The manometric sorptomat—an innovative volumetric instrument for sorption measurements performed under isobaric conditions

Abstract

The present paper discusses the concept of measuring the process of sorption by means of the volumetric method, developed in such a way as to allow measurements performed under isobaric conditions. On the basis of the concept in question, a prototype of a sorption instrument was built: the manometric sorptomat. The paper provides a detailed description of the idea of the instrument, and of the way it works. In order to evaluate the usefulness of the device in sorption measurements carried out under laboratory conditions, comparative studies were conducted, during which the results of sorption measurements obtained with the developed instrument were compared with the results Mateusz obtained with a reference device. The objects of comparison were the sorption capacities of hard coal samples, calculated on the basis of the established courses of the methane sorption process. The results were regarded as compatible if the compared values fell within the range of the measurement uncertainty of the two devices. For the sake of the comparative studies, fifteen granular samples of hard coal—representing the 0.20–0.25 mm grain fraction and coming from various mines of the Upper Silesian Coal Basin—were used. After comparing the results obtained with the original manometric sorptomat with the results obtained with the gravimetric reference device, it was observed that the compatibility of measurements of sorption capacities was over 90%, based on the defined criterion of the measurement compatibility.

Investigating Permeability of Coal Samples of Various Porosities under Stress Conditions

“…At the Strata Mechanics Institute of the Polish Academy of Sciences, innovative measurement instruments for investigating the rock-gas system have been constructed [41][42][43][44][45][46][47][48][49]. The permeability of coal under stress conditions was investigated using a novel measurement stand, whose schematic representation is provided by Figure 3, and a photograph in Figure 4.…”

Fast evaluation of the coalbed methane content of coal viewed as an element leading to improvement in exploitation conditions

“…9. Bezpośrednie wyniku pomiaru -zaznaczony obszar "strat gazu" Unauthenticated Download Date | 5/12/18 3:50 AM ing coal seams treats the coalbed methane content MC as the basic parameter determining the content of methane in coal (Wierzbicki and Skoczylas 2014), the DMC value should be completed with the free gas FG and the sorption capacity SC understood as the content of gas under the pressure of 1 bar (Kudasik 2016). The content of free gas is determined by the porosity of coal and the value of the seam pressure.…”

Opening the Toolbox: 18 Experimental Techniques for Measurement of Mixed Gas Adsorption

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