The occurrence characteristics of sodium and its potential relationship with macerals in Zhundong coal, as well Shenfu coal average levels, are investigated this study. A new five-step sequential extraction method was first conducted for determination. status related samples determined by microscope SEM–EDS (scanning electron microscope–energy dispersive X-ray spectroscopy). Soluble salts (H2O-...

The aim of the research presented in this article was to analyse processes source-rock decomposition, including kinetic parameters pyrolysis, relation type organic matter and its maturity. examined source rocks were Menilite shales from several units within Flysch Carpathians (Poland). samples analysed with use thermal methods, Rock-Eval thermogravimetry coupled an FTIR detector. Kinetic determ...

Late Permian coal deposits are widely distributed throughout southwestern China. This paper describes the petrological composition of last seam in Longmendong section Emeishan area during latest Changhsingian (Permian) and records important information regarding evolution mass extinction event that occurred at end Permian. The results show dominant maceral group is vitrinite, followed by liptin...

A series of qualitative descriptions and quantitative analyses was used to determine the lithofacies characteristics recognize favorable shale intervals Dawuba Formation in Ziyun area South Qian Depression. The include core description scanning electron microscope (SEM) observation. X-ray diffraction, total organic content analysis, vitrinite reflectance, maceral composition, porosity, permeabi...

Raman spectroscopy and vitrinite reflectance measurements of dispersed organic matter from Carboniferous shales in boreholes the northern part Intra-Sudetic Basin were used for thermal history reconstruction. Microscopic investigations have shown that is dominated by maceral group. In analysed samples, shows a varied degree alteration determined mean random (VRo) ranging 0.72% to 3.80%. Mean ap...

Haerwusu Surface Mine of the Jungar Coalfield is a large coal mine. Its formation environments have not been reported in detail. In order to reconstruct paleoenvironment peat formation, nine samples were collected, and analyzed using microscope, column chromatography, gas chromatography (GC), chromatography–mass spectrometry (GC–MS). According results microscopic analysis, average random vitrin...

The adsorption/desorption characteristics of a coal reservoir play an important role in coalbed methane (CBM) development. proximate analysis, maceral analysis and isothermal experiment are carried out based on samples from no. 4+5 seam Baode block. Combing with experimental data the CBM well-produced water salinity block, effect content its influencing mechanism is discussed. results show that...

The estimation of the degree carbonification coals can be investigated using Raman microspectroscopy applied for analysis grains selected macerals (altered remains organic particles). This approach allows best control analyses such as precise selection and orientation maceral to analysed. On other hand, miniaturized, especially handheld spectrometers typically offer a significantly less control...

Fifty-four coal clast samples in the siliciclastic rocks (e.g., sandstone and conglomerate) were collected from cores of two-deep research wells (K20H K20K) drilled at Kozlu coalfield Zonguldak Basin, for first time, they evaluated using mineralogy by XRD SEM-EDX random vitrinite reflectance (%Rr) measurements order to find out their origin timing. Petrographic observations on polish surfaces s...