Experimental study of the ignition temperatures of low-rank coals using TGA under oxygen-deficient conditions
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Thermal Analysis and Calorimetry"
DOI: 10.1007/s10973-018-7202-2
Abstract: The factors affecting the ignition temperatures of two low-rank coals were experimentally studied using thermogravimetric analysis. The experiments were conducted with coal powders of four different particle size distributions. The thermogravimetric analyzer was operated at… read more here.
Keywords: ignition temperature; rank coals; ignition; low rank ... See more keywords
Quantification of the modes of occurrence of 42 elements in coal
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Coal Geology"
DOI: 10.1016/j.coal.2017.09.005
Abstract: Abstract A series of 20 coal samples were subjected to sequential leaching with ammonium acetate, hydrochloric acid, hydrofluoric acid, and nitric acid to quantify the modes of occurrence of about 42 elements. The results indicate… read more here.
Keywords: occurrence elements; rank coals; modes occurrence; low rank ... See more keywords
Insight into the structural features of low-rank coals using comprehensive two dimensional gas chromatography/time-of-flight mass spectrometry
Sign Up to like & getrecommendations! Published in 2018 at "Fuel"
DOI: 10.1016/j.fuel.2017.10.044
Abstract: Abstract Detailed characterization of organic components in low-rank coals is essential for the utilization of coals in clean, effective and value-added ways. Two kinds of low-rank coals were subjected to sequential thermal dissolution in the… read more here.
Keywords: gas chromatography; mass spectrometry; rank coals; gas ... See more keywords
Drying characteristics of low rank coals in a pressurized flash drying system
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Industrial and Engineering Chemistry"
DOI: 10.1016/j.jiec.2017.08.017
Abstract: Abstract Drying characteristics of low rank coals were examined and determined using a pressurized flash drying system which consisted of a pressurized feeder, rolled tubes (maximum of 6 m), a cyclone, and a back pressure regulator.… read more here.
Keywords: flash drying; rank coals; pressurized flash; drying characteristics ... See more keywords
An updated study on CH4 isothermal adsorption and isosteric adsorption heat behaviors of variable rank coals
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Natural Gas Science and Engineering"
DOI: 10.1016/j.jngse.2021.103899
Abstract: Abstract: Understanding the gas sorption behavior of coals not only benefits for enhancing coalbed methane (CBM) recovery but also provides important insights for simultaneous coal and gas extraction. This study aims to quantitatively evaluate the… read more here.
Keywords: ch4 adsorption; heat; rank coals; adsorption ... See more keywords
Critical pore size for micropore filling in coal samples with different rank coals
Sign Up to like & getrecommendations! Published in 2022 at "PLoS ONE"
DOI: 10.1371/journal.pone.0264225
Abstract: The objectives of this study were to explore the occurrence and migration of coalbed methane in coals of different ranks and reveal the microscopic reservoir space and the mechanism of coalbed methane. To meet these… read more here.
Keywords: rank coals; critical pore; coal; micropore filling ... See more keywords
Cluster Analysis of Soluble Organic Fractions in Two Low-Rank Coals
Sign Up to like & getrecommendations! Published in 2022 at "Applied Sciences"
DOI: 10.3390/app122211562
Abstract: A brief overview of the composition and structure of soluble organic compounds as well as organic macromolecules in coal is sufficient to support the development of the coal chemical industry and realize the clean, effective,… read more here.
Keywords: rank coals; cluster analysis; extraction; low rank ... See more keywords