Developing a new carbonization process using high pressure and temperature to treatmedical and municipality wastes for coal production

摘要

A new process of carbonization was used to carbonize different waste such as expired drugs, wood, fruits, and polymer of β-cyclodextrin. The carbonization process was performed at 400 0C and under pressure of 10 bars. The chars obtained were characterized and compared to the commercial activated charcoal. Mercury porosimetry and nitrogen adsorption were used to characterize the specific surface and porosities of the chars obtained by the carbonization of the four products. The surface area is lower for the fruit (SBET = 13 m2/g) than for the drugs, wood and polymer samples (SBET = 285,150, 40 m2/g respectively). The char obtained from expired drugs represent a relatively large surface area without any treatment, traditionally followed to prepare activated charcoal. The different samples have similar macropore diameters with mean values between 30 and 40 μm. The specific surface of the expired drug coal was relatively important and triggered a curiosity to develop the characterization studies of this type of coal.