Contribution of mineral matter to water associated with bituminous coals
Contribution of mineral matter to water associated with bituminous coals
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DOI：
10.1021/ef980151b
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发表时间：
1999
期刊：
影响因子：
5.3
通讯作者：
A. Mccutcheon;W. A. Barton
中科院分区：
文献类型：
--
作者：
A. Mccutcheon;W. A. Barton
采用重量吸附和核磁共振（NMR）技术研究了矿物质对两个澳大利亚烟煤煤层样品的水分结合能力的影响。从矿物质（主要是粘土）和煤样的有机组分的水吸收的贡献，确定从精确的等温吸附测量在相对压力高达0.9，使用Hiden智能重量分析仪。此外，水与煤样品相互作用，使其在加热过程中在−3 °C下解冻，使用质子NMR技术进行定量。在相对压力为0.9时，煤样中矿物质的吸水量（每单位质量的干固体）被评估为有机物质吸水量的2.3 - 2.8倍。煤矿物物质含有26重量%的蒙脱石，膨胀型粘土，有超过两倍的水吸收每单位表面积相比，矿物物质中的粘土只存在高岭石。For...
The effect of mineral matter on the moisture-binding capacity of samples from two Australian bituminous coal seams was investigated by gravimetric sorption and nuclear magnetic resonance (NMR) techniques. The water uptake contributions from the mineral matter (predominantly clay) and organic components of the coal samples were determined from precise isothermal sorption measurements at relative pressures up to 0.9 using a Hiden intelligent gravimetric analyzer. Also, water interacting with the coal samples, such that it is unfrozen at −3 °C during heating, was quantified using a proton NMR technique. Water uptake (per unit mass of dry solids) at a relative pressure of 0.9 by the mineral matter in the coal samples studied was assessed to be 2.3−2.8 times the uptake by the organic material. Coal mineral matter containing 26 wt % of montmorillinite, a swelling type clay, had more than twice the water uptake per unit surface area when compared to mineral matter in which clay was present only as kaolinite. For...