maceral


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maceral

[¦mas·ə¦ral]
(geology)
The microscopic organic constituents found in coal.
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Oil shale, dark mudstone and coal samples were selected for organic maceral analysis in this study.
CHARACTERISTICS AND ACCUMULATION OF MIDDLE JURASSIC OIL SHALE IN THE YUQIA AREA, NORTHERN QAIDAM BASIN, NORTHWEST CHINA
Liptinite macerals rarely exceed 15% and vanish with increasing depth (Kcdzior and Jelonek, 2013).
Potentially toxic elements in soils and plants on a reclaimed coal-waste dump in Southern Poland (preliminary study)
Microscopic (petrographic) study of coal has long been used to study the kinds and amounts of macerals and minerals.
Liberation studies of Padhrar coal by using fractionation method, XRD analysis and megascopic and microscopic techniques
Los parametros de madurez termal fueron calibrados con respecto al Ro, que en el caso de los carbones presenta condiciones petrograficas optimas para llevar a cabo las mediciones del maceral vitrinita.
Estudio de la maduracion termal de kerogeno en los carbones de la Formacion Guaduas, Cordillera Oriental (Colombia), mediante analisis de reflectancia de vitrinita, pirolisis Rock Eval, resonancia magnetica nuclear y analisis proximal
Se encontro que existe una relacion directa entre las relaciones atomicas H/C y O/C con el contenido del maceral barquinita.
Efecto de la relacion atomica oxigeno/ carbono del carbon sobre la reactividad en la combustion de carbonizados
Coal petrographical techniques, such as the determination of vitrinite reflectance and maceral analysis, have been used successfully over the past years to identify the provenance of coal artifacts excavated by archaeologists.
Archaeology and petrology of coal artifacts from a Thule settlement on Axel Heiberg Island, Arctic Canada
The main maceral components are laminated algae, pollen and planktonic algae, with traces of liptodetrinite and humic organic material [12].
ORGANIC GEOCHEMICAL CHARACTERISTICS AND SOURCE ROCK POTENTIAL OF UPPER PLIOCENE SHALES IN THE AKCALAR LIGNITE BASIN, TURKEY
Earlier researchers have investigated the effects of maceral and microlithotypes on grindability of coal (Jorjani et al" 2008; Trimble and Hower, 2003; Hower, 1998; Hower and Calder, 1997; Gray and Patalsky, 1990; Hower and Wild, 1988).
An assessment of chemical properties and hardgrove grindability index of Punjab coal
The vitrinite maceral represents one of the most important maceral in coal, due to its high reactivity in coal transformation processes.
Efecto de la velocidad del aire, pH y concentracion de espumante sobre la recuperacion de vitrinita usando flotacion en columna
The used coal was characterized by maceral analysis, coking properties, proximate analysis and the elemental composition of the coal substance.
Co-coking of stamped charges with the waste organic admixtures
The formed char depends on maceral content, coal rank, particle size, char formation temperature, minerals presence [Cloke, 1994], microlitotypes and litotypes content [Bailey, 1990], heating rate during devolatilization, gas room [Chan, 1999] and residence time [Jones, 1999].
Liberacion de materia volatil y formacion de carbonizados de pared gruesa y delgada en funcion del contenido de vitrinita, rango del carbon, tiempo y temperatura de desvolatilizacion
A method of density separation was performed to obtain coal samples covering a wide range of maceral and mineral matter content.
The evaluation of chars reactivity using thermogravimetry and multivariate statistical method

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