Journal
GLOBAL CHANGE BIOLOGY BIOENERGY
Volume 5, Issue 2, Pages 144-152Publisher
WILEY-BLACKWELL
DOI: 10.1111/gcbb.12021
Keywords
biochar; bioenergy; calorific value; microwave; pyrolysis; torrefaction
Funding
- European Regional Development Fund Programme in Yorkshire the Humber
- EPSRC
- EU
- Ministerio de Ciencia e Innovacion [JCI-2011-10836]
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The energy efficiency of torrefaction/pyrolysis of biomass to fuel/biochar was studied using conventional (slow) and microwave (low temperature) pyrolysis. Conventional pyrolysis is approximately three times as energy efficient as microwave pyrolysis, in terms of the energy required to process a unit of feedstock. However, this is more than compensated for by the higher energy content of the condensable and gaseous coproducts from microwave pyrolysis, as these can be utilized to generate the electricity required to drive the process. It is proposed that the most efficient method of torrefaction/biochar production is a combination of conventional heating with catalytic' amount of microwave irradiation.
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