Table 1.
Results of proximate and ultimate analyses of the prepared polyvinyl chloride (PVC) and coal gangue (CG) samples.
Fig 1.
Experimental system diagram.
Fig 2.
Calibration results of experimental system.
Table 2.
Experimental scheme for single-component combustion.
Table 3.
Experimental scheme of co-combustion experiment.
Fig 3.
Thermogravimetry curves of combustion and pyrolysis for coal gangue (CG) and polyvinyl chloride (PVC) in (a) nitrogen and (b) air.
Fig 4.
Differential scanning calorimetry curves of flues in air atmosphere; CG and PVC are coal gangue and polyvinyl chloride, respectively.
Fig 5.
Effect of heating rate on single group combustion.
Table 4.
Combustion characteristic parameters of single combustible.
Fig 6.
Thermogravimetric–differential thermogravimetric–differential scanning calorimetry (TG-DTG-DSC) curves of combustion and pyrolysis of coal gangue.
Fig 7.
Thermogravimetric–differential thermogravimetric–differential scanning calorimetry (TG-DTG-DSC) curve of combustion and pyrolysis of polyvinyl chloride.
Fig 8.
Fitting curves of kinetics of (a) coal gangue and (b) polyvinyl chloride.
Fig 9.
Activation energy curve of coal gangue with different conversion ratios.
Fig 10.
Activation energy curve of polyvinyl chloride with different conversion ratios.
Fig 11.
(a) Thermogravimetric and (b) differential thermogravimetric curves of co-combustion of coal gangue (CG), polyvinyl chloride (PVC), and CG and PVC mixtures with different proportions.
Table 5.
Characteristic parameters upon co-combustion of coal gangue and polyvinyl chloride.
Fig 12.
Effect of coal gangue and polyvinyl chloride (PVC) mixing ratio on ignition temperature (Ti) and burnout temperature (Tf).
Fig 13.
Effect of coal gangue and polyvinyl chloride (PVC) mixing ratio on temperature corresponding to the maximum rate of weightlessness (Tp).
Fig 14.
Comparison of experimental (Exp.) and calculated (Cal.) thermogravimetric (TG) of different coal gangue (CG) and polyvinyl chloride (PVC) mixing ratios: (a) CG80PVC20, (b) CG50PVC50, and (c) CG20PVC80.
Fig 15.
Effect of co-combustion of coal gangue and polyvinyl chloride (PVC) mixtures with different mixing proportions on maximum weightlessness rate (DTGmax).
Table 6.
Comparison of experimental and calculated data for co-combustion of coal gangue (CG) and polyvinyl chloride (PVC).
Fig 16.
Coupling change on co-combustion of coal gangue (CG) and polyvinyl chloride (PVC) mixtures of different proportions.
Table 7.
Numerical calculation of coupling during co-combustion.
Fig 17.
Activation energy fitting curves of 50%:50% coal gangue (CG) and polyvinyl chloride (PVC) mixture.
Fig 18.
Activation energy curves of coal gangue (CG), polyvinyl chloride (PVC), and the mixtures with different conversion ratios.