Friday, November 22, 2013 at 4:10pm in FSHN T101.
Yi Wei, PhD Candidate, Biological and Agricultural Engineering will present:
Advanced upgrading of pyrolysis oil via liquid-liquid extraction
Biomass is one of important renewable energy sources. It can be used to produce carbon-based liquid fuels through biochemical and thermochemical methods. Pyrolysis is a thermal chemical method that converts biomass to high energy fuels called bio-oils which are expected to replace the transportation fuel. Various organics with quite different oxygen-containing functional groups mixing together in bio-oil lead to the high instability of bio-oils. A liquid-liquid extraction method was developed to separate the bio-oil into different chemical groups by their polarities to stabilize bio-oils and improve the quality. The separated bio-oil had similar oxygen-containing functional groups in different phases. Biomass pyrolysis using Douglas fir pellet and characterization of the bio-oil chemical compounds were conducted followed by bio-oil liquid-liquid extractions with several solvents (e.g. hexane, petroleum ether and chloroform). Compared with the raw bio-oil, solvent phase had high concentrations (85%) of phenols and guaiacols, while no sugar and very low acid and alcohol content were detected, which were left in the water phases. Only 16.17 wt. % of total organics based on bio-oil was left in water phase, with a high content of acid and alcohol. Besides, trace of phenolics or guaiacols and no furans were found in the recycling chloroform, indicating an eligible purity of 96.78 wt. % of solvent was distilled and could be reused.
Mark DeKleine, PhD Candidate, Biological and Agricultural Engineering will present:
Evaluating Fruit Impact Bruising on A non-Newtonian Shear Thickening Surface
Fruit bruising that occurs during harvest and post harvest processes decreases the quality of fresh market fruit. Drop heights and fruit contact surfaces are important to engineers designing machinery and processing equipment. In this study, various drop tests were conducted using an instrumented sphere, peaches, pears, and apples. The instrumented sphere was dropped on three surfaces: a tiled floor, a human hand, and a non-Newtonian shear-thickening surface–composed of cornstarch and water. SnowGiant peaches, Bosc pears and six varieties of apples (Gala, Red Delicious, Golden Delicious, Jazz, Pacific Rose and Fuji) were dropped onto a non-Newtonian surface and physically examined for impact bruises. The drop heights for the instrumented sphere ranged from 30 cm (12 in.) to 91 cm (3 ft.). The peak acceleration and velocity recorded by the instrumented sphere, when dropped from 30 cm (12 in) on the tiled floor, was 323.0 G and 4.0 m s-1, respectively, compared to 50.1 G and 2.3 m s-1 on the non-Newtonian surface. At a drop height of 90 cm (36 in.), the maximum acceleration and velocity recorded on the non-Newtonian surface was 140 G and 4.5 m s-1. The instrumented sphere dropped from 30.5 cm (12 in.) onto a non-Newtonian shear-thickening surface recorded similar peak acceleration and velocity change when compared to a drop onto a human hand. Peaches dropped from 61 cm (24 in.) and 90 cm (36 in.) on non-Newtonian surface had bruise rates of 15% and 25%, respectively. Peaches tended more to bruise when dropped on the shoulder of the fruit. Pears that dropped from 396 cm (13 ft.) had a damage rate of 30%. Pear bruising was not significantly different based on the drop locations in the fruit. Red Delicious apples showed the least amount of bruising at 10% while Pacific Rose bruised 66% of the time, when dropped from 122 cm (48 in.). For use as a damage boundary in harvesting and handling procedures, a surface containing a non-Newtonian shear-thickening fluid can decrease the peak acceleration during fruit impacting.
Updated: November 21, 2013 (CM)
BSysE is one of the best....[more]
Shyam Sablani is Cocharan Fellowship Program
Manoj Karkee Recieves USDA Tree Fruit Harvesting Grant ....[more]
Qin Zhang named ASABE fellow....[more]
Ogderel Bumandalai in WSUNews
BSysE sends 25 Students to ASABE
Dr. Craig Frear talks about
WSU Anaerobic Digestin Systems
Field Day. [more]
New Faculty Members Lav R. Khot and Sindhuja Sankaran join BSysE. [more]
Additional Information Goes Here.