Investigation of the Thermokinetic Characteristics during Combustion of Pyrolysis Semi-Coke from Non-Stick Coal
Xi'an University of Science and Technology
Abstract
For semi-coke initially decreases and subsequently increases with rising pyrolysis temperature. It reaches the minimum at 500 °C. The reaction mechanisms of raw coal and semi-cokes pyrolyzed at 300 and 400 °C respectively correspond to spherically symmetrical phase boundary reactions, spherically symmetrical three-dimensional diffusion, and reaction orders. The semi-coke pyrolyzed at 500 and 600 °C belongs to the random nucleation and subsequent growth. From the microscopic perspective, as semi-coke pyrolysis temperature increases, the critical functional groups affecting the decomposition/combustion reaction transform from aliphatic hydrocarbons to oxygen-containing functional groups and then to aromatic…
Citation impact
- FWCI
- 45.37
- Percentile
- 100%
- References
- 37
Authors
9Topics & keywords
- Pyrolysis
- Coal
- Combustion
- Nucleation
- Kinetic energy
- Activation energy
- Raw material
- Heat of combustion