In-situ characterisation of microstructural evolution in spruce wood during soda pulping

SNIC 2019/4-91


SNIC Small Compute

Principal Investigator:

Ahmed Wagih


Chalmers tekniska högskola

Start Date:


End Date:


Primary Classification:

20401: Chemical Process Engineering




With the aim of having a global view of the microstructural evolution of wood during soda pulping and to optimize the sample, a step-pulping process has been performed as a preliminary step for in-situ inspection. During this experiment, the pulping process was interrupted each 30 min and the wood chip is taken to be inspected using lab x-ray tomography. Two main challenges appear during this experiment: the phase contrast is reduced due to the saturation of samples with water and the the interruption of the experiment every 30 min having the samples exposed to external conditions, which highly affects the microstructure. To overcome these challenges, we designed a small scale reaction cell to in-situ inspect the structural changes in wood while the soda-pulping experiment using synchrotron x-ray tomography. The synchrotron X-ray experiment has been performed at Paul Scherrer Institute in Switzerland using TOMCAT beam line. The inspection results abroximatly requires 10 000 GiB to be stored which is not an easy task to be stored in personal computers. The analysis of these data requires super computer to be post-processed using Image J software since all the data are image processing.