TG-FTIR study of gaseous compounds evolved at thermooxidation of oil shale
The combined thermogravimetric (TG) Fourier transform infrared (FTIR) techniques were used for studying the gaseous compounds evolved at thermooxidation of oil shale samples from different deposits (Estonia, Jordan, Israel). In addition to H2O and CO2as the major species, the formation and emission of CO, SO2, HCl and a number of organic species as methane, ethane, ethylene, methanol, formic acid, formaldehyde, chlorobenzene, etc. was determined. Differences in the absorbance of respective bands in FTIR spectra depending on the origin of oil shale and on the heating rate used were established.
Totally 21 cracks in the weld on the outside wall were examined out in three multi-layer high pressure tanks periodical inspection,the weld was examined by MT and TOFD after repaired.The structure integrity evaluation and safety valuations of multi-layer high pressure tanks was carried on by AET,and it was concluded that the tanks would continue to be used.TOFD technique and AE technique can be combined in the complex pressure vessel,especially in extended service,periodical inspection to evaluate the structure integrity.