# US 8,465,558 B2 · Biofuel

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- Number: US 8,465,558 B2
- Document ID: US8465558B2
- Status: Granted
- Kind: B2
- Application number: 12/867,505
- Filed: 2009-02-10
- Published: 2010-12-30
- Granted: 2013-06-18
- Earliest claimed: 2008-02-14
- Assignees: Ecotraffic ERD3 AB
- Applicants: Lars Eriksson; Borje Gevert
- Inventors: Lars Eriksson; Borje Gevert
- Web page: https://patentgrep.com/patent/US8465558B2

## CPC

- C10L 1/322: {Coal-oil suspensions}
- C10L 5/366: {Powders}
- C10L 5/44: on vegetable substances
- Y02E 50/10: Biofuels, e.g. bio-diesel
- Y02E 50/30: Fuel from waste, e.g. synthetic alcohol or diesel
- C10L: FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUIFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A biofuel product comprises a slurry of pulverized combustible solid biomass material in a combustible liquid product of vegetable origin. In accordance with the invention, the product of vegetable origin is glycerol, and a mixture ratio between the glycerol and the pulverized solid biomass material is such, that the slurry at least upon heating to around 90° C. has a low viscosity and is pumpable. The glycerol utilized is obtained as a byproduct in the production of biodiesel fuel or soap, fatty acids, fatty alcohols or alkyl esters, and the pulverized combustible solid biomass material preferably is lignin powder, and/or wood powder and/or other pulverized vegetable solid biomass material, such as peat, and/or powder of carbon from vegetable material. The biofuel product may be used as a replacement for heavy fuel oil, for example.

## Claims

### Claim 1

A method of producing a biofuel slurry, the method comprising:
providing a combustible biomass powder comprising lignin powder;
providing a liquid glycerol of vegetable origin; and
mixing the powder and the glycerol to form a slurry having a dynamic viscosity that is below 2000 mPa-s at 90 degrees Celsius, wherein the powder and the glycerol are mixed at a ratio of 3 parts by weight glycerol and up to 5 parts by weight of powder.

### Claim 2 (depends on 1)

A method according to claim 1, further comprising adding water to the slurry.

### Claim 3 (depends on 1)

A method according to claim 1, wherein the powder includes pulverized peat.

### Claim 4 (depends on 1)

A method according to claim 1, wherein the powder has a water content between 10% and 30% by weight.

### Claim 5

A method of producing a biofuel slurry, the method comprising:
providing a combustible biomass powder comprising lignin powder;
providing a liquid glycerol of vegetable origin; and
mixing the powder and the glycerol to form a slurry having a dynamic viscosity that is below 2000 mPa-s at 90 degrees Celsius, wherein the powder and the glycerol are mixed at a ratio of at least 1 part by weight of powder per 1 part by weight of glycerol.

### Claim 6 (depends on 1)

A method according to claim 1, wherein the glycerol results from a transesterification of an oil created by algae.

### Claim 7 (depends on 1)

A method according to claim 1, wherein the powder includes a sawdust.

### Claim 8 (depends on 1)

A method according to claim 1, wherein the powder and the glycerol are mixed at a ratio of up to 1 part by weight of powder per 1 part by weight of glycerol.

### Claim 9 (depends on 1)

A method according to claim 1, wherein the slurry has a viscosity of at most 2000 mPa-sec at room temperature.

### Claim 10 (depends on 1)

A method according to claim 1, wherein the powder includes a pulverized peat and a sawdust.

### Claim 11 (depends on 1)

A method according to claim 1, wherein the powder includes at least two of a pulverized peat, a sawdust, and a pulverized, carbonized vegetable material.

### Claim 12 (depends on 1)

A method according to claim 1 wherein the powder and the glycerol are mixed at a ratio of up to 3 parts by weight of powder per 10 parts by weight of glycerol.

### Claim 13 (depends on 1)

A method according to claim 1, wherein:
the powder includes lignin powder and sawdust;
the powder has a water content between 10% and 30% by weight; and
the powder and the glycerol are mixed at a ratio of up to 3 parts by weight of powder per 10 parts by weight of glycerol.

### Claim 14

A method of producing a biofuel slurry, the method comprising:
providing a combustible biomass powder comprising lignin powder;
providing a liquid glycerol of vegetable origin; and
mixing the powder and the glycerol to form a slurry having a dynamic viscosity that is below 2000 mPa-s at 90 degrees Celsius, wherein the powder and the glycerol are mixed at a ratio 1-10 parts by weight glycerol per 1-5 parts by weight of powder.