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Estimation of Gas Composition and Cage Occupancies in CH4-C2H6 Hydrates by CP-MAS 13C NMR Technique
Gas hydrate Natural gas Gas composition Cage occupancy 13C NMR
2009/7/28
CP-MAS 13C NMR measurements were carried out on mixed gas hydrates containing CH4-C2H6. The changes in NMR chemical shift values for CH4 and C2H6 clearly corresponded to the structural changes in the...
Non-destructive Evaluation Method for Far-side Corrosion Type Flaws in Oil Storage Tank Bottom Floors Using the Magnetic Flux Leakage Technique
Non-destructive testing Magnetic leakage field Oil storage tank
2009/7/24
A quantitative procedure based on the magnetic flux leakage technique was proposed to evaluate the size of metal-loss type flaws such as corrosion pits in oil storage tank bottom floors. The approach...
Oxidation Stability of Lubricants Measured by a PDSC Technique
base oil engine oil oxidation stability pressure DSC
2010/8/11
A methodology was developed for evaluation of oxidation stability of base stocks and engine oils. Analytical procedures for both classes of lubricants were based on the ASTM standards D 6186 and/or E ...