Catalytic biomass deconstruction

Inactive Publication Date: 2012-07-05
VIRENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0028]FIG. 2 is a chart illustrating the conversion of 10% cellulose to polyols at 260° C. using an Ru—C catalyst and a short soak time.
[0029]FIG. 3 is a chart illustrating the product yield in aqueous fraction from MCC at 260° C. using a Ru—C catalyst and a short soak time.
[0030]FIG. 4 is a chart illustrati

Problems solved by technology

No cost-effective process currently exists for efficiently converting cellulose, hemicellulose, and lignin to components better suited for producing fuels, chemicals, and other products.
Existing methods for converting biomass to usable feedstock are not sufficient to meet the growing needs of bioreforming processes.
Hot water extraction of hemicelluloses from biomass has been well documented, but the sugars

Method used

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  • Catalytic biomass deconstruction
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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0083]A biomass slurry containing 10 wt % microcrystalline cellulose (MCC) in water was prepared and converted to a biomass hydrolyzate using ruthenium on a carbon support. Experiments were conducted in a Parr reactor at 240° C. and 260° C., and at variable processing times of 10 and 20 minutes.

[0084]It was discovered that the thermal decomposition of the sugar intermediates is minimized / avoided with the formation of the more stable oxygenates that arise from the hydrogenolysis of the saccharides and polysaccharides. The Ru—C catalyst and short soak times at 260° C. provided high conversion and sugar-polyol yields, with 72% conversion of microcrystalline cellulose (MCC) and a sugars-polyol yield of 48%. A high yield of sorbitol (27 g / g MCC) was found with Ru / C catalyst as illustrated in FIGS. 2 and 3. The mass balance was 94% and aqueous analytical balance was 72%.

[0085]The effectiveness of the longer reaction time (20 min vs. 10 min) is shown in FIGS. 4 and 5. The extended reaction...

example 2

[0086]Several deconstruction catalysts were analyzed for their ability to convert 10% MCC in water to sugars / polyols. Experiments were conducted in a Parr reactor at 260° C. for 10 minutes. As illustrated in FIGS. 6 and 7, platinum improves cellulose conversion and provokes higher extent hydrogenolysis.

example 3

[0087]A biomass slurry containing 10 wt % bagasse was converted to biomass hydrolyzate using the Ru / C catalyst as described in Example 1. Experiments were conducted in a Parr reactor at 245° C. and 260° C. for 10 minutes. FIGS. 8 and 9 provide a comparison of the conversion and product yields for bagasse versus the MCC of Example 1.

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Abstract

The present invention provides processes for catalytically converting biomass to oxygenated compounds suitable for use in bioreforming processes.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of U.S. Provisional Application No. 61 / 428,454 filed on Dec. 30, 2010.FEDERAL FUNDING STATEMENT[0002]This invention was made with government support under award #70NANB7H7023, requisition #4700558 awarded by NIST through the ATP program. The government has certain rights in the invention.TECHNICAL FIELD[0003]The present invention is directed to catalysts and methods for deconstructing and fractionating biomass using heterogeneous catalysts.BACKGROUND OF THE INVENTION[0004]The increasing cost of fossil fuel and environmental concerns have stimulated world-wide interest in developing alternatives to petroleum-based fuels, chemicals, and other products. Biomass materials are a possible renewable alternative.[0005]Lignocellulosic biomass includes three major components. Cellulose, a primary sugar source for bioconversion processes, includes high molecular weight polymers formed of tightly linked glucose mono...

Claims

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Application Information

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IPC IPC(8): C07H3/02C07C51/00C07C31/20C07C31/22C07C31/24C07D493/04C07C31/18
CPCC07C27/04C10G2300/805C07C29/132C10G2300/1011C10G2300/1014C10L1/02C10L1/026C13K1/02C07C29/00C10G2300/44C10G2300/4081C10G2300/202C07C31/26C07C31/207Y02P30/20C07D307/46B01J23/42B01J23/462B01J31/10C07C45/55C07C51/00
Inventor QIAO, MINGCORTRIGHT, RANDY D.NAGAKI, DICK A.WOODS, ELIZABETH
Owner VIRENT
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