Jonek-Kowalska, Wieslaw Grebski
doaj   +1 more source

Evaluation of top coal cavability based on PCA-FDA model

矿业科学学报, 2018
In order to evaluate top coal cavability reasonably, and determine whether coal seam is suitable for top-coal caving.The top coal cavability evaluation model (PCA-FDA) was established by combining principal component analysis(PCA) and Fisher ...
Xue Liming, Zheng Zhixue, Su Chao, Li Changming, Liu Baokang, Li Hongliang   +5 more
doaj   +1 more source

Liquid Bismuth Catalyst Enables High‐CO‐Selectivity in CO2 Hydrogenation

Advanced Science, EarlyView.
This work introduces a dynamic liquid bismuth catalyst for efficient CO2‐to‐syngas conversion. Stabilized molten Bi nanodroplets on a defective VOx support enable a reversible Bi3+/Bi0 redox cycle at moderate temperatures. Mechanistic insights reveal that Ni‐Bi dual sites synergistically activate H2 and cleave CO2, leading to high CO selectivity ...
Xinxin Lu, Zun Guan, Xinyi Fu, Bin Chen, Zhongliang Huang, Riguang Zhang, Guowu Zhan   +6 more
wiley   +1 more source

Effect of some operational parameters on desulphurization of high sulphur Indian coal by KOH leaching

Energy Exploration & Exploitation, 2018
This paper presents an experimental study on the effect of potassium hydroxide concentration and reaction time on coal properties during desulphurization of high sulphur Indian coal. Experimental results showed that maximum of 36.79% of total sulphur can
Bhupendra S Ken, Barun K Nandi
doaj   +1 more source

Determination of Water-Proof Coal (Rock) Pillar Height in Mining Coal Seam Group under Water-Bearing Rock Stratum

Shock and Vibration, 2021
In order to determine the reasonable height of water-proof coal (rock) pillar when mining multiple coal seams under aquifer, this paper analyzes the expansion height of water-conducting fracture zone when coal seams mining.
Feng Wan, Hongqing Zhang, Peijun Zhou, Jie Guo   +3 more
doaj   +1 more source

Structural Analysis of Coal and Coal-derived Oil.

Journal of The Japan Petroleum Institute, 1992
核磁気共鳴法と質量分析法による, 石炭および液化油の構造解析法について概説した。固体高分解能CP/MAS13C-NMRは石炭の炭素分布の直接測定を可能にし, その構造特性を明らかにした。石炭の炭素と酸素分布に基づいて算出した構造単位の構造指数から, 低石炭化度炭の平均芳香族環数は1～3環, 高石炭化度炭のそれは3～5環であることが示された。また, 石炭の低温空気酸化と加熱処理による化学構造の変化およびその反応特性を調べた結果, いずれもメチレン基炭素の著しい減少が見られた。一方, 液化油の分析には, 溶液13C-NMR法による平均構造解析法と, FI-MS法による構造分布解析法が有効であった。13C-NMR法では, 芳香族部分の炭素分布から平均化学構造の構造指数が直接求められ, 1H ...
openaire   +2 more sources

Combining Electrochemical Reduction with Biosynthesis for Directed Conversion of CO2 into a Library of C3 Chemicals

Advanced Science, EarlyView.
In the H‐type electrolytic cell, carbon dioxide is reduced to acetic acid via electro‐microbial catalysis. The simply processed acetic acid is further converted through biological fermentation into high‐value‐added products, including acrylic acid, L‐lactic acid, and β‐alanine.
Kaixing Xiao, Shanquan Liang, Xujun Zhao, Zhiyao Peng, Ruoshi Luo, Jikai Zong, Ling Zhou, Yude Su, Dan Wang   +8 more
wiley   +1 more source

Research on the characteristics of the falling behavior of mixed coal and gangue

Gong-kuang zidonghua
Traditional studies on the dynamic characteristics of coal flow during the top coal caving process, based on image detection technology, have primarily focused on specific-stage image analysis, lacking a comprehensive analysis of dynamic characteristics ...
SHAN Pengfei, YANG Tong, SUN Haoqiang, XI Bojia   +3 more
doaj   +1 more source