A5079102492- Coal Properties and Utilization
- Thermochemical Biomass Conversion Processes
- Fire dynamics and safety research
- Combustion and Detonation Processes
- Hydrocarbon exploration and reservoir analysis
- Coal and Its By-products
- Geoscience and Mining Technology
- Thermal and Kinetic Analysis
- Safety and Risk Management
- Coal Combustion and Slurry Processing
- Geophysical Methods and Applications
- Geomechanics and Mining Engineering
- Coal and Coke Industries Research
- Earthquake Detection and Analysis
- Combustion and flame dynamics
- Heme Oxygenase-1 and Carbon Monoxide
- Zeolite Catalysis and Synthesis
- Polymer composites and self-healing
- Mining and Gasification Technologies
- Advanced Algorithms and Applications
- Rock Mechanics and Modeling
- Spectroscopy and Chemometric Analyses
- Fire Detection and Safety Systems
- Underground infrastructure and sustainability
- Flame retardant materials and properties
China University of Mining and Technology
2015-2024
Henan Polytechnic University
2021-2023
Dalian University of Technology
2021
University of Science and Technology
2021
Pennsylvania State University
2016-2019
Gheorghe Asachi Technical University of Iași
2013
Xuzhou University of Technology
2010
The extinction coefficient differs for different functional groups making the quantitative analysis of their infrared spectra problematic. Although coefficients some have been researched previously, they are inaccurate because deviations in techniques used and linear fitting. distribution structural characteristics from coal is therefore inaccurate. In this study, quantum chemistry methods quantification based on Beer–Lambert law. effect eliminated. experimental intensities, unit absorption...
This study measured the adsorption heat for five groups of Chinese coal samples different ranks at 15 °C and 0.101 MPa using a C80 microcalorimeter. The functional were determined by infrared spectroscopy according to quantum chemical theory. effects coalification on methane discussed in terms energy. As result, this has further perfected theory bed methane. results show that first increases, then decreases with increasing rank reaches minimum fat stage. indicates significant effect...
The distribution of functional groups in two different rank coal samples and their real-time changes during the oxygen-free reaction were tested. An situ FTIR system was designed to test reaction. aliphatic hydrocarbon oxygen-containing analyzed using method. results show that are various for ranks coals. quantity active low-rank coals is larger than high-rank For anthracite sample, quantities increase with rise temperature. lignite carbon decreases from 30 70 °C, then increases temperature...
ABSTRACT The remarkable differences between the infrared spectra of oxygen adsorption and nitrogen desorption in coal have been experimentally theoretically investigated. Density functional theory calculations were performed to better explain mechanism using six different molecular models coal. In addition, was defined as index V, which used classify spontaneous combustion tendency experimental data indicated that 4000–2000 cm−1 1250–1050 regions exhibited significant changes. These results...
ABSTRACT This study details an in situ Fourier transform infrared spectroscopy analytical system that was employed to follow chemical variations the functional groups on coal surface during oxidation process at low temperatures. In reported system, a special chamber used contain powders, and gas inlet tube programmable heater were simulate different reaction atmospheres The comparisons between ex spectra indicate data offer more accurate reflection of changes groups. real-time aliphatic...
Hydroxyl groups are one of the key factors for development coal self-heating, although their detailed reaction pathways still unclear. This study investigated in self-heating by method quantum chemistry calculation. The Ar–CH 2 –CH(CH 3 )–OH was selected as a typical structure unit results indicate that hydrogen atoms hydroxyl and R –CH active sites. For groups, they directly abstracted oxygen. –CH, oxygen at first generate peroxy-hydroxyl free radicals, which abstract later. contains three...
Abstract Carboxyl groups play an important role during the development of coal self-heating. The real-time changing characteristics carboxyl were obtained using in situ Fourier Transform Infrared Spectroscopy method. They are significantly influenced by reaction atmospheres. Under dry-air atmosphere, their quantity obviously decreases before reaching 120°C and then increases with temperature rise. oxygen-free it 80°C In contrast direct oxidation process, is smaller decrease phenomenon at...