首页|Pyrolysis of low-value waste miscanthus grass: Physicochemical characterization,pyrolysis kinetics,and characterization of pyrolytic end products
Pyrolysis of low-value waste miscanthus grass: Physicochemical characterization,pyrolysis kinetics,and characterization of pyrolytic end products
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NSTL
The current study explored the bioenergy potential of waste miscanthus grass(WMG).The kinetic study of WMG was evaluated via two model-free methods,in a thermogravimetric analyzer(TGA),at dynamic heating rates under an inert ambiance.The pyrolysis was performed in a semi-batch fixed bed reactor at 500 oC,80 oC min heating rate,and 1 mm particle size.The evolution of hot vapours during pyrolysis was explored using a TGA-FTIR analyzer.Finally,the bio-oil and biochar were characterized by their physico-chemical properties.The kinetic results established that WMG followed a multi-step decomposition process,and the average activation energy gained from KAS and ST was found to be 197.66 and 179.64 kJ mol-1,respectively.TGA-FTIR study revealed the foremost release of carbon dioxide(28.22%),followed by a car-bonyl(25.40%),and ether(19.12%).Further,the pyrolysis of WMG yielded 29.32 wt% of bio-oil at the optimized condition whereas,physicochemical results of bio-oil established; 65.16% carbon content,26.16 MJ kg~(-1)HHV,34.15 cP viscosity,and 812 kg m~(-3)density.GC-MS study of bio-oil confirmed the maximal release of hydrocarbons and phenols.Finally,characterization results of miscanthus grass biochar(MGB)demonstrated an excellent feedstock for industrial and domestic applications.
NSTL
