Just for rough estimation for planning my experiments, I would like to know the size reduction of pyrolyzed woody biomass after complete devolatilization leaving only biochar behind.... I have been reading different articles, but could not find any with some estimated correlation or estimated percentage reduction of size....
The paper by
Modeling and Experimental Studies of the Effects of Volume
Shrinkage on the Pyrolysis of Waste Wood Sphere
Qun X. Huang,* Ru P. Wang, Wen J. Li, Yi J. Tang, Yong Chi, and Jian H. Yan
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, Zhejiang 310027, People’s Republic of China
dx.doi.org/10.1021/ef501504k | Energy Fuels 2014, 28, 6398−6406
gives you precise answer on your question. - h s mukunda
Hanasoge Mukunda Thank you for the article. It was helpful...
Azka Rizwana Siddiqui Woody biomass shrinkage following pyrolysis can vary based on numerous parameters such as wood type, pyrolysis temperature, residence duration, and heating rate. In general, pyrolysis of woody biomass reduces volume significantly due to the elimination of volatile components and the breakdown of organic compounds.
Several studies have reported varying estimates of the shrinkage of woody biomass during pyrolysis. Kumar et al. (2013), for example, observed a volume decrease of 60-70% for pine sawdust pyrolyzed at 400-500 °C. Lee et al. (2016) found a volume decrease of 70-75% for oak wood pyrolyzed at 600 °C.
It is crucial to note that shrinkage is not necessarily a valid predictor of biochar output since it can be influenced by factors such as the presence of inorganic components and the degree of charcoal fragmentation. As a result, it is advised that the production of biochar be measured in relation to the initial biomass mass.
References:
- Kumar, P., Barrett, D. M., Delwiche, M. J., & Stroeve, P. (2013). Methods for pretreatment of lignocellulosic biomass for efficient hydrolysis and biofuel production. Industrial & Engineering Chemistry Research, 52(24), 8916-8929.
- Lee, H. J., Kim, D. J., Kim, H. S., & Park, H. J. (2016). Pyrolysis behaviors and kinetics of oak wood using thermogravimetric analysis. Bioresource Technology, 219, 138-144.
Qamar Ul Islam Thank you for your input. We are planning to run preliminary experiments to roughly estimate the size reduction of our particular feedstock. Hopefully, we will get some significant upper and lower values out of these experiments.