Mørup, Anders5; Christensen, Per Runge5; Aarup, David Friis2; Dithmer, Line5; Mamakhel, Mohammad Aref Hasen5; Glasius, Marianne5; Iversen, Bo Brummerstedt5
1 Department of Chemistry, Science and Technology, Aarhus University2 Department of Chemistry, Faculty of Science, Aarhus University, Aarhus University3 iNano-School, Science and Technology, Aarhus University4 Interdisciplinary Nanoscience Center, Science and Technology, Aarhus University5 Department of Chemistry, Science and Technology, Aarhus University
The effect of the reaction temperature on hydrothermal liquefaction of dried distillers grains with solubles (DDGS) was investigated using a novel stop-flow reactor system at varying temperatures (300–400 °C), fixed pressure (250 bar), and fixed reaction time (15 min). The stop-flow reactor provides rapid heating of biomass feeds and the option of performing multiple sequential repetitions. This bypasses long, uncontrollable temperature gradients and unintended changes in the reaction chemistry. The product, a crude bio-oil, was characterized in terms of yield, elemental composition, and chemical composition. Higher reaction temperatures resulted in improved bio-oil yields, less char formation, and higher heating values of the bio-oil. A supercritical reaction temperature of 400 °C was found to produce bio-oil in the highest yields and of the best quality.
Energy and Fuels, 2012, Vol 26, Issue 9, p. 5944-5953