Use of muffle furnace for biochar production, with or without adding additional nitrogen, how does it is gonna affect the biochar production. The nitrogen is used for creating an inert atmostphere, is it necessary to attach it while working with a muffle furnace or the specific desiging of muffle furnace is sufficient to meet the requirements?
Wood Bio char is produced by pyrolysis, with Nitrogen Therefore, nitrogen is purged to remove any gases (O2 etc.) present in pyrolysis reactor and also, to provide inert atmosphere. The idea is to control the heating process such that carbon loss to carbon dioxide is minimized therefore minimizing loss of fixed carbon to environment, use of nitrogen helps to reduce the burning of the pyrolysis product thereby improving the yield.500℃ of pyrolysis temperature is used to make wood . The biochar fixed carbon contents increased with increasing feedstock treatment temperatures. Typical oxygen to carbon ratios (O:C) are between 0.2 and 0.6, which are called char or charcoal, depending on the position in the black carbon spectrum. If no oxygen is present combustion does not occur, rather the biomass thermally decomposes into combustible gases and bio-char
Nitrogen Enrichment: Nitrogen-enriched biochars have been shown to reduce volatilizations of ammonia (NH3) from fertilized agricultural soils. This can increase the use-efficiencies of the applied nitrogen, leading to improved soil fertility and crop yields.
However, whether nitrogen is necessary or not depends on the specific design of the muffle furnace and the requirements of the biochar production process. Some muffle furnaces may already support a controlled atmosphere, making the addition of nitrogen unnecessary.
The usual method on a small lab scale is to restrict air access rather than to continuously purge with N2
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