Back to results
US 2009/0151233 A1Published application
System and method for producing transportation fuels from waste plastic and biomass
AssigneeChevron U.S.A. Inc.
InventorStephen J. Miller
Life of this patent
Estimating the term…
Abstract
The present invention is generally directed to methods and systems for producing biofuels via biomass, waste plastic, and/or Fischer-Tropsch product feeds. Such methods and systems are an improvement over the existing art at least in that they are feed-tolerant (i.e. allow for variability) and provide an economy of scale, while typically retaining the environmental benefits associated with such processing of such feeds.
Claims20
A method comprising the steps of.
- a) pyrolyzing biomass concurrently with a second material selected from the group consisting of waste plastic, Fischer-Tropsch wax, and combinations thereof;
- so as to yield pyrolysis oil;
- b) separating the pyrolysis oil into at least two component fractions according to boiling range;
- c) hydrotreating at least one of the at least two component fractions so as to yield at least one hydrotreated intermediate;
- and
- d) catalytically-isomerizing the at least one hydrotreated intermediate so as to yield at least one isomerized product.
3 more elements
A system comprising:
- a) a pyrolysis unit;
- b) at least two feeds in communication with said pyrolysis unit, said at least two feeds comprising (i) a biomass feed, and (ii) at least one of a waste plastic feed and a Fischer-Tropsch waxy feed, wherein the at least two feeds can be channeled into the pyrolysis unit sequentially or simultaneously so as to produce pyrolysis oil, and wherein each feed can be varied so as to modulate the properties of the pyrolysis oil so produced;
- c) a separation unit for separating the pyrolysis oil into at least two pyrolyzed component fractions according to their boiling range;
- d) a hydrotreating unit for hydrotreating at least one of the pyrolyzed component fractions so as to yield one or more hydrotreated fractions;
- and
- e) an isomerization unit for catalytically-isomerizing at least one of the hydrotreated fractions so as to yield at least one isomerized product.
3 more elements
Dependencies are inferred from the claim text.