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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 319Microwave Induced Pyrolysis of Biomass

Microwave Induced Pyrolysis of Biomass

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Abstract:

Microwave heating has attracted much attention recently due to its nature of volumetric heating and instant heating. In this study, microwave heating was adopted not only as a heating method but also an approach to enhance the pyrolysis of biomass. Microwave induced pyrolysis was carried out at 500°C with silicon carbide as a microwave energy absorber. Conventional pyrolysis of gumwood was also conducted under the same operating temperature as microwave-enhanced pyrolysis. The yields of pyrolytic bio-oil and bio-gas under microwave heating are 8.52 wt% and 73.26 wt% respectively, which are higher than the products obtained via conventional methods under similar operating conditions. A series tests were performed to compare the difference between the yields of pyrolytic products, i.e. gaseous products (bio-gas), liquid products (bio-oil) and solid products( bio-char). Scanning Electron Microscope (SEM), Gas Chromatograph/Mass Spectrum (GC-MS) and Gas Chromatograph (GC) were used in this study to characterize the morphology of bio-chars, the composition of bio-gas and bio-oil respectively. The bio-oil produced via microwave pyrolysis has simpler constituents compared with that produced via conventional pyrolysis. The proportion of syngas (H2+CO) and methane (CH4) in the gas product produced under microwave-enhanced pyrolysis are 62.52 vol % and 22.41vol % respectively, which are higher than those in the products of conventional pyrolysis. It is clear that microwave-enhanced pyrolysis has shown a great potential as an alternative method for biomass conversion.

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Chemical, Mechanical and Materials Engineering II

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Periodical:

Applied Mechanics and Materials (Volume 319)

Pages:

127-133

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.319.127

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Online since:

May 2013

Authors:

Kai Qi Shi, Tao Wu, Hai Tao Zhao, Edward Lester, Philip Hall, Yao Dong Wang

Keywords:

Biomass, Conventional Pyrolysis, Microwave Heating, Pyrolysis

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