Biomass Pyrolysis Processes: Performance Parameters and Their Influence on Biochar System Benefits
Year: 2009
Type: dissertation
Abstract: No. of words in the main text of Thesis 17816 This study focuses on performance of biomass pyrolysis processes for use in biochar systems. Objectives are to understand the range of control of such processes and how this affects potential benefits of pyrolysis biochar systems, in particular for climate change mitigation. Slow, intermediate and fast pyrolysis processes are reviewed. Product yield distributions change depending on feedstock composition and preparation, control of temperature and material flows. These allow some control over distribution of main products – char, liquids and gases. Typical yield ranges for pyrolysis processes are defined. Variability associated with char yield is estimated at ±5 % (relative). Char yield should be considered an underlying, but minor source of variability in pyrolysis biochar systems. A model study is used to compare effects on greenhouse gas balance and electricity generating capability of slow, intermediate and fast pyrolysis processes with direct combustion; there is a trade-off between these benefits following from the different product yield distributions. High char yields allow greater net CO2 benefits but lower
Source: ERA
Author: Peter Brownsort
Language: English
Subfield: Fuel Technology
Field: Energy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2146999584