Authors : Ali Doorandish and Ghazanfari Moghaddam
Abstract: Cypress pruning residues have the potential to be converted to bio-oils using a pyrolysis process. In this research, cypress-pruning residues including ground particles of stems and leaves were separately pyrolysed to produce pyrolysis oil. A fixed-platform reactor equipped with a condenser was used for deriving pyrolysis oil from cypress pruning residues. The effect of pyrolysis and condensing temperatures on the yield of bio-oils were investigated and optimized using the RSM. The investigated reactor temperature ranged from 350-60°C and the condensing temperature ranged from-5-20°C. The results indicated that the thermal values of the bio-oil obtained from stem and leaf samples were 22.32 and 24.02 MJ kg–1, respectively which showed an increase of about 30% compared to the thermal values of their corresponding raw materials. The optimum operating reactor temperature was 523°C for the stem particles and 494°C for the leaves particles. The optimum condensing temperature for both leaves and stem particles was -12°C. At the optimum conditions, the yield of pyrolysis oil was (33% w/w) for the stem particles and (14% w/w) for the leaves particles.
Ali Doorandish and Ghazanfari Moghaddam, 2020. Optimizing Factors Affecting Oil Yield Derived from Pyrolysis of Cypress Pruning Residues Using Response Surface Methodology. Journal of Engineering and Applied Sciences, 15: 2234-2241.