Fast microwave-assisted pyrolysis of microalgae using microwave absorbent and HZSM-5 catalyst

Fernanda Cabral Borges, Qinglong Xie, Min Min, Luis Ant Ônio Rezende Muniz, Marcelo Farenzena, Jorge Otávio Trierweiler, Paul Chen, Roger Ruan

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

Fast microwave-assisted pyrolysis (fMAP) in the presence of a microwave absorbent (SiC) and catalyst (HZSM-5) was tested on a Chlorella sp. strain and on a Nannochloropsis strain. The liquid products were characterized, and the effects of temperature and catalyst:biomass ratio were analyzed. For Chlorella sp., a temperature of 550. °C, with no catalyst were the optimal conditions, resulting in a maximum bio-oil yield of 57. wt.%. For Nannochloropsis, a temperature of 500. °C, with 0.5 of catalyst ratio were shown to be the optimal condition, resulting in a maximum bio-oil yield of 59. wt.%. These results show that the use of microwave absorbents in fMAP increased bio-oil yields and quality, and it is a promising technology to improve the commercial application and economic outlook of microwave pyrolysis technology. Additionally, the use of a different catalyst needs to be considered to improve the bio-oil characteristics.

Original languageEnglish (US)
Pages (from-to)518-526
Number of pages9
JournalBioresource Technology
Volume166
DOIs
StatePublished - Aug 2014

Bibliographical note

Funding Information:
The authors are grateful to CNPq, CAPES, as well as DOT/Sun Grant, USDA/DOE, to the University of Minnesota IREE and Center for Biorefining for their financial support for this work.

Keywords

  • Bio-oil
  • Fast pyrolysis
  • Microalgae
  • Microwave
  • Model compounds

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