The research interest and practical application to use renewable biomass for energy and materials production has increased especially for pyrolysis technology where microwave-assisted pyrolysis provides a promising route for bio-oil and bio-char production. Experiments on rice straw have been carried out to check the effect of carries gas and additive (base and acid) on product distribution. The characteristics of the bio-oils and bio-chars produced and the overall changes in composition were investigated by 13C CP/MAS NMR, GC-MS, together with elemental analyses. The results indicate that maleic acid is favor for obtaining bio-char with high carbon contents (>60%). Bio-oils with high furfural contents can be obtained via mineral acid catalysis. Overall, the bio-oil can be described as a mixture of water, volatile acids, aldehydes and ketones, pyrans and furans, sugars, phenyl and lignin derivatives. The carbon distributions of the bio-oils and bio-chars provide mechanistic information on the overall extent of aromatisation that has occurred and how this is affected by acid catalysis.Keywords:  Biomass, Microwave-assisted Pyrolysis (MAP), Bio-oil, Bio-char, 13C CP/MAS NMR

Characterization of bio-oil and bio-char produced from microwave-assisted pyrolysis of biomass

248th National Meeting (2014)

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