چكيده به لاتين
The pyrolysis process is one of the methods for managing cellulosic waste. Pyrolysis is one of the methods used to produce fuel for replacing fossil fuels from carbon materials (biomass), and to Coping with pollution and global warming. biomass is a renewable carbon source that can be converted into solid and liquid carbon-rich by pyrolysis process . By the pyrolysis process, the biota can be transformed into a valuable product. Therefore, understanding the mechanism of performance and the occurrence of reactions, as well as understanding its influens from operational conditions, seems necessary to improve and optimize the process. This research is aimed at designing a fixed bed pyrolysis system and studying the pyrolysis of two biomass samples of almond shells and plane tree leaf. All designs are based on maximum biochar efficiency. The reactor is fixed bed and type stainless steel. Designed reactor with an internal diameter of 3.8 cm and a height of 32 cm. The designed furnace has an electric power of 2 kW and a temperature rate of 20 ° C / min. The system also has a condenser white 9.9527 kW thermal power. In the next step, the parameters affecting the pyrolysis process of two biomolecules (almond shells, plan tree leafs) have been investigated empirically. The effect of temperature parameters ranged from 300 to 550 ° C, the nitrogen gas flow rate was from 0.4 to 2.2 l / min, the biological size was 0.5 to 2.36 mm, and the effect of biomass from 20 gr to 60 on the yield of the products was investigated. The results show that with increasing temperature and increasing nitrogen gas flow, the biochar efficiency decreases. It is also evident from the results that by increasing the particle size to 2 mm, the biochar yield decreases and after 2 mm the efficiency increases slightly. The highest biochemical yield of Almond shell was in the size of particles ranging from 0.5 to 0.8 mm and equal to 27.46%. In the next section, a number of biocarbon samples were activated using NaOH and were used to absorb mitochondria and rhodamine-B. The surface area of almond shell biochar Increased from 6.4 m2/g to 615.04 m2/g after activation. The adsorption results showed that the activated carbon produced from biochar with the size of 0.5-.8 mm had the highest adsorption in both methylene blue and rhodamine-B solutions, respectively, and their absorbance was 38.78 mg / g, and 18.87 mg / g.
Keywords: Pyrolysis, Biomass, Design, Fixed bed reactor, Activation.
