Efficient Use of Low Rank Coal: Current Status of Low Rank Coal Utilization

2012 ◽  
pp. 893-895 ◽  
Author(s):  
Sihyun Lee ◽  
Sangdo Kim ◽  
Hokyung Choi ◽  
Donghyuk Chun ◽  
Younjun Rhim ◽  
...  
Keyword(s):  
Low Rank ◽  
Current Status ◽  
Low Rank Coal

Low-Rank Coal Drying Technologies—Current Status and New Developments

2009 ◽  
Vol 27 (3) ◽  
pp. 403-415 ◽  
Author(s):  
Muthusamy Karthikeyan ◽  
Wu Zhonghua ◽  
Arun S. Mujumdar
Keyword(s):  
Low Rank ◽  
Current Status ◽  
Low Rank Coal ◽  
New Developments ◽  
Coal Drying

scholarly journals Fluid bed drying as upgrading technology for feasible treatment of Kolubara lignite

2016 ◽  
Vol 20 (suppl. 1) ◽  
pp. 167-181
Author(s):  
Milic Eric ◽  
Milan Stakic ◽  
Milos Banjac
Keyword(s):  
Packed Bed ◽  
Low Rank ◽  
Current Status ◽  
Low Rank Coal ◽  
Two Phase ◽  
Specific Data ◽  
Fluid Bed ◽  
Intraparticle Mass Transfer ◽  
Coal Drying ◽  
Transfer Mechanisms

An overview of the current status of low-rank coal upgrading technologies is presented in the paper, particularly with respect to drying and dewatering procedures. In order to calculate the significant parameters of the moisture removal process, a model of convective coal drying in a fluid bed, based on the two-phase (bubbling) fluidization model proposed by Kunii and Levenspiel, is developed and presented. Product-specific data (intraparticle mass transfer, gas-solid moisture equilibrium) related to the particular coal variety addressed here (Kolubara lignite) are obtained through preliminary investigations. Effective thermal conductivity of the packed bed as defined by Zehner/Bauer/Schl?nder is used to define heat transfer mechanisms occurring in the suspension phase of the fluid bed. A completely new set of experimental data obtained has been successfully used to validate the model additionally.

INVESTIGATING A LINK BETWEEN LOW-RANK COAL BEARING CARRIZO-WILCOX AQUIFER WATER AND KIDNEY DISEASE IN EAST TEXAS

2018 ◽  
Author(s):  
Jayeeta Chakraborty ◽  
◽  
Robert B. Finkelman ◽  
William H. Orem ◽  
Matthew S. Varonka ◽  
...  
Keyword(s):  
Kidney Disease ◽  
Low Rank ◽  
East Texas ◽  
Low Rank Coal

scholarly journals Surface Chemical Heterogeneity of Low Rank Coal Characterized by Micro-FTIR and Its Correlation with Hydrophobicity

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 239
Author(s):  
Wei Wang ◽  
Long Liang ◽  
Yaoli Peng ◽  
Maria Holuszko
Keyword(s):  
Surface Chemistry ◽  
Functional Group ◽  
Group Composition ◽  
Contact Angles ◽  
Low Rank ◽  
Surface Chemical ◽  
Carbonyl Groups ◽  
Low Rank Coal ◽  
Different Types ◽  
Aliphatic Carbon

Micro-Fourier transform infrared (micro-FTIR) spectroscopy was used to correlate the surface chemistry of low rank coal with hydrophobicity. Six square areas without mineral impurities on low rank coal surfaces were selected as testing areas. A specially-designed methodology was applied to conduct micro-FTIR measurements and contact angle tests on the same testing area. A series of semi-quantitative functional group ratios derived from micro-FTIR spectra were correlated with contact angles, and the determination coefficients of linear regression were calculated and compared in order to identify the structure of the functional group ratios. Finally, two semi-quantitative ratios composed of aliphatic carbon hydrogen, aromatic carbon hydrogen and two different types of carbonyl groups were proposed as indicators of low rank coal hydrophobicity. This work provided a rapid way to predict low rank coal hydrophobicity through its functional group composition and helped us understand the hydrophobicity heterogeneity of low rank coal from the perspective of its surface chemistry.

Transformation of low-rank coal to clean syngas and power via thermochemical route

Energy ◽  
2021 ◽  
pp. 121505
Author(s):  
Muflih A. Adnan ◽  
Arif Hidayat ◽  
Mohammad M. Hossain ◽  
Oki Muraza
Keyword(s):  
Low Rank ◽  
Low Rank Coal
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