The Effect of Feeding of Raw Material on Gas Characteristics During Thermal Decomposition

Nagy, Gábor (2021) The Effect of Feeding of Raw Material on Gas Characteristics During Thermal Decomposition. Materials Science and Engineering, 46 (1). pp. 54-62. ISSN 2063-6792

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Abstract

Pyrolysis and gasification are thermochemical processes that have gained signifi-cant attention in the past decades. During pyrolysis, numerous parameters can affect the final solid, liquid and gaseous products. The pyrolysis of oak wood samples at 700 °C with three different feeding times were carried out under laboratory conditions. The gas yield was the highest with the use of the lowest feeding speed (11.5 min residence time), resulting in over 20% increase in the quantity of produced gas. Faster feeding speed results in shorter residence time in the heated zone, hindering the degradation of hydrocarbon. The LHV recorded at all experiments are applicable for energy purposes. On the other hand, due to the low H2/CO ratios (<1), none of the experiments produced syngas usable for the chemical industry.

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