Demetallization of liquid biomass

1. A system to obtain a reduced-contaminant liquid biomass stream from a metal-containing and chlorine-containing pyrolysis stream, comprising:

i) a pyrolysis reactor;

ii) at least one pyrolysis vapor condenser comprising at least one metal reduction unit;

iii) at least one chlorine reduction unit; and

iv) at least one filter configured to filter at least one pyrolysis liquid stream wherein a first condenser of the at least one pyrolysis vapor condenser is sized to provide a liquid residence time of at least two hours.

2. The system of claim 1 , wherein the first condenser is configured to provide a pyrolysis liquid condensate having an oxalic acid concentration of between 0.1 wt. % and 0.4 wt. % oxalic acid.

3. The system of claim 1 , wherein the first condenser is configured to condense a portion of a pyrolysis vapor stream with a quench stream.

4. The system of claim 3 , wherein the quench stream comprises recirculated condensed pyrolysis liquid.

5. The system of claim 3 , wherein a first metal reduction unit of the at least one metal reduction unit is configured to introduce a metal complexing agent into the quench stream.

6. The system of claim 1 , wherein a first chlorine reduction unit of the at least one chlorine reduction unit is positioned downstream of a first metal reduction unit of the at least one metal reduction unit.

7. The system of claim 6 , wherein the first chlorine reduction unit is configured to contact a first pyrolysis liquid stream of the at least one pyrolysis liquid stream with anionic ion exchange particles.

8. The system of claim 6 , wherein a first filter of the at least one filter is positioned between the first metal reduction unit and the first chlorine reduction unit.

9. The system of claim 1 , wherein a further metal reduction unit different from the at least one metal reduction unit is positioned downstream of the at least one pyrolysis vapor condenser.

10. The system of claim 9 , wherein the further metal reduction unit is configured to contact the at least one pyrolysis liquid stream with cationic ion exchange particles.

11. The system of claim 1 , wherein the at least one pyrolysis vapor condenser further comprises a first chlorine reduction unit of the at least one chlorine reduction unit.

12. A system to obtain a reduced-contaminant liquid biomass stream from a pyrolysis stream, comprising:

i) a pyrolysis reactor;

ii) at least one pyrolysis vapor condenser;

iii) at least one contaminant reduction component having a liquid residence time of at least 2 hours; and

iv) at least one filter configured to filter at least one pyrolysis liquid stream.

13. The system of claim 12 , wherein the at least one contaminant reduction component is configured to contact a pyrolysis condensate with oxalic acid at a concentration of between 0.1 wt. % and 0.4 wt. % oxalic acid.

14. The system of claim 13 , wherein the at least one contaminant reduction component is configured to contact the pyrolysis condensate with anionic ion exchange particles.

15. An apparatus to obtain a reduced-contaminant liquid biomass stream from a metal-containing and chlorine-containing pyrolysis stream, comprising:

i) a pyrolysis reactor;

ii) a quench condenser configured to receive pyrolysis vapors from the pyrolysis reactor;

iii) a supply of a first metal complexing agent in communication with the quench condenser;

iv) a stirred tank configured to receive pyrolysis liquid from the quench condenser;

v) a supply of a second metal complexing agent in communication with the stirred tank and a supply of a chlorine complexing agent in communication with the stirred tank;

vi) a first filter in communication with the quench condenser and the stirred tank, the first filter configured to filter a first metal complex from a first pyrolysis liquid stream;

vi) a second filter communication with the stirred tank, the second filter configured to filter a second metal complex and a chlorine complex from a second pyrolysis liquid stream.

16. The apparatus of claim 15 , wherein the quench condenser is sized to provide a liquid residence time of at least two hours.

17. The apparatus of claim 15 , wherein the first metal complexing agent comprises oxalic acid.

18. The apparatus of claim 15 , wherein the second metal complexing agent comprises cationic ion exchange particles.

19. The apparatus of claim 15 , wherein the chlorine complexing agent comprises anionic ion exchange particles.