Pyrolysis of wood and bamboo wastes environmentally friendly to produce acetic acid

Abstract

The research goal is to produce liquid smoke through pyrolysis process and to get fractions of potential chemical components from woods and bamboo wastes. These raw materials contain adequate hemicellulose, cellulose and lignin. These studies revealed relationship between type of raw materials and compound composition of liquid smoke products. Results of this research are expected to give benefits as follows: (1) Liquid smoke produced from wood and bamboo wastes through pyrolysis process is able to diversify preservative products, aplication of liquid smoke was done at tuna fish and tofu, (2) Model of pyrolysis kinetics was established from Arrhenius and Tsamba equations to observe influence of pyrolisis time and resident time. From calculation of kinetics constant, it can be calculated activation energy (Ea), pre exponential factor (A), half-life time (t½), while, pyrolysis thermodynamics was obtained from entropy, enthalpy and Gibbs free energy changes. From the three liquid smoke produced from pyrolisis of these raw materials, liquid smoke of bamboo gave the highest liquid smoke residue as much as 61.34%, followed by liquid smoke pine tree by 49.60 % and liquid smoke of teak tree produced 43.78%. This indicated that liquid smoke residue produced during pyrolisis process was dependend on the types of raw materials used. Identification of GC-MS of teak, pine and bamboo dust could provide compounds that mostly derived from acid is group of dominant volatile compounds. Identification of compound group of phenol, acid, ester, ketone, alcohol, furan and so on, then followed by separation process to determine acetic acid compound that potential to be used as natural preservative. Its difference is Arrhenius model focused discussion on the impact of temperature to the kinetics constant in form of particle size without heating rate. Tsamba model focused discussion to the impact of pyrolisis temperature to the yield, pre exponential factor and reverse to the heating rate.