Deoxygenation of biomass derived oxygenates to hydrocarbons via direct methane intervention

Patent metadata

Field	Value
Publication number	US-9580660-B2
Application number	US-201113157455-A
Country	US
Kind code	B2
Filing date	Jun 10, 2011
Priority date	Jun 18, 2010
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

The application describes a process where methane or any short chained hydrocarbon could be catalytically coupled with an oxygenate (preferably derived from thermal processing of biomass) to dehydrate and produce a deoxygenated hydrocarbon. The presence of oxygen in biomass derivatives adversely affects its ability to be further processed into hydrocarbon fuels because the resulting water poisons many catalysts (including alumina containing catalysts, zeolites, etc.) found in petrochemical refineries. While commonly used hydrodeoxygenation methods require expensive hydrogen to instigate deoxygenation, the present process uses short chained hydrocarbons (such as methane or natural gas) to instigate hydrodeoxygenation.

First claim

The invention claimed is:

1. A method for deoxygenating oxygenates, comprising:
a) providing the following consisting of:
i) a short chained hydrocarbon consisting of C 1 -C 4 carbon atoms;
ii) an alkali or transition metal impregnated ZSM-5 catalyst; and
iii) a biomass comprising an oxygenate, wherein said oxygenate is glucose; and

b) reacting said hydrocarbon with said oxygenate in the presence of said catalyst so as to create a reaction coupling hydrocarbon steam reforming and dehydrative aromatization to produce a deoxygenated hydrocarbon, wherein said deoxygenated hydrocarbon is an aromatic hydrocarbon comprising benzene, toluene, ethyl benzene, or xylenes.

2. The method of claim 1 , wherein said hydrocarbon steam reforming and dehydrative aromatization reactions are concurrent.

3. The method of claim 1 , wherein said short chained hydrocarbon is methane.

4. The method of claim 1 , wherein said short chained hydrocarbon is derived from natural gas.

5. The method of claim 1 , wherein said oxygenate is derived from thermal processing of biomass.

6. The method of claim 1 , wherein said metal impregnated ZSM-5 catalyst is impregnated with nickel.

7. The method of claim 1 , wherein said metal impregnated ZSM-5 catalyst is impregnated with platinum.

8. The method of claim 1 , wherein said reaction generates molecular hydrogen.

9. The method of claim 8 , wherein said hydrogen reacts with said oxygenates so as to aromatize said oxygenates, thereby removing oxygen in the form of water.

Assignees

• Fernando Sandun
• Gunawardena Duminda Anuradh
• Texas A & M Univ Sys

Inventors

• Fernando Sandun
• Gunawardena Duminda Anuradh

Classifications

• C10G3/47

  containing platinum group metals or compounds thereof · CPC title

• C10G45/30

  characterised by the catalyst used · CPC title

• C10G2300/1025

  Natural gas · CPC title

• C10G3/49 Primary

  containing crystalline aluminosilicates, e.g. molecular sieves · CPC title

• Y02P30/20

  using bio-feedstock · CPC title