US 11,142,702 B2 · Process and apparatus for hydrotreatment of pyrolysis oil

Abstract

Apparatus and process for producing hydrocarbons from biomass having a pyrolysis reactor (2) in which dry biomass (Bd) is heated in an environment substantially free from oxygen and halogens, a pyrolysis product (PP) and char (C) is produced, a gasification reactor (3) in which separated char (C) is heated in an environment containing steam (Wst) to reduce the char (C) to produce a synthesis gas (Sh), a gas cooler (4) in which the produced synthesis gas (Sh) is cooled to a cooled synthesis gas (Srt); a conditioning and pressure system (5) in which cooled synthesis gas (Srt) is refined to produce a purified synthesis gas (Sp), and a separation device (6) in which hydrogen gas (H2) is separated from purified synthesis gas (Sp). A hydrogenation device (7) into which pyrolysis oil (PO) retrieved from the pyrolysis product (PP) and separated hydrogen gas (H2) recuperated from the separation device (6) are introduced for hydrogenation in which pyrolysis oil (PO) is hydrogenated by the presence of hydrogen gas (H2), and hydrocarbons (BO) that are substantially free from oxygen are produced.

Claims21

Dependent claims

A process for producing hydrocarbons from biomass, the process comprising the following steps:

a pyrolysis step in which dry biomass (Bd) is heated in an environment substantially free from oxygen and halogens, wherein a pyrolysis product (PP) and char (C) is produced;
a pyrolysis separator step in which the char (C) is separated from the pyrolysis product (PP),
a gasification step, in which the separated char (C) is heated in an environment containing water steam (WEt) but substantially no oxygen or halogens so as to reduce said char (C) to produce a synthesis gas (Sh),
a step of cooling the produced synthesis gas (Sh) and a step of refining the cooled synthesis gas to produce a purified synthesis gas (Sp),
separating hydrogen gas (H2) from the purified synthesis gas (Sp), and
retrieving pyrolysis oil (PO) by separating at least a portion of the hydrogen gas (H2) and recuperating it into a hydrogenation step, in which the pyrolysis oil (PO) is hydrogenated by the presence of the hydrogen gas (H2), wherein hydrocarbons (BO) that are substantially free from oxygen are produced.

3 more elements

An apparatus for producing hydrocarbons from biomass, the apparatus comprising:

a pyrolysis reactor (2) in which dry biomass (Bd) is heated in an environment substantially free from oxygen and halogens, wherein a pyrolysis product (PP) and char (C) is produced;
a gasification reactor (3) in which the separated char (C) is heated in an environment containing steam (Wst) but substantially no oxygen or halogens so as to reduce said char (C) to produce a synthesis gas (Sh),
a gas cooler (4) in which the produced synthesis gas (Sh) is cooled to a cooled synthesis gas (Srt);
a conditioning and pressure system (5), in which the cooled synthesis gas (Srt) is refined so as to produce a purified synthesis gas (Sp),
a separation device (6), in which hydrogen gas (H2) is separated from the purified synthesis gas (Sp),
wherein the apparatus also comprises a hydrogenation device (7), into which pyrolysis oil (PO) retrieved from the pyrolysis product (PP), and at least a portion of the separated hydrogen gas (H2) recuperated from the separation device (6) are introduced for a hydrogenation step, in which the pyrolysis oil (PO) is hydrogenated by the presence of the hydrogen gas (H2), wherein hydrocarbons (BO) that are substantially free from oxygen are produced.

3 more elements

Dependencies are inferred from the claim text.

Process and apparatus for hydrotreatment of pyrolysis oil

Life of this patent

Process and apparatus for hydrotreatment of pyrolysis oil

Life of this patent

Abstract

Claims21