CO 2 gasification of char from seven European and Indian biomass species. Samples compared under methodology replicating fixed-bed gasification. Results exhibit thermolysis as predicted by random pore model. Coconut coir and jute highest reactivity. Sugar Bagasse similar kinetics to woody European species. a b s t r a c t A standardised method for studying the kinetics of CO 2 gasification was applied to seven different biomass species from Europe and Asia. The aim was to gain a truer understanding of variations in feedstock behaviour inside fixed bed biomass gasifiers. Slow heating rates and fixed variable in-situ pyrolysis was followed by gasification at isothermal temperatures from 800 1C to 950 1C. There was closer similarity in reactivity between all species in the region of 900r1C r950 suggesting that these temperatures could be optimal for the design of generic gasifier settings. Values of activation energy were in the range of 159 rkJ mol À 1 r216 for European arboreal species plus Sugar Bagasse. Coconut Coir and Jute had CO 2 gasification characteristics that were distinct from the other species (lower activation energy and higher reactivity), particularly at lower temperatures of 800r 1C r 875. CO 2 gasification thermolysis was found to develop as predicted by the theoretical random pore model; and a unique episode of ultra-low temperature devolatisation was observed during pyrolysis of Sugar Bagasse samples.
The present research work deals with the thermogravimetric analysis (TGA) and kinetic analysis of three typical Indian low rank coals selected from Indian coal mines at various temperature ranges. Experiments were performed at four different heating rate (50, 100, 150, 200 K/min) for three typical Indian low rank coal samples in a nitrogen atmosphere from temperature range 30-950°C. The peak of temperature and mass loss for Indian low rank coal were evaluated. Current study also deals for the utilization and the behaviour of Indian low rank coal during the pyrolysis by using TGA. The activation energy for Indian low rank coal were calculated based on TGA data by using Friedman Method. Corresponding calculated mean value of activation energy for Indian low rank coal is found 49.132 kJ/mol. These experimental results help to explain and predict the behaviour of Indian low rank coal in practical applications.
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