Abstract
The hydropyrolysis of rice husk was carried out in a fluidized-bed reactor. To determine the optimal condition for the bio-oil yield and investigate the effects of an inexpensive nickel-loaded Loy Yang brown coal (Ni/LY) char activity on the product yield and composition, the non- catalytic hydropyrolysis was tested under different reaction conditions (gas flow rate, static bed height, and temperature). The maximum bio-oil yield of 47.06% was obtained at a gas flow rate of 2 L/min, a static bed height of 5 cm, and a temperature of 500 °C. In the presence of the catalyst, the bio-oil yields markedly reduced, while the gas yield and water content showed an opposite trend. The influence of the catalyst was to convert the oxygen content in bio-oil to the formation of H2O, CO, and CO2. The oxygen content of bio-oils decreased, whereas the higher heating value of bio-oils increased when increasing the volume fraction of Ni/LY char. The bio-oil with the lowest oxygen content (20.7 wt %) and the highest heating v...
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