Classification of macroalgae as fuel and its thermochemical behaviour

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Abstract: 

A preliminary classification of five macroalgae from the British Isles; Fucus vesiculosus, Chorda filum, Laminaria digitata, Fucus ser- ratus, Laminaria hyperborea, and Macrocystis pyrifera from South America, has been presented in terms of a Van Krevelen diagram. The macroalgae have been characterised for proximate and ultimate analysis, inorganic content, and calorific value. The different options for thermal conversion and behaviour under combustion and pyrolysis have been evaluated and compared to several types of terrestrial bio- mass including Miscanthus, short rotation Willow coppice and Oat straw. Thermal treatment of the macroalgae has been investigated using thermogravimetry (TGA) and pyrolysis-gc-ms. Combustion behaviour is investigated using TGA in an oxidising atmosphere. The suitability of macroalgae for the different thermal processing routes is discussed. Ash chemistry restricts the use of macroalgae for direct combustion and gasification. Pyrolysis produces a range of pentosans and a significant proportion of nitrogen containing com- pounds. High char yields are produced.

Author(s): 
A.B. Ross
J.M. Jones
M.L. Kubacki
T. Bridgeman
Keywords: 
Combustion
Fuel analysis
Macroalgae
Marine biomass
Pyrolysis
Link / Ref: 
Pubmed
Attachment: 
PDF icon Classification of macroalgae as fuel and its thermochemical behaviour.pdf
Article Source: 
Bioresource Technology 99 (2008) 6494–6504
Category: 
Basic Biology
Seaweed composition
Uses of Seaweeds: Fuel or Energy