Co-pyrolysis of coal, corn stalks and their blends was studied ultimate analysis of coal pdf a thermobalance. Kinetic parameters are calculated through the DAEM method. The experimental values are compared with the values calculated via the additive model.
The devolatilization index presents inhibitory effects between coal and corn stalks during co-pyrolysis. The results reveal that the thermochemical reactivity of CS is higher than that of coal. The devolatilization indexes for blends are lower than the values calculated from the additive model, indicating that the addition of CS may discourage the volatile release of the blends. MS analysis of tars from the pyrolysis of coal, biomass and their blends has been performed.
No PAHs having more than a five aromatic rings were identified. Benzopyrene, cyclopentapyrene and benzofluoranthene were the largest PAHs identified. Compared to temperature, the biomass ratio of the fuel has a lower influence on tar composition. The analysis shows that naphthalene content is the maximum in all the tar samples irrespective of biomass and coal blend proportion. Samples with high percentages of coal as well as experiments conducted at 1773 K showed the highest concentration of aromatic compounds. Aliphatic hydrocarbons as well as oxygenated hydrocarbons were mostly found in samples containing high percentages of biomass or in experiments conducted at 1573 K. C ratio decreases with pyrolysis temperature.
C ratio reduces as the temperature increases. C ratio of the tars only at lower temperatures. C ratio of the resulting tars. C ratio of the tar. For both switchgrass and pine sawdust, the biomass content of the fuel seems to have no influence on the nitrogen content of the tars. The distribution of sulfur in the tar is inversely proportional to the biomass percentage in the fuel. Check if you have access through your login credentials or your institution.
Moisture is an important property of coal, as all coals are mined wet. Total moisture is analysed by loss of mass between an untreated sample and the sample once analysed. Methods 1 and 2 are suitable with low-rank coals, but method 3 is only suitable for high-rank coals as free air drying low-rank coals may promote oxidation. Inherent moisture is analysed similarly, though it may be done in a vacuum.