METHOD OF MOTOR FUELS PHYSICAL STABILITY DETERMINING DURING THEIR STORAGE IN STATIONARY RESERVOIRS (TANKS) Russian patent published in 2017 - IPC G01N33/22 

FIELD: testing method.

SUBSTANCE: invention relates to motor fuels performance characteristics assessing laboratory methods and can be used for prediction of motor fuels tendency to change in quantitative losses caused by attrition in consuming and producing motor fuel enterprises. Method involves tank filling with fuel to preset level, storage of fuel in specified conditions for certain time interval and evaluation of physical stability by weight of evaporated fuel, wherein tested fuel is placed into thermostatically controlled tank, setting factors of evaporation process conditions, from 15 stages forming testing cycle as required and minimum sufficient set of test modes in form of matrix, after each stage, duration of which is 240±5 minutes, recording weight of evaporated fuel, upon completion of testing cycle determining generalized index m_evap of tested fuel tendency to losses due to evaporation, and if m_evap is less than m_ref value obtained for fuel, taken as reference one, considering tested fuel to be physically stable, and that it can be recommended for long-term storage in reservoirs (tanks), wherein composite index m_evap(ref) of fuel tendency to losses due to evaporation is calculated by preset formula.

EFFECT: enabling higher reliability of results due to approximation of test conditions to storage actual conditions in tanks with simultaneous reduction in tests conducting duration.

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