FUEL 164 |
| The hydrothermal liquefaction of low-input high-diversity mixtures of native grassland perennials (LIHD), LIHD pre-treated with dilute acid and lignin extracted from LIHD was studied. The liquid yields were optimized using the following treatment variables: heating rate (5-140°C /min), cooling rate (5-66°C /min), reaction temperature (300-450 °C, corresponding to a pressure range of 10-35MPa), residence time (1-30 min), particle sizes and catalysts (1% and 0.1% sulfuric acid, 1% NaOH, solid superacid SO42-/ZrO2-Al2O3 and solid alkali CaO-ZrO2). The liquefaction yields were found to be dependant on the final liquefaction temperature, the length of liquefaction time and the heating rate. The highest liquid yield of 82.1% was achieved within short residence time of 1 minute at 374°C. The major compounds of the liquid products from the various LIHD fractions were identified by GC-MS. High diversity biomass (LIHD) could be a good candidate for the liquefaction process with a fast heating rate. |
|
Clean Energy, Fuels and Chemicals from Biomass
1:45 PM-4:35 PM, Tuesday, April 8, 2008 Morial Convention Center -- Rm. 239, Oral
Sci-Mix
Division of Fuel Chemistry |