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Flash vacuum pyrolysis (FVP) is a technique in organic synthesis. It entails heating a precursor molecule intensely and briefly. Two key parameters are the temperature and duration (or residence time), which are adjusted to optimize yield, conversion, and avoidance of intractable products. [1]
Flash vacuum pyrolysis, used in organic synthesis. Other pyrolysis types come from a different classification that focuses on the pyrolysis operating conditions and heating system used, which have an impact on the yield of the pyrolysis products.
These two sets of chemistries, pyrolysis and catalytic processing, are combined to form the reactive flash volatilization process. Solid hydrocarbons or biomass are contacted with high temperature (500–900 °C) catalysts to generate gases and volatile organic compounds. [2]
Pyrolysis is the thermal decomposition of materials in an inert atmosphere or a vacuum. The sample is put into direct contact with a platinum wire, or placed in a quartz sample tube, and rapidly heated to 600–1000 °C. Depending on the application even higher temperatures are used.
Flash vacuum pyrolysis often utilize a fused quartz tube, usually packed with quartz or ceramic beads, which is heated at high temperatures. References This ...
If isolation or reaction of an elusive diene or dienophile is the goal, one of two strategies may be used. Flash vacuum pyrolysis of Diels–Alder adducts synthesized by independent means can provide extremely reactive, short-lived dienophiles (which can then be captured by a unique diene). [11]
An aerial view of the Kayenta Solar Plant in Kayenta, Arizona, part of a project backed by the Department of Energy to bring clean power to communities off the main electrical grid.
Pyrolysis of anhydrides and intramolecular hydrogen transfer in a propiolic acid can also make alkylidene ketenes. This particular transformation is believed to go through a propiolaldehyde intermediate that generates acetylene via carbon monoxide loss. [13] Methylene ketene from flash vacuum pyrolysis of acrylic anhydride [13]