[Stoves] Fuel production, biochar, and feeding the stove in 2040
crispinpigott at gmail.com
Tue Aug 23 09:24:24 PDT 2011
I am posting this to the stoves group but it also concerns biochar from two
processes, pyrogenic char and hydrochar. The former is what stoves produce.
It confirms that biomass (trees and grasses) grow significantly faster (10%)
under estimated CO2 concentrations for the year 2040. This is confirmation
of other work that agricultural production which increased since 1950 is
partly attributable to increased CO2.
It means that within a generation, the management of woodlots for stove
fuels will be easier, and the area needed per family, smaller.
Grasses were grown at elevated CO2 levels.
"Scientists observed a 10% increase in carbon sequestration in biomass but
no increase in the carbon content in the soil."
"A new experiment is underway in which scientists seek to determine if and
how biochar, synthesized by pyrolysis of biomass, can be used for long-term
carbon sequestration in soils and, as a benefit, increase soil fertility.
They are using this experiment to evaluate the effects of two different
chars, a pyrogenic biochar and a hydrochar produced via hydrothermal
carbonization, their common feedstock (Miscanthus) as well as a "no
addition" control. They are interested in the impact and fate of biochar and
hydrochar with respect to N2O and CO2 emissions, plant growth, and carbon
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