Ali  Doorandish, Ghazanfari  Moghaddam, 
    Optimizing Factors Affecting Oil Yield Derived from Pyrolysis of Cypress Pruning Residues
Using Response Surface Methodology,
    Journal of Engineering and Applied Sciences,
    Volume 15,Issue 10,
    2020,
    Pages 2234-2241,
    ISSN 1816-949x,
    jeasci.2020.2234.2241,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2020.2234.2241)
    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<sup>&#150;1</sup>, 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&#176;C for the stem particles and
494&#176;C for the leaves particles. The optimum condensing
temperature for both leaves and stem particles was -12&#176;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.
    Keywords: Pyrolysis;biomass;bio-oil;cypress;optimization