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This study focuses on the effects of interactions among bio-oil components on the formation of aromatic structures of bio-oil during its thermal treatment processes at various temperatures and heating rates. A bio-oil sample and its extracted fractions were pyrolyzed in a fixed-bed reactor at 300–800 °C at different temperatures and heating rates. The results show that the pyrolytic products (including...
A comprehensive model accounting for intraparticle heat and mass transport phenomena, primary and secondary reaction processes was developed. Mass loss history, particle surface temperature history, and volatile product distribution of oil shale particles at different pyrolysis temperatures were favorably compared with experimental data. Particle size and reactor temperature would affect temperature...
Zhundong coal is one of the most important coals in China due to its huge reserve, but it causes severe fouling and slagging problems when it is burnt in boilers for its high AAEMs (alkali and alkaline earth metal species) contents. Accurately determination of the occurrence modes and contents of AAEMs in Zhundong coals is a necessary step to overcome the ash-related problems. Nowadays, different...
A mixing model for the calculation of laminar flame speed of lean premixed H2/CO fuel blends was derived through asymptotic analysis coupled with a reduced chemistry mechanism. The model was developed following the similar procedure given for the single component fuel. According to the different dominant effects of H2 in H2/CO/air flame, two separated algebra formulas were given when H2 content was...
An experimental study was performed to examine the ashing process during straw/coal co-combustion to determine the effect of the blending ratio on ash products. A total of eleven blending samples with coal contents varying from 5wt.% to 90wt.% along with pure wheat straw and pure coal samples were tested to determine the ash fusion points, oxide contents and mineral contents. Blends with coal contents...
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