METHOD FOR ASSESSING STATIC ADSORPTION OF CATALYTIC ELEMENTS FROM CATALYTIC COMPOSITIONS ON RESERVOIR ROCKS Russian patent published in 2024 - IPC G01N5/02 G01N30/72 

FIELD: geological survey.

SUBSTANCE: method for assessing the static adsorption of catalytic elements from compositions on reservoir rocks, which consists in the fact that a previously extracted sample of the reservoir rock is crushed and using sieves of 75-300 μm fraction is separated from the dispersed phase, the retained fraction is weighed and placed in a sealed container, a catalytic composition of a known volume is added to the container so that the volume of the composition overlaps the volume of the crushed rock, then mixed, the container is tightly closed and stored for 48 hours, while in order to maintain optimal contact between the composition and the rock, the container is shaken at intervals of 4 hours, after this, using a centrifuge, the catalyst solution is separated from the rock, and in the isolated supernatant, the concentration of the catalyst element is determined by inductively coupled plasma mass spectrometry ICP-MS, after which static adsorption is calculated using the formula q_e = (C₀-C_e)V/W, where C₀ is the initial concentration of the test solution, mg/l, C_e is the equilibrium concentration of the test solution, mg/l, V is the volume of the solution, l, W is the weight of the adsorbent, g.

EFFECT: possibility of an evaluation method of static adsorption of the catalyst element during the interaction of the catalytic composition with the reservoir rock, determination of the optimal size of the rock fraction, which is 75-300 microns, the ratio of the volumes of the reservoir rock and the catalytic composition for interaction in the tank, in which the reservoir rock must be covered on top with the catalytic composition, determination of the optimal reaction time for complete adsorption to occur, which is 48 hours, improvement of measurement accuracy and expansion of the range of measured elements through the use of inductively coupled plasma mass spectrometry (ICP-MS) to determine element concentrations.

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