Methods for producing bio-oil
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorsCharles A. Mullen, Akwasi A. Boateng, Neil M. Goldberg
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Abstract
Methods for producing bio-oil from a feedstock (e.g., lignocellulosic) involving (1) pyrolyzing the feedstock in an inert atmosphere in a reactor to produce bio-oil, bio-char and non-condensable gases; (2) recycling 50 to about 85% of the non-condensable gases to the reactor to produce deoxygenated bio-oil; wherein the method is conducted in the absence of oxygen and wherein the method does not utilize externally added catalysts.
Claims32
A method for producing bio-oil from a feedstock, said method comprising (1) pyrolyzing said feedstock in an inert atmosphere in a reactor to produce bio-oil, bio-char and non-condensable gases;
- (2) returning said non-condensable gases as a recycle gas to said reactor to produce deoxygenated bio-oil;
- wherein after (2) the atmosphere in said reactor comprises 50 to about 85% recycle gas and is held at steady state;
- wherein said method is conducted in the absence of oxygen and wherein said method does not utilize externally added catalysts;
- wherein said feedstock is a lignocellulosic feedstock;
- wherein benzene, toluene and xylene are produced after (2).
Dependencies are inferred from the claim text.