System for producing transportation fuels from waste plastic and biomass
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.
1. 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 are configured to channel the at least two feeds into the pyrolysis unit sequentially or simultaneously so as to produce pyrolysis oil, and wherein the at least two feeds are separated from the pyrolysis unit by a regulatory unit configured to individually control the rate at which each feed is fed into the pyrolysis unit such that each feed is varied so as to produce a uniform product or products from a non-uniform feed;
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.
2. The system of claim 1 , wherein the separation unit utilizes a distillation technique.
3. The system of claim 1 , wherein the hydrotreating unit comprises a supported active catalyst component, said component being selected from the group consisting of Co—Mo, Ni—Mo, noble metals, and combinations thereof.
4. The system of claim 1 , wherein the isomerization unit comprises a supported noble metal isomerization catalyst.
5. The system of claim 1 , wherein there are at least three feeds in communication with the pyrolysis unit, said feeds comprising (i) a biomass feed, (ii) a waste plastic feed, and (iii) a Fischer-Tropsch waxy feed.
6. The system of claim 5 , further comprising an integrated gas-to-liquids processing unit in communication with the Fischer-Tropsch waxy feed.
7. The system of claim 1 , wherein the regulatory unit is configured to control the rate at which each feed is fed into the pyrolysis unit on-the-fly.
8. A system comprising:
a) a pyrolysis unit;
b) at least three feeds in communication with said pyrolysis unit, said at least three feeds comprising (i) a biomass feed, (ii) a waste plastic feed, and (iii) a Fischer-Tropsch waxy feed, wherein the at least three feeds are configured to channel the at least three feeds into the pyrolysis unit sequentially or simultaneously so as to produce pyrolysis oil, and wherein the at least three feeds are separated from the pyrolysis unit by a regulatory unit configured to individually control the rate at which each feed is fed into the pyrolysis unit;
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.