Carbohydrates upgrading and hydrotreating to hydrocarbons
First Claim
Patent Images
1. An upgrading system to convert polyols into hydrocarbons comprising:
- a) a feed stream comprising a oxygenate feedstock,b) a catalytic upgrader comprising a zeolite catalyst and configured to upgrade the feed stream to mixed hydrocarbons,c) a separator operatively connected to the catalytic upgrader and configured to receive and separate the mixed hydrocarbons to generate a light gas stream, an aqueous stream and an organic stream,d) a reformer configured to receive the light gas stream c) and the aqueous stream c) and to convert the light gas stream into a hydrogen stream,e) a hydrotreater operatively connected to the separator and reformer and configured to convert part of the organic stream (c) and hydrogen stream (d) into a saturated hydrocarbon stream, andf) a recycle system operatively connected to the catalytic reactor and the hydrotreater and configured to recycle a portion of the hydrotreater product comprising saturated hydrocarbons to the catalytic upgrader (a) as a hydrogen donor.
2 Assignments
0 Petitions
Accused Products
Abstract
Technologies to convert biomass to liquid hydrocarbon fuels are currently being developed to decrease our carbon footprint and increase use of renewable fuels. Since sugars/sugar derivatives from biomass have high oxygen content and low hydrogen content, coke becomes an issue during zeolite upgrading to liquid hydrocarbon fuels. A process was designed to reduce the coke by co-feeding sugars/sugar derivatives with a saturated recycle stream containing hydrogenated products.
15 Citations
34 Claims
-
1. An upgrading system to convert polyols into hydrocarbons comprising:
-
a) a feed stream comprising a oxygenate feedstock, b) a catalytic upgrader comprising a zeolite catalyst and configured to upgrade the feed stream to mixed hydrocarbons, c) a separator operatively connected to the catalytic upgrader and configured to receive and separate the mixed hydrocarbons to generate a light gas stream, an aqueous stream and an organic stream, d) a reformer configured to receive the light gas stream c) and the aqueous stream c) and to convert the light gas stream into a hydrogen stream, e) a hydrotreater operatively connected to the separator and reformer and configured to convert part of the organic stream (c) and hydrogen stream (d) into a saturated hydrocarbon stream, and f) a recycle system operatively connected to the catalytic reactor and the hydrotreater and configured to recycle a portion of the hydrotreater product comprising saturated hydrocarbons to the catalytic upgrader (a) as a hydrogen donor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A method for upgrading biomass oxygenates into hydrocarbons comprising:
-
a) upgrading an oxygenate feedstock with a catalytic upgrader comprising a zeolite catalyst and one or more hydrogen donors, b) separating a light gas stream, an aqueous stream and an organic stream, c) reforming the light gas stream into a hydrogen stream, d) hydrotreating the organic stream (b) with a hydrotreating catalyst and a hydrogen stream (c), and e) isolating a saturated hydrocarbon stream, and a recycle system, wherein a portion of the hydrotreater product comprising saturated hydrocarbons is recycled to the catalytic upgrader (a) as a hydrogen donor molecule. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
-
Specification