The data files are named in accordance with the sections in which they are relevant in the publication: Hu W., Donat F., Scott S. A. and Dennis J. S. 2015. Kinetics of oxygen uncoupling of a copper based oxygen carrier. Applied Energy doi:10.1016/j.apenergy.2015.10.006. Data files from thermogravimetric analyser (TGA/DSC1, Mettler Toledo) are space separated txt files containing the following main entries: (each field separated by "/") Index/time stamp/sample temperature/reference temperature/sample mass. Data files for fluidised bed measurement are comma separated txt files in the format "time stamp, voltage". The detailed processing of the data is described in the file named "Note on data processing.txt".