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Influence of graphite/alumina on co-pyrolysis of Chlorella vulgaris and polypropylene for producing bio-oil

Author

Listed:
  • Chen, Chunxiang
  • Zhao, Jian
  • Wei, Yixue
  • Huang, Xiaodong
  • Lu, Wei
  • Fan, Dianzhao
  • Bi, Yingxin
  • Qiu, Hongfu

Abstract

The effects of Graphite/Alumina (GP/Al2O3) compound additives with different addition amounts (10%, 20%, 30% and 40%) and different mixing ratios (10:0, 7:3, 5:5, 3:7 and 0:10) on co-pyrolysis characteristics, product yield and bio-oil components of Chlorella vulgaris (CV) and polypropylene (PP) were studied by microwave thermogravimetry and GC-MS. The results indicated that compared with the C8P2 (CV:PP = 8:2) group, 30% G10A0 (GP:Al2O3 = 10:0) could greatly improve pyrolysis efficiency, but the contents of hydrocarbons and alcohols in bio-oil decreased and the content of acids increased. 40% G0A10 could increase the content of hydrocarbons and decrease the content of phenols in bio-oil, but the yield of bio-oil was 3.16% lower than that of C8P2 group. For 40% compound additive groups, GP/Al2O3 could increase the production of bio-oil without increasing energy consumption, and the contents of hydrocarbons and alcohols in bio-oils increased. The maximum contents of hydrocarbons and alcohols appeared in the 40% G7A3 group, 29.56% and 34.60% respectively. In addition, alkyl-cyclohexane accounted for 65.95% of hydrocarbons in 40% G7A3 group. Therefore, the content of alkyl-cyclohexane can be controlled purposefully to be used in chemical fields such as organic synthesis and preparation of antistatic coatings, so as to expand the application of bio-oil.

Suggested Citation

  • Chen, Chunxiang & Zhao, Jian & Wei, Yixue & Huang, Xiaodong & Lu, Wei & Fan, Dianzhao & Bi, Yingxin & Qiu, Hongfu, 2023. "Influence of graphite/alumina on co-pyrolysis of Chlorella vulgaris and polypropylene for producing bio-oil," Energy, Elsevier, vol. 265(C).
    • Handle: RePEc:eee:energy:v:265:y:2023:i:c:s0360544222032480
    DOI: 10.1016/j.energy.2022.126362
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    2. Krishnamoorthy, Amarnath & Rodriguez, Cristina & Durrant, Andy, 2023. "Optimisation of ultrasonication pretreatment on microalgae Chlorella Vulgaris & Nannochloropsis Oculata for lipid extraction in biodiesel production," Energy, Elsevier, vol. 278(PB).

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