TY - JOUR T1 - Optimizing Factors Affecting Oil Yield Derived from Pyrolysis of Cypress Pruning Residues Using Response Surface Methodology AU - Doorandish, Ali AU - Moghaddam, Ghazanfari JO - Journal of Engineering and Applied Sciences VL - 15 IS - 10 SP - 2234 EP - 2241 PY - 2020 DA - 2001/08/19 SN - 1816-949x DO - jeasci.2020.2234.2241 UR - https://makhillpublications.co/view-article.php?doi=jeasci.2020.2234.2241 KW - Pyrolysis KW -biomass KW -bio-oil KW -cypress KW -optimization AB - 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. ER -