Pyrolysis oil and method and system for the production thereof

Patent metadata

Field	Value
Publication number	US-11891572-B2
Application number	US-202117357504-A
Country	US
Kind code	B2
Filing date	Jun 24, 2021
Priority date	Feb 27, 2015
Publication date	Feb 6, 2024
Grant date	Feb 6, 2024

Abstract

A method for producing a pyrolysis oil is described. In said method, a feedstock to be treated is first pyrolyzed in a pyrolysis zone, in which the feedstock is heated to a temperature of 250 degrees Celsius to 700 degrees Celsius; and pyrolyzed solids and pyrolysis vapors are formed. The pyrolysis vapors are then reformed at a temperature of 450 degrees Celsius to 1,200 degrees Celsius in a post-conditioning zone, in which the pyrolysis vapors are brought into contact with a catalyst bed, wherein the pyrolysis oil is formed. In this case, the catalyst comprises a pyrolyzed solid, which can be obtained according to the pyrolysis, described above. Finally the pyrolysis oil is separated from the additional pyrolysis products, which are formed, in a separation unit.

First claim

The invention claimed is:

1. A pyrolysis oil comprising a carbon content greater than 65% by wt., a hydrogen content greater than 5% by wt. and an oxygen content from 3% and up to 9% by wt., a 14 C content of no less than 0.1 parts per trillion, and an ash content.

2. The pyrolysis oil of claim 1 , wherein the ash content in accordance with DIN EN 14775, at 815 degrees Celsius is 0.005% to 0.25% by wt.

3. The pyrolysis oil of claim 1 , wherein the pyrolysis oil has not yet been subjected to further post-conditioning by distillation, water removal, hydrogenation, or hydrodeoxygenation.

4. The pyrolysis oil of claim 1 , wherein the acid value of the pyrolysis oil is less than 15 mg of KOH/g.

5. The pyrolysis oil of claim 1 , wherein the acid value of the pyrolysis oil is less than 10 mg of KOH/g.

6. The pyrolysis oil of claim 1 , wherein the acid value of the pyrolysis oil is less than 6 mg of KOH/g.

7. The pyrolysis oil of claim 1 , wherein the pyrolysis oil has a calorific value in accordance with DIN EN 14918 of greater than 30 MJ/kg.

8. The pyrolysis oil of claim 1 , wherein the pyrolysis oil has a fuel value in accordance with DIN EN 14918 of between 23 and 41 MJ/kg.

9. The pyrolysis oil of claim 1 , wherein no less than 50% by wt. of the pyrolysis oil is distillable without decomposition by means of vacuum distillation at 100 hPa (abs).

10. The pyrolysis oil of claim 1 , wherein no less than 80% by wt. of the pyrolysis oil is distillable without decomposition by means of vacuum distillation at 100 hPa (abs).

11. The pyrolysis oil of claim 1 , wherein a weight ratio of oxygen/carbon of the pyrolysis oil is less than 0.15.

12. The pyrolysis oil of claim 1 , wherein the hydrogen content of the oil is from 6 to 11% by wt.

13. The pyrolysis oil of claim 1 , wherein a weight ratio of hydrogen/carbon of the pyrolysis oil is greater than 0.08.

14. The pyrolysis oil of claim 1 , wherein the nitrogen content of the pyrolysis oil is between 1.5 to 8.3% by wt.

15. The pyrolysis oil of claim 1 , wherein the pyrolysis oil comprises no less than 8% by wt. of aromatic hydrocarbons.

16. The pyrolysis oil of claim 1 , wherein the pyrolysis oil comprises no less than 16% by wt. of aromatic hydrocarbons.

17. The pyrolysis oil of claim 1 , wherein the pyrolysis oil has a density at 15 degrees Celsius in accordance with DIN EN ISO 12185 of more than 840 kg/m 3 .

18. The pyrolysis oil of claim 1 , wherein the water content of the pyrolysis oil is less than 5% by wt.

19. The pyrolysis oil of claim 1 , wherein the pyrolysis oil is derived from pyrolysis of a feedstock having a moisture content of between 10 to 40% by wt.

20. The pyrolysis oil of claim 1 , wherein the pyrolysis oil is derived from pyrolysis of a cellulose-containing material.

21. The pyrolysis oil of claim 1 , wherein the pyrolysis oil is derived from pyrolysis of a sewage sludge.

22. The pyrolysis oil of claim 1 , wherein the pyrolysis oil is derived from pyrolysis of a municipal solid waste.

23. The pyrolysis oil of claim 1 , wherein the pyrolysis oil is an intermediate pyrolysis oil.

24. A pyrolysis oil comprising a carbon content greater than 65% by wt., a hydrogen content greater than 5% by wt. and an oxygen content from 3% and up to 9% by wt., a 14 C content of no less than 0.1 parts per trillion, wherein the pyrolysis oil is distillable without decomposition by means of vacuum distillation at 100 hPa (abs) and has a calorific value in accordance with DIN EN 14918 of greater than 30 MJ/kg.

25. A pyrolysis oil comprising a carbon content greater than 65% by wt., a hydrogen content from 6 to 11% by wt. and an oxygen content from 3% and up to 9% by wt., a 14 C content of no less than 0.1 parts per trillion and an acid value of less than 15 mg of KOH/g.

Assignees

• Fraunhofer Ges Forschung

Inventors

• Hornung Andreas
• Apfelbacher Andreas
• Ouadi Miloud
• Neumann Johannes

Classifications

• C10B53/02 Primary

  of cellulose-containing material (production of pyroligneous acid C10C5/00) · CPC title

• C10B53/00

  Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form (wet carbonising of peat C10F) · CPC title

• C10B53/07

  {of solid raw materials consisting} of synthetic polymeric materials, e.g. tyres (recovery or working-up of waste materials of organic macromolecular compounds or compositions based thereon by dry-heat treatment for obtaining partially depolymerised materials C08J11/10; production of liquid hydrocarbon mixtures from rubber or rubber waste C10G1/10) · CPC title

• C10B57/12

  Applying additives during coking · CPC title

• C10B57/18

  Modifying the properties of the distillation gases in the oven (outside the oven C10K) · CPC title