Abstract: The fire investigation of a ship container cargo deflagration caused by spent hydrotreating catalysis was analyzed. By video analysis, personnel description, trace of the scene, the container where the deflagration firstly happened was confirmed. By XRD, XRF, the cargo was identified as spent hydrotreating catalyst. By analysis method such as gas chromatography mass spectrometry and microcalorimetry, the reason of the deflagration was determined.

Key words: spent hydrotreating catalyst, video analysis, trace of the scene, fire investigation