High-yield charcoal production by two-step pyrolysis

摘要: Abstract Low temperature isothermal pyrolysis of Thuja (Tetraclinis articulata) wood samples was carried out at atmospheric pressure. Changes in the fixed-carbon yield over time revealed existence two distinct phases. The first phase concerned hemicelluloses and cellulose decomposition. During that phase, char formation promoted by low temperatures. At end maximum. value maximum as great obtained under high-pressure approached theoretical value. second pyrolysis, decreased, showing a loss already existing carbon. But rise immediately helped to preserve reached This novel temperature–time profile (low followed temperature) constitute two-step whole biomass which resolved dilemma increasing charcoal quality without excessively decreasing yield.