The small-scale experimental results were leveraged for validation
of the yield of the industrial-scaled system. Rotary kiln drying
operated with natural gas, with an efficiency of 85% [68], was used
in the industrial-scale system to drive off the excess water before
pyrolyzing the biomass as it represents an efficient and commercially
demonstrated technology [69]. In the industrial-scale system,
the pyrolysis reactor energy is supplemented through
intersystem energy recovery and combustion of by-products, char
and gasses, with HHVs of 25.4 MJ kg1 and 7.3 MJ kg1, respectively.
A portion of the process gasses are compressed and recycled
back into the reactor to maintain an oxygen deprived system. After
the pyrolysis process, product gasses from the reactor are filtered
and heat is recovered through a heat exchanger with an 85% efficacy.
The recovered heat is used to preheat the gas and microalgae
mixture as it enters the reactor. A diagram of the industrial-scale
system with energy recovery pathways is presented in Fig. 3.
The small-scale experimental results were leveraged for validation
of the yield of the industrial-scaled system. Rotary kiln drying
operated with natural gas, with an efficiency of 85% [68], was used
in the industrial-scale system to drive off the excess water before
pyrolyzing the biomass as it represents an efficient and commercially
demonstrated technology [69]. In the industrial-scale system,
the pyrolysis reactor energy is supplemented through
intersystem energy recovery and combustion of by-products, char
and gasses, with HHVs of 25.4 MJ kg1 and 7.3 MJ kg1, respectively.
A portion of the process gasses are compressed and recycled
back into the reactor to maintain an oxygen deprived system. After
the pyrolysis process, product gasses from the reactor are filtered
and heat is recovered through a heat exchanger with an 85% efficacy.
The recovered heat is used to preheat the gas and microalgae
mixture as it enters the reactor. A diagram of the industrial-scale
system with energy recovery pathways is presented in Fig. 3.
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