280542 Furfural Production From Microwave Catalytic Torrefaction of Douglas Fir Sawdust Pellets

Wednesday, October 31, 2012
Hall B (Convention Center )
Shoujie Ren1, Hanwu Lei1, Lu Wang1, Quan Bu1, Yupeng Liu1, Jing Liang1, Yi Wei1, Shulin Chen2, Joan Wu3 and Roger Ruan4, (1)Department of Biological Systems Engineering, Washington State University, Richland, WA, (2)Biological Systems Engineering, Washington State University, Pullman, WA, (3)Department of Biological Systems Engineering, Washington State University, Puyallup, WA, (4)Department of Biosystems & Agricultural Engineering, University of Minnesota, St. Paul, MN

Abstract: Furfural is a useful solvent and important intermediate chemical for biofuel production. Literatures reported that pyrolysis of biomass treated by metal chlorides had selectivity on chemicals such as furans and levoglucosans and simplified the composition of bio-oils. However, there are few reports for the effects of metal chlorides on biomass torrefaction which is conducted at the low temperature range from 200 to 300 °C in the absence of oxygen.  Therefore, the focus of this research was to investigate the effects of MgCl2 loading and reaction conditions on the furfural production by microwave torrefaction of Douglas fir sawdust pellets. The yields of bio-oil and torrefaction gases ranged from 21.73 to 37.04 % and 10.49 to 27.66 % respectively were increased with the increase of MgCl2 loading and reaction temperature and time while the torrefied biomass yields were decreased. Three models were developed to predict the products yields.  The GC/MS analysis showed that the concentration of furfural in the torrefaction bio-oil was increased with the increase of MgCl2 loading; and the highest concentration of furfural obtained up to 70 area% was observed at high metal chloride loadings. These results indicate that the MgCl2 had high selectivity for furfural production in torrefaction process. The torrefaction gases analysis showed that high value chemicals such as carbon monoxide, methane, and propane were produced in high concentration.

Extended Abstract: File Not Uploaded