Biochar/Brick Co-production System: Difference between revisions
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The idea is to couple the production of [[biochar]] with the production of fired bricks, analogous to the [http://opensourceecology.org/wiki/Biochar-Lime_Co-production_System Biochar/Lime Co-Production System]. The pyrolysis gas generated during biochar production is not flared off but used to fire the clay bricks. The process is thus carbon-negative. This type of production needs relatively close ('round the clock) monitoring but there is potential for automation. Heat is another co-product that could be used for space heating, greenhouses, etc. | |||
Heat is another co-product that could be used for space heating, greenhouses, etc. | |||
* see: (Chinese) [[Vertical Shaft Brick Kiln]] | * see: (Chinese) [[Vertical Shaft Brick Kiln]] | ||
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==Development Proposal== | ==Development Proposal== | ||
*proposal: carbon-negative VSBK fired with pyrolysis gas (with [[biochar]] as a co-product) | *proposal: carbon-negative VSBK fired with pyrolysis gas (with [[biochar]] as a co-product) | ||
*The typical VSBK is coal-fired, mostly using low-quality coal fines. As shown in the (Vimeo) animation above, pieces of coal are scattered onto the bricks from the top. The brick kiln could be re-designed as part of a [[pyrolysis]] system to run on the pyro-gas | *The typical VSBK is coal-fired, mostly using low-quality coal fines. As shown in the (Vimeo) animation above, pieces of coal are scattered onto the bricks from the top. The brick kiln could be re-designed as part of a [[pyrolysis]] system to run on the pyro-gas. | ||
*This gas-fired kiln would have cleaner emissions than the coal-fired one (less soot, heavy metals, organic pollutants, etc.). The off-gas could conceivably be used for CO2 enrichment in a [[greenhouse]] or garden/field (this may require a [[biofilter]] step first). | *This gas-fired kiln would have cleaner emissions than the coal-fired one (less soot, heavy metals, organic pollutants, etc.). The off-gas could conceivably be used for CO2 enrichment in a [[greenhouse]] or garden/field (this may require a [[biofilter]] step first). | ||
*Co-products in addition to bricks: [[biochar]], heat, CO2-rich gas for greenhouses. | *Co-products in addition to bricks: [[biochar]], heat, CO2-rich gas for greenhouses. | ||
Revision as of 11:39, 18 April 2016
The idea is to couple the production of biochar with the production of fired bricks, analogous to the Biochar/Lime Co-Production System. The pyrolysis gas generated during biochar production is not flared off but used to fire the clay bricks. The process is thus carbon-negative. This type of production needs relatively close ('round the clock) monitoring but there is potential for automation. Heat is another co-product that could be used for space heating, greenhouses, etc.
- see: (Chinese) Vertical Shaft Brick Kiln
Development Proposal
- proposal: carbon-negative VSBK fired with pyrolysis gas (with biochar as a co-product)
- The typical VSBK is coal-fired, mostly using low-quality coal fines. As shown in the (Vimeo) animation above, pieces of coal are scattered onto the bricks from the top. The brick kiln could be re-designed as part of a pyrolysis system to run on the pyro-gas.
- This gas-fired kiln would have cleaner emissions than the coal-fired one (less soot, heavy metals, organic pollutants, etc.). The off-gas could conceivably be used for CO2 enrichment in a greenhouse or garden/field (this may require a biofilter step first).
- Co-products in addition to bricks: biochar, heat, CO2-rich gas for greenhouses.