The 9.6 % from sawdust (Poplar) at 300

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The
effect of temperature on the yield of pyrolysis oil and pyrolysis char was
performed on the rice husk, bagasse, sawdust (Tali) and sawdust (Poplar) with
or without the catalyst at different pyrolysis temperature ranges from (250-500

) has been
depicted from the graph 4.1 and gas yield was determined by difference. As
shown in the graph four different type of feedstock gives different ranges from
(12.66-32.39 %) of bio-oil yield. The yield of bio-oil has been increased from
(13.07 % to 32.39 %) in (bagasse) feed by increasing temperature from (300 C to
500

) in the
presence of a catalyst. Other three biomasses show the same trend. Maximum
yield of bio-oil can be achieved at higher optimum temperature for the
different type of feedstock. Each feedstock has different chemical
compositions. However minimum yield of bio-oil 12.06 % has been obtained from
sawdust (Tali) at 450

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.       

Maximum
yield of char has been achieved at lower temperature depending on the type of
the feedstock. Hence high yield of char is obtained 32.79 % from (rice husk)
feed at 350

. Lower yield of
char is obtained 9.6 % from sawdust (Poplar) at 300

 in the presence of a catalyst that is shown in
figure 4.2. Therefore it is stated that from the results that char yield
decreased from 32.79 % to 28.88 % by increasing temperature from (350-500

) in rice husk
feed, char yield decreased from 23.07% to 19.71% by increasing temperature from
(300-500

) in bagasse,
char yield decreased from 31.21% to 16% by increasing temperature from (250-450

) in sawdust
(Tali) and char yield enhanced from 9.6 % to 17.33% by increasing temperature
from (300-500

) in sawdust
(poplar).       

 

The effect of temperature on the yield of pyrolysis
products with catalyst (a) Bio-oil Yield% and (b) Char Yield% from rice husk,
bagasse, sawdust (Tali) and sawdust (Poplar) at three different temperatures
(continuous sweep gas flow rate 0.15 lit/min)

The
effect of temperature on the yield of bio-oil and char yield without catalyst
was performed on rice husk, bagasse and sawdust (Tali) at the same temperature.
It is observed from the graph 4.3 that maximum yield of bio-oil was 24.37 %
achieved by bagasse and the minimum yield of bio-oil was obtained of 14 % by
rice husk in the absence of a catalyst at 300 temperature.

Conversely,
maximum yield of char was 36% obtained by rice husk and the minimum char yield
of bagasse sawdust (Tali) was (17.5% and 15 %) achieved at same temperature
which is shown in graph 4.4. 

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