Both gasification and pyrolysis require dried biomass as feedstock, and the processes occur in an environment higher than 600C. The hydrothermal process involves direct liquefaction of biomss, with the presence of water and perhaps some catalysts, to directly convert biomass into liquid oil, with a reacting temperature of less than 400C. Historically speaking The development of TCC technologies has always been linked to the energy shortage. When this technology is fully developed, the annual human and animal waste in the United States could yield more than 200 million barrels of crude oil, with a net zero carbon dioxide emission to the environment.
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