Process for producing renewable biofuel from a pyrolyzed biomass containing bio-oil stream

摘要

A process for preparing a renewable biofuel consists of subjecting a bio-oil mixture to deoxygenation in a hydrotreater and then separating hydrocarbon fractions from the deoxygenated product to form the biofuel. The bio-oil mixture contains a bio-oil feedstream and a treated bio-oil feed. The treated bio-oil feed is a stream from which undesirable heavy materials and solid materials have been removed.

主权项

1. A process for producing a renewable biofuel from a pyrolyzed biomass containing bio-oil stream and a treated bio-oil feed, the process comprising:
(a) mixing in a mixing zone at least a portion of the treated bio-oil feed with the pyrolyzed biomass containing bio-oil stream to form a bio-oil mixture; (b) separating water and at least a portion of the heavy fraction from the bio-oil mixture produced in the mixing zone to render a non-heavy fraction of the bio-oil mixture; (c) subjecting the non-heavy fraction of the bio-oil mixture produced in the mixing zone to deoxygenation in a hydrotreater to form a separated hydrotreated product and, optionally, a partial deoxygenated intermediate and removing the separated hydrotreated product and the optional partial deoxygenated intermediate from the hydrotreater; (d) removing produced water from the separated hydrotreated product; (e) subjecting the separated hydrotreated product of step (c) to fractionation to render oil having a boiling point in excess of 650° F. and at least one hydrocarbon fraction having a boiling point less than 650° F. and; (f) generating renewable biofuel from the separated fractions wherein the treated bio-oil feed is at least one of the following:
(i) at least a portion of the separated hydrotreated product; or(ii) at least a portion of the at least one hydrocarbon fraction having a boiling point less than 650° F.; or(iii) a partial deoxygenated intermediate.