Thermochemical conversion of biomass
The invention relates to a method for producing crude oil from biomass by direct liquefaction under atmospheric pressure, involving the following steps: introducing dried biomass into a reactor containing heavy oil to form a sump oil phase consisting of biomass and heavy oil; maintaining the temperature of the sump oil phase at a predetermined reaction temperature; condensing and collecting the volatile reaction products; and isolating and collecting the crude oil. Said method is characterized in that the heavy oil phase has at least 5 wt. % organically bound oxygen.
1. A method for producing crude oil from biomass by direct liquefaction under atmospheric pressure, said method comprising:
a) introducing dried biomass into a reactor containing heavy oil to form a sump oil phase containing biomass and heavy oil;
b) maintaining the temperature of the sump oil phase at a predetermined reaction temperature;
c) condensing and collecting the volatile reaction products; and
d) isolating and collecting the crude oil,
wherein the heavy oil portion of the sump oil phase has at least 5 wt. % organically bound oxygen.
2. The method according to claim 1 , wherein the biomass is continuously introduced into the reactor.
3. The method according to claim 1 , wherein the reaction temperature is in the range from 250 to 550° C.
4. The method according to claim 1 , wherein before introducing the biomass, the reactor is preheated to the reaction temperature.
5. The method according to claim 1 , wherein the heavy oil is wood tar.
6. The method according to claim 1 , wherein the heavy oil is wood tar with portions of tall oil.
7. The method according to claim 1 , wherein the heavy oil is softwood tar.
8. The method according to claim 1 , wherein the heavy oil is softwood tar with portions of tall oil.
9. The method according to claim 1 , wherein the heavy oil is hardwood tar.
10. The method according to claim 1 , wherein the heavy oil is hardwood tar with portions of tall oil.
11. A hydrophobic crude oil, produced according to the method of claim 1 .
12. The hydrophobic crude oil according to claim 11 , wherein said hydrophobic crude oil has a calorific value of ≧25 MJ/kg.
13. The method according to claim 1 , wherein said method is conducted without addition of catalytic converters.
14. The method according to claim 1 , wherein the resultant hydrophobic crude oil has a calorific value of ≧25 MJ/kg.
15. The method according to claim 1 , wherein crushed dried biomass is fed by a conveying member directly into the sump oil phase.
16. The method according to claim 1 , wherein said method is conducted without using an internal heavy oil cycle.
17. The method according to claim 13 , wherein said method is conducted without using an internal heavy oil cycle.