Methane capacities of Zonguldak coals and the factors affecting methane adsorption

Mining Science and Technology Pub Date : 1991-09-01 DOI:10.1016/0167-9031(91)91346-J

Ercüment Yalçin , Şevket Durucan

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引用次数: 31

Abstract

This study aimed to establish methane adsorption isotherms for coal samples taken from four different seams in Kozlu district, Zonguldak Coalfield, Turkey. The quantity of methane adsorbed by these samples, at different gas pressures up to 45 atm, was determined and the results were discussed in relation to the gas capacities of these coals. The methane adsorption capacities of Zonguldak coals were compared with the gas capacities of some British and American coals. Methane adsorption isotherms were measured at constant temperature of 25°C.

The effects of the moisture content of a coal sample on the methane adsorption capacity of coal was determined for Çay coal and it was seen that a moisture content of 1.79% reduces by about 13% the quantity of methane adsorbed by coal. It was also found that for particles smaller than 65 mesh size, the quantity of methane adsorbed by coal does not change. By using the empirical equation suggested by Ettinger, adsorption isotherms for temperatures other than 25° were also drawn.

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宗古达煤的甲烷容及其吸附影响因素

本研究旨在建立土耳其宗古尔达克煤田Kozlu地区四个不同煤层煤样的甲烷吸附等温线。测定了这些样品在高达45大气压的不同气体压力下吸附的甲烷量，并讨论了结果与这些煤的气体容量的关系。将宗古达煤的甲烷吸附能力与英美煤的气吸附能力进行了比较。在恒温25℃条件下测定甲烷吸附等温线。以Çay煤为例，测定了煤样含水率对煤吸附甲烷能力的影响，发现含水率为1.79%时，煤对甲烷的吸附量减少约13%。还发现，对于小于65目的颗粒，煤吸附的甲烷量没有变化。利用Ettinger提出的经验方程，还绘制了温度大于25°时的吸附等温线。

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Mining Science and Technology

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