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Progression of Pyrolysis
Well designed continuous process systems can be self-sustaining
1
1.Optimal Zone for energy extraction
2
2. Complete devolatilization
Requires addition of energy (and/or oxygen)
Our investment for a sustainable planet
To maximize carbon storage mankind should use Zone 1
Zone 2 is best for microbial life
 
The implications of utilizing the exothermic zone is that once started, biomass pyrolysis systems need not be energy consumers but rather when integrated into other processes can utilize heat as well as produce excess heat in a self sustaining mode.
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The next idea is that there are two inflection points on the rate of weight loss curve.  The beginning of the start of the exothermic range and the second inflection point is where rate of weight loss slows and the process tapers off to completion.
Depending on particle size, zone 1 can be in minutes, seconds or hours for logs.  However, if there is no additional heat input from flames or glowing combustion of charcoal. The process will not extend far into zone 2.
For extraction of oils for energy and co-products, the area under the curve in zone 2 has the highest cost.   If we consider that zone one is the optimal area for mankind’s utilization, then area under the curve in zone two may be Nature’s optimal are. It is as a small investment to provide a significant solution to reduce greenhouse gases, create a growing carbon sink, and the development of a sustainable world.