Oxidative torrefaction of microalgae Chlorella sorokiniana: Process optimization by central composite design

Charles B. Felix, Wei Hsin Chen, Jo Shu Chang, Young Kwon Park, Samrand Saeidi, Gopalakrishnan Kumar

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)

摘要

Microalgae are currently not viable as solid biofuels owing to their poor raw fuel properties. Torrefaction under oxidative media offers a cost-effective and energy-efficient process to address these drawbacks. A design of experiment was conducted using central composite design with three factors: temperature (200, 250, and 300 °C), time (10, 35, and 60 min), and O2 concentration (3, 12, and 21 vol%). The responses were solid yield, energy yield, higher heating value, and onset temperatures at 50% and 90% carbon conversion determined from thermogravimetric analysis. Temperature and time significantly affected all responses, while O2 concentration only affected higher heating value, energy yield and thermodegradation temperature at 90% conversion. Oxidative torrefaction of microalgae is recommended to be conducted at 200 °C, 10.6 min, 12% O2 where the energy yield and enhancement factor are 98.73% and 1.08, respectively. It is also more reactive under an air environment compared to inert torrefaction conditions.

原文English
文章編號129200
期刊Bioresource technology
382
DOIs
出版狀態Published - 2023 8月

All Science Journal Classification (ASJC) codes

  • 生物工程
  • 環境工程
  • 可再生能源、永續發展與環境
  • 廢物管理和處置

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