Abstract
In the present work, effects of process conditions on char and fixed carbon yields from four woody biomasses were studied. The influence of the particle size, sample mass, and pressure on experimental values of char and fixed carbon yields from spruce stem wood, spruce forest residue, birch stem wood, and birch forest residue were examined in three thermogravimetric analyzers (TGAs) (two atmospheric and one pressurized) and a flash carbonizer. The obtained experimental fixed carbon yields were then compared to theoretical values calculated using the elemental composition of the studied woody biomasses. It was found that carbonization of small samples of small particles in atmospheric TGAs in an open crucible/pan offered the lowest fixed carbon yield. The yields were improved when following standard proximate analysis procedures employing closed crucibles. Further enhancement of the fixed carbon yields were obtained in the atmospheric TGAs using a crucible covered by a lid that restricts release of volatil...
Highlights
Extensive use of fossil fuels has caused substantial greenhouse gas emissions and environmental problems
The specific scope of the present study is to study the effect of carbonization process conditions on char and fixed carbon yield of woody biomasses including spruce stem wood, spruce forest residue, birch stem wood and birch forest residue
It enables us to calculate the fixed carbon yield yfc realized in the proximate analysis
Summary
Liang Wang* a, Øyvind Skreiberg a, Sam Van Wesenbeeck b,c, Morten Grønli d, Michael Jerry. Hawaii Natural Energy Institute, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, Hawaii 96822 c d.
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