ขั้นตอนการทดลองPyrolysis investigations were carried out with untreated brown coal and biomass samples within a temperature range between 250 and 700 °C. The increments were set to 50 K in the main decomposition stage. Afterwards the temperature was raised in 100 K steps. For the demineralized samples pyrolysis experiments were run between 300 and 700 °C in 100 K increments. The samples were grinded to a particle size <2 mm and dried at 105 °C until weight constancy. The fixed bed reactor was prepared with 20–30 g of dried sample to reach nearly the same sample volume for each experiment. The furnace preheating temperature was set to a value of 200 K above desired pyrolysis temperature to achieve a high heating rate (45 to 122 K/min in dependence on desired pyrolysis temperature). The same pyrolysis temperatures for different samples result in similar heating rates. After flushing the reactor with Argon to remove air from the system the furnace was pulled over the reactor and the sample was heated up. The furnace was removed slightly before the sample thermocouple inside the reactor reached the desired temperature. The whole system is flushed with a constant Argon stream of 50 ml/min (STP) during the whole test run. After cool down all the parts of the system were detached, weighed, and char as well as liquid product were recovered for further analyses. The experiments at each temperature were carried out once. For selected samples and temperatures the experiments were repeated several times (e.g. WS at 500 °C, 8 times) to test repeatability of the results. In this case the mean values of the experiments are used. The obtained errors within mass balance are in the range of ±2 wt.%.
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