Hydropyrolysis of biomass for producing high quality liquid fuels
First Claim
1. A process for a producing a liquid hydrocarbon-containing product from biomass, the process comprising:
- (a) pyrolyzing the biomass in the presence of hydrogen and a deoxygenation catalyst to provide a hydropyrolysis effluent comprising a partially deoxygenated hydropyrolysis product and char, and(b) hydroconverting the partially deoxygenated hydropyrolysis product in the presence of a hydroconversion catalyst to provide a hydroconversion effluent comprising the liquid hydrocarbon-containing product, a water-containing product, and a gaseous mixture comprising CO and C1-C3 hydrocarbons, and(c) steam reforming at least a portion of the gaseous mixture,wherein deoxygenation in step (a) and hydroconversion in step (b) are carried out to an extent whereby the liquid hydrocarbon-containing product has an oxygen content of less than 2% by weight, such that the liquid-hydrocarbon-containing product is phase-separable from the water-containing product.
1 Assignment
0 Petitions
Accused Products
Abstract
A self-sustaining process for producing liquid fuels from biomass in which the biomass is hydropyrolyzed in a reactor vessel containing molecular hydrogen and a deoxygenating catalyst, producing a partially deoxygenated pyrolysis liquid, which is hydrogenated using a hydroconversion catalyst, producing a substantially fully deoxygenated pyrolysis liquid and a gaseous mixture comprising CO and light hydrocarbon gases (C1-C4). The gaseous mixture is reformed in a steam reformer, producing reformed molecular hydrogen, which is then introduced into the reactor vessel for hydropyrolizing the biomass. The deoxygenated liquid product is further processed to produce diesel fuel and gasoline.
51 Citations
24 Claims
-
1. A process for a producing a liquid hydrocarbon-containing product from biomass, the process comprising:
-
(a) pyrolyzing the biomass in the presence of hydrogen and a deoxygenation catalyst to provide a hydropyrolysis effluent comprising a partially deoxygenated hydropyrolysis product and char, and (b) hydroconverting the partially deoxygenated hydropyrolysis product in the presence of a hydroconversion catalyst to provide a hydroconversion effluent comprising the liquid hydrocarbon-containing product, a water-containing product, and a gaseous mixture comprising CO and C1-C3 hydrocarbons, and (c) steam reforming at least a portion of the gaseous mixture, wherein deoxygenation in step (a) and hydroconversion in step (b) are carried out to an extent whereby the liquid hydrocarbon-containing product has an oxygen content of less than 2% by weight, such that the liquid-hydrocarbon-containing product is phase-separable from the water-containing product. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 19, 22)
-
-
16. A process for a producing a liquid hydrocarbon-containing product from biomass, the process comprising:
-
(a) pyrolyzing the biomass in the presence of hydrogen and a deoxygenation catalyst to provide a hydropyrolysis effluent comprising a partially deoxygenated hydropyrolysis product and char; (b) hydroconverting the partially deoxygenated hydropyrolysis product in the presence of a hydroconversion catalyst to provide a hydroconversion effluent comprising the liquid hydrocarbon-containing product, a liquid water-containing product, and a gaseous mixture comprising CO and C1-C3 hydrocarbons; and (c) steam reforming at least a portion of the gaseous mixture, using at least a portion of the liquid water-containing product, wherein the liquid hydrocarbon-containing product has an oxygen content of less than 5% by weight. - View Dependent Claims (17, 20, 23)
-
-
18. A process for a producing a liquid hydrocarbon-containing product from biomass, the process comprising:
-
a) pyrolyzing the biomass in the presence of hydrogen and a deoxygenation catalyst to provide a hydropyrolysis effluent comprising a partially deoxygenated hydropyrolysis product and char; b) hydroconverting the partially deoxygenated hydropyrolysis product in the presence of a hydroconversion catalyst to provide a hydroconversion effluent comprising the liquid hydrocarbon-containing product, a water-containing product, and a gaseous mixture comprising CO and C1-C3 hydrocarbons, and separating the liquid hydrocarbon-containing product, the water-containing product, and the gaseous mixture; and c) steam reforming at least a portion of the gaseous mixture, using at least a portion of the water-containing product following separation in step (b), wherein (i) steam reforming step (c) generates sufficient H2 for consumption in hydropyrolysis step (a) and hydroconversion step (b), and (ii) steps (a), (b), and (c) are operated with a net production of water. - View Dependent Claims (21, 24)
-
Specification