362 / 2018-07-31 11:18:16

Conversion of Biomass Pellet to Biofuels by Pyrolysis in Molten Salts

全体主题 > 生物质固体成型燃料

The use of molten salts can act as an efficient catalytic and heat transfer media for the production of high value added products from the pyrolysis of biomass. In this study, the pyrolysis of cotton stalk pellet was conducted in a novel stainless steel reactor in molten eutectic carbonate salts (34wt.%-Li2CO3+33wt.%-Na2CO3+33wt.%-K2CO3), the effect of different pyrolysis temperature on the both gases and liquid products were fully investigated. Results show that the gas yield was significantly increased from 16.19 to 82.35 wt.% when temperature rising from 450°C to 850°C. The maximum LHV of gases product was obtained with 12.17 MJ/Nm3 at 550°C. To be specific, the yield of CO, CO2, H2, CH4 at 850 °C was increased by 430.17, 234.61, 161.64, 80.92 wt.%, respectively, comparing with those from 550 °C. Correspondingly, the yield of bio-oil was first increased but then decreased with the growth temperature, and the maximum was achieved at 550°C with the yield of 56.94 wt.%. The oxygenated compounds with the presence of valuable ketones, alcohols and phenols take the great part higher than 50 wt.% in the bio-oil. Results indicate that by using the molten carbonate salts pyrolysis, high quality of bio-gas, as well as the bio-oil which appears to be a potential source of renewable fuel and chemical products can be obtained from biomass pellet.