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Graphite production from biomass

A technology of biomass and graphite, applied in the direction of graphite, petroleum industry, carbon compounds, etc.

Inactive Publication Date: 2017-11-28
CARBONSCAPE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] There is considerable concern about current levels of greenhouse gas emissions and the effect these may have on the global climate

Method used

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  • Graphite production from biomass
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example

[0247] The invention will now be described in more detail with reference to the following non-limiting examples.

example 1

[0248] Example 1 - Production of Hydrothermal Charcoal from Biomass

[0249] Materials and Methods

[0250] An electrically heated Amar brand, hydrothermal carbonization (HTC) high-pressure reactor rated at 1.5kW, 500C, 350 bar was used to thermally decompose raw material into semi-porous, partially carbonized charcoal (hydrothermal charcoal). This process removes oxygen and associated volatile species. Volatile substances (tars, water-soluble compounds) can be recovered as value-added biochemicals. PID temperature controller connected to ceramic heater with power supply.

[0251] The method used to generate hydrothermal charcoal is as follows:

[0252] a. 50g of biomass (radiata pine sawdust), 90ml of deionized water and 10ml of acetic acid were introduced into the HTC reactor;

[0253] b. Seal and bolt the reactor;

[0254] c. Heating started from ambient temperature to 350°C and held at 350°C for 20 minutes. Pressure = 165 to 170 bar;

[0255] d. The reactor is quenc...

example 2

[0265] Example 2 - Introduction of Catalyst into Hydrothermal Charcoal and Graphitization

[0266] Materials and Methods

[0267] The graphitization reactor included a Cobcraft electric furnace (ceramic kiln) rated at 3 kW, 1300C, 1 ATM. The graphitization reactor uses a PID temperature controller and contains a fused silica sample holder. An inert atmosphere was provided by nitrogen feed at 12 L / min.

[0268] The method used to introduce catalysts into hydrothermal charcoal is as follows:

[0269] a. Iron (III) nitrate, 404 g / mole. Dilute to 0.1M with H20;

[0270] b. Add 20g of hydrothermal charcoal into the solution;

[0271] c. Stir regularly. Let stand for about 12 hours to soak;

[0272] d. The hydrothermal charcoal is separated from the solution by decanting the solution;

[0273] e. Filter the solution through 1.5uM paper;

[0274] f. Dry the hydrothermal charcoal in a standard drying oven for 12-18 hours;

[0275] The method used for the graphitization of ca...

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Abstract

The present invention relates primarily to methods of production of graphite from biomass, char or tar. The invention also provides novel apparatus and catalysts for the production of graphite from carbon-containing materials. In particular embodiments, the invention relates to the production of graphite by hydrothermal treatment of biomass to produce tar or hydrochar and graphitisation to produce graphite.

Description

technical field [0001] The present invention relates to a method for the production of graphite from biomass, charcoal or tar. Background technique [0002] Graphite is one of four allotropes of crystalline carbon; the others are carbon nanotubes, diamond, and fullerenes. In graphite, carbon atoms are densely packed in layers of carbon atoms arranged in parallel stacks in a hexagonal arrangement in a planar fused ring system of layers. When the graphite structure is just a one-atom-thick flat plate, it is called graphene. Layers are stacked parallel to each other in a three-dimensional crystalline long-range order. There are two allotropes with different stacking arrangements: hexagonal and rhomboid. Graphite is gray to black in color, opaque and often metallic; sometimes it exhibits a dull earthy sheen. Graphite occurs naturally in metamorphic rocks and is a soft mineral (with a hardness of 1 to 2 on the Mohs scale) showing perfect basal (one-sided) cleavage. Graphite ...

Claims

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Application Information

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IPC IPC(8): C01B32/205
CPCC01P2002/60C01P2002/72C10M125/02C10M2201/041C10M2201/0413C10N2020/06C01B32/20C01B32/205C01P2002/70C01P2006/40B01J27/10B01J27/25C01P2004/62C10J2300/094
Inventor 格雷戈里·托马斯·康纳伊恩·詹姆斯·米勒米雷娅·马凯斯·戈麦斯
Owner CARBONSCAPE
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