The calorific values of solid and liquid yields consequenced by temperatures of mahogany pyrolysis

Due to the potential pyrolysis products to be bio- fuels, the pyrolysis yield products were measured its calorific indicating important-physical properties of fuel. The study aims to analyze the influence of different temperatures on the calorific value of pyrolysis by means of calorimetrical measurement. The biomass feedstock used was mahogany wood, and then it would be pyrolyzed in the slow pyrolysis experimental run. The pyrolysis temperatures were conducted from 250 °C to 800 °C and the heating rate at each process was 0.44 °C/sec. It was accompanied to proceed for 3 hours. The influence of temperature toward the solid (char) and liquid (tar) yields were examined by means of a bomb calorimeter. The result was presented by the potential products of mahogany wood pyrolysis in the mass and volume changes of char dan tar. Then, the char and tar were measured its calorific values. The calorific value of untreated mahogany wood (before pyrolyzed) were around 3700 kal/g, but the pyrolysis treatment significantly increased its calorific values in various pyrolysis temperatures. It referred that the calorific values of solid yields were pointed in the increasing values with the increasing of pyrolysis temperature, however, the calorific values of tar inclined up to temperature of 500 °C, however, it would decline because the density of tar become lower. The variance in calorific values could be attributed to the chemical composition of the mahogany wood; indeed, it was known a larger amount of carbon percentage. Furthermore, the percentage of carbon tends to increase in the pyrolysis wood.