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Zeolitic catalytic conversion of alcohols to hydrocarbons

a catalytic conversion and alcohol technology, applied in the field of catalytic conversion of alcohols to hydrocarbons, can solve the problems of prohibitive alcohol-to-hydrocarbon conversion, general inability to commercialize alcohol conversion, and application of current conversion methodology to biomass-produced alcohols (i.e., bio-alcohols)

Inactive Publication Date: 2014-04-10
UT BATTELLE LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about a way to convert alcohols to hydrocarbons without needing to purify or concentrate the alcohol before the conversion. The method can work with dilute solutions of alcohols found in fermentation processes, and uses a metal-loaded zeolite catalyst that can be heated up to very high temperatures. The method is efficient and can produce useful hydrocarbons from alcohols.

Problems solved by technology

The conversion of alcohols to hydrocarbons is generally not commercially feasible.
Alcohol-to-hydrocarbon conversion is further prohibitive due to the significant cost requirements of current conversion processes.
However, a major obstacle in applying current conversion methodology to biomass-produced alcohols (i.e., bio-alcohols) is the high concentration of water (and concomitant low alcohol concentrations) typically encountered in fermentation streams produced in biomass-to-alcohol refineries.
Current alcohol-to-hydrocarbon conversion processes are generally incapable or highly ineffective in providing such conversion at such dilute alcohol and high water concentrations.
Moreover, concentration and / or distillation of alcohol from a fermentation stream to accommodate current technologies would be highly energy intensive, and thus, would largely offset gains made in the initial low cost of using a bio-alcohol.

Method used

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  • Zeolitic catalytic conversion of alcohols to hydrocarbons
  • Zeolitic catalytic conversion of alcohols to hydrocarbons
  • Zeolitic catalytic conversion of alcohols to hydrocarbons

Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Cu-ZSM5 Catalyst

[0060]NH4-ZSM-5 was purchased from Zeolyst International (CBV-2314) with a SiO2 / Al2O3 ratio of 23 and used as received. The calcination of NH4-ZSM-5 at 500° C. for four hours furnished H-ZSM-5 in quantitative yield. A 2.664 g sample of commercially available Cu(OOCCH3)2.H2O was dissolved in 600 mL de-ionized water to make a 22 mole solution. A 10.0 g sample of H-ZSM-5 was added to the copper acetate solution and the suspension stirred at 50° C. for two hours. A blue-colored solid was collected by filtration after cooling and washed with de-ionized water, dried, and calcined in air at 500° C. for four hours to obtain Cu-ZSM-5. Elemental analysis shows 2.76% Cu and 3.31% Al in the sample.

example 2

Preparation of Fe-ZSM-5 Catalyst

[0061]A 12 g sample of H-ZSM-5 was suspended in degassed 0.02 M Fe(NO3)3 aqueous solution. The suspension was stirred at room temperature for 24 hours. A light pink-colored solid was collected by filtration and washed with de-ionized water, dried, and calcined in air at 550° C. for four hours to obtain 9.98 g of Fe-ZSM-5. Elemental analysis shows 776 ppm of iron.

example 3

Preparation of CuFe-ZSM-5 Catalyst

[0062]A 5 g sample of Cu-ZSM-5 was suspended in a 25 mL aqueous solution of 0.015 M Fe(NO3)3, degassed with N2, and was kept stirring for two hours at 80° C. A brown solid was collected from the reaction mixture by filtration while rejecting a clear and colorless filtrate. The powder was calcined in air at 500° C. (2° C. / min) for two hours to obtain a pale yellow powder of CuFe-ZSM-5. Elemental analyses: Cu 2.39%; Fe 0.40%; Al 2.97%.

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Abstract

A method for converting an alcohol to a hydrocarbon, the method comprising contacting said alcohol with a metal-loaded zeolite catalyst at a temperature of at least 100° C. and up to 550° C., wherein said alcohol can be produced by a fermentation process, said metal is a positively-charged metal ion, and said metal-loaded zeolite catalyst is catalytically active for converting said alcohol to said hydrocarbon.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of priority from U.S. Provisional Application 61 / 497,256, filed on Jun. 15, 2011.GOVERNMENT SUPPORT[0002]This invention was made with government support under Prime Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The government has certain rights in the invention.FIELD OF THE INVENTION[0003]The present invention relates, generally, to the catalytic conversion of alcohols to hydrocarbons, and more particularly, to zeolite-based catalytic methods for such conversion.BACKGROUND OF THE INVENTION[0004]The conversion of alcohols to hydrocarbons is generally not commercially feasible. In fact, the majority of commercial alcohols are produced from hydrocarbons. Alcohol-to-hydrocarbon conversion is further prohibitive due to the significant cost requirements of current conversion processes. Hence, alcohol obtained by natural means (e.g., by fermentation of biomass) would be a significantl...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C07C1/22B01J35/00
CPCC07C1/22B01J29/46B01J29/48C12P7/06C12P7/08C12P7/10C10G2300/1014C10G2300/4006C10G2400/02C10G2400/04C10G2400/08B01J37/0246B01J29/061B01J29/072B01J29/076B01J29/143B01J29/146B01J29/163B01J29/166B01J29/68B01J29/69B01J29/7615B01J29/7669B01J29/7692B01J29/7815B01J29/7861B01J29/7869B01J29/7892B01J2229/183B01J2229/186B01J29/7661C12P7/16C10G3/45C10G2300/1011C10G3/49B01J35/40B01J35/56Y02E50/10Y02P30/20
Inventor NARULA, CHAITANYA K.DAVISON, BRIAN H.KELLER, MARTIN
Owner UT BATTELLE LLC