76. Thangalazhy-Gopakumar, Suchithra; Adhikari, Sushil; Ravindran, Harideepan; Gupta, Ram B.; Fasina, Oladiran; Tu, Maobing; Fernando, Sandun D.  Physiochemical properties of bio-oil produced at various temperatures from pine wood using an auger reactor.    Bioresource Technology  (2010),  101(21),  8389-8395.   


A fast pyrolysis process produces a high yield of liquid (a.k.a. bio-oil) and has gained a lot of interest among various stakeholders.  Nonetheless, some of the properties inherent by the bio-oil create significant challenges for its wider applications.  Quality of the bio-oil and its yield are highly dependent on process parameters, such as temp., feedstock, moisture content and residence time.  In this study, the effect of temp. on bio-oil quality and its yield were examd. using pine wood, an abundant biomass source in the southeastern part of the United States.  Phys. properties of bio-oil such as pH, water content, higher heating value, solid content and ash were analyzed and compared with a recently published ASTM std.  Bio-oil produced from pine wood using an auger reactor met specifications suggested by the ASTM std.  Thirty-two chem. compds. were analyzed.  The study found that the concn. of phenol and its derivs. increased with the increase in pyrolysis temp. whereas the concn. of guaiacol and its derivs. decreased as the temp. increased.  Concn. of acetic and other acids remained almost const. or increased with the increase in temp. although the pH value of the bio-oil decreased with the increase in temp.   


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