Microwave enhanced pyrolysis of gumwood

Kaiqi Shi, Tao Wu, Jiefeng Yan, Haitao ZHAO, Edward Lester

Research output: Chapter in Book/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

Microwave pyrolysis of biomass has gained increasing interests due to the fact that microwave heating provides a volumetric heating and instant heating at improved heating efficiencies compared with conventional heating techniques. Microwave-enhanced heating has become one of the research focuses attracting widespread concerns. In this study, microwave-enhanced pyrolysis of gumwood was carried out at 500°C with silicon carbide as a microwave absorber. Conventional pyrolysis of gumwood was also studied under the same conditions of microwave-enhanced pyrolysis. The yields of pyrolytic products, morphology of bio-char, and composition of bio-oil and biogas are analyzed by using Scanning Electron Microscope, Gas Chromatograph / Mass Spectrum and Gas Chromatograph respectively. According to the Table 1, 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. In microwave enhanced pyrolysis, numerous carbon nano tubes (CNTs) are formed on the surface of the bio-char, as shown in Figure 1. These CNTs are grown from pyrolysed round particles without the use of specific catalysts, substrates and source gases. The bio-oil obtained by microwave pyrolysis has simpler constituents compared with conventional pyrolytic bio-oil. The proportions of syngas (H2+CO) and methane (CH4) in microwave pyrolytic gas product are 62.52 vol.% and 22.41vol.% respectively, whose high heating value are 30% higher than that of conventional pyrolytic gas. It is clear that microwave enhanced pyrolysis has shown its potential as an alternative method for biomass conversion.

Original languageEnglish
Title of host publicationICMREE 2013 - Proceedings
Subtitle of host publication2013 International Conference on Materials for Renewable Energy and Environment
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages223-227
Number of pages5
ISBN (Electronic)9781479933365
DOIs
Publication statusPublished - 2013
Event2013 International Conference on Materials for Renewable Energy and Environment, ICMREE 2013 - Chengdou, China
Duration: 19 Aug 201321 Aug 2013

Publication series

NameICMREE 2013 - Proceedings: 2013 International Conference on Materials for Renewable Energy and Environment
Volume1

Conference

Conference2013 International Conference on Materials for Renewable Energy and Environment, ICMREE 2013
Country/TerritoryChina
CityChengdou
Period19/08/1321/08/13

Keywords

  • biomass
  • gumwood
  • micrwave
  • pyrolysis

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology

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