maceral


Also found in: Encyclopedia, Wikipedia.

maceral

(ˈmæsərəl)
n
(Geological Science) geology any of the organic units that constitute coal: equivalent to any of the mineral constituents of a rock
[C20: from Latin mācerāre to macerate]
References in periodicals archive ?
Nine oil shale and mudstone samples from [K.sub.2][qn.sup.1] in the southeastern Songlio Basin were selected for maceral analysis.
ISO 7404-3: Methods for the petrographic analysis of coals - Part 3: Method of determining maceral group composition.
In addition, maximum vitrinite reflectance measurements and proximate, ultimate, and maceral composition and coal ash composition analyses were performed following the GB/T 6948-2008, GB/T 2122008, GB/T 476-2001, GB/T 8899-1998 and GB/T 1574-2007 standard procedures, respectively.
Tests Parameters/values Proximate [M.sub.ad] [V.sub.daf] analysis (%) 3.94 16.52 Maceral V I composition 78.26 16.17 (vol%) Elemental [C.sub.daf] [H.sub.daf] analysis (%) 68.80 5.09 Basic Density (g/[cm.sup.3]) Elastic module (GPa) parameters 1.48 2.35 Tests Parameters/values Proximate [A.sub.ad] [F.sub.Cad] analysis (%) 12.24 67.30 Maceral E M composition 4.46 1.11 (vol%) Elemental [N.sub.daf] [O.sub.daf] analysis (%) 1.00 25.11 Basic Compressive strength (MPa) Poisson's ratio parameters 18 0.28 Note.
The enrichment of coal provides an opportunity for the separation of coals and their maceral composition due to the difference of densities [27].
Over recent decades, extensive theoretical and experimental research has been performed on gas adsorption by coal, most of which focused on the effects of physical and chemical properties of coal (such as maceral and mineral composition [6], pore structure [7], and functional group content [8]) and experimental conditions (such as temperature [9], pressure [10], adsorbates [11], and moisture [12]).
Matsuoka et al., "The influence of rank and maceral composition on ignition and char burnout of pulverized coal," Fuel Processing Technology, vol.
The R tests were carried out using hole-rock maceral analysis (SY/T 6414-1999, Chinese petroleum and natural gas industry standard), and at least 800 points were tested.
Most of the difficulties associated with coal utilization arise from inorganic mineral matter rather than maceral composition.