Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 222, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2020.113253
Keywords
Macroalgae; Crudebio-oil; Sustainability; Pyrolysis; Environmental impacts
Categories
Funding
- National Natural Science Foundation of China [NSFC11572057, NSFC11832007]
- National Science-Technology Support Plan Projects of China [2015BAD21B00]
- start-up funds for high-end talents of Chengdu University
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Due to the negative environmental impacts of fossil fuels and the increasing global energy demands, biofuels are receiving increasing attention as the best short-term substitute for petroleum. Recently, thermochemical con version of seaweeds is in industrial focus to obtain high-value products with more potential applications than the conventional raw material. Beside biofuel production and due to their autotrophic growth, seaweeds are receiving a great attention in the field of bioremediation. Thus, pyrolysis of seaweeds is a promising approach for renewable bio-oil production with positive environmental impacts. However, a pretreatment drying step is required to improve the conversion process of the biomass. Application of electro-osmotic dewatering as well as on-site mechanical dewatering methods prior to the drying process were reported as useful techniques to reduce the energy requirements. On the other hand, the bio-oil produced from pyrolysis of seaweeds usually has high contents of oxygen-, nitrogenand sulphur-containing compounds, which should be as minimum as possible to enhance the bio-oil stability and reduce NOx and SOx emissions. The present review introduces a suggested route combining a number of technologies that create an economically-feasible process for conversion of seaweeds to high-grade crude bio-oil through pyrolysis. In addition, the paper sheds light on the environmental impacts and economic feasibility of the crude bio-oil production from seaweeds. The current status and challenges related to pyrolysis, as well as future perspectives for enhanced conversion and upgraded bio-oil production, are discussed.
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