Effect of Li+ stabilization on smectite intercalate properties

Krzyżanowski, Andrzej; Zarębska, Katarzyna; Baran, Paweł

doi:10.1134/s1061933x16030066

Cited by 2 publications

(1 citation statement)

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“…The sorption of unsaturated hydrocarbons: propylene, ethylene and acetylene has been previously discussed in the literature. Multiple bonds between the two atoms of carbon make gaseous substance more chemically active and undergo reactions with polar fragments of the coal structure [19,20]. A double bond (C=C) in propylene and ethylene has one strong sigma and one weak π bonds; a triple bond (C≡C) in acetylene has one sigma bond with two remaining being π bonds.…”

Section: Resultsmentioning

confidence: 99%

Sorption characteristic of coal as regards of gas mixtures emitted in the process of the self-heating of coal

Wojtacha‐Rychter

Smoliński

2017

E3S Web Conf.

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Abstract. One of the most challenging tasks in the coal mining sector is the detection of endogenous fire risks. Under field conditions, the distance between the points where samples for the analyses are collected and the actual place where coal self-heating takes place may be quite remote. Coal is a natural sorbent with a diverse character of pore structures which are surrounded by fractures and cleavage planes constituting ideal spaces for the flow and adsorption of gases. The gases (methane, ethane, ethylene, propane, propylene, acetylene, carbon dioxide, carbon monoxide, hydrogen) released from the source of fire migrate through the seam and may be subject to adsorption, or they may cause the desorption of gases accumulated in coal. Therefore, the values of reference sample concentrations may be overstated or understated, respectively. The objective of this experimental study was to investigate the adsorption phenomena accompanying the flow of a multi-component gas mixture through a coal bed which may occur in situ. The research was conducted by means of a method based on a series of calorimetric/chromatographic measurements taken to determine the amount of gases released during coal heating at various temperatures under laboratory conditions. Based on the results obtained in the course of the experiments, it was concluded that the amount of gas adsorbed in the seam depends on the type of coal and the gas. Within the multi-component gas mixture, hydrocarbons demonstrated the largest sorption capacity, especially as concerns propylene.

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Section: Resultsmentioning

confidence: 99%