maceral


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maceral

[¦mas·ə¦ral]
(geology)
The microscopic organic constituents found in coal.
References in periodicals archive ?
Maceral and biomarker data show that the OM pool is dominated by algal, planktonic and bacterial OM (Fig.
Currently, particular attention is paid to coal macerals and optical properties in relation to CRI and CSR indexes (Gupta et al., 2012; Pusz et al., 2009, 2003).
Table 1: The proximate, ultimate, and maceral composition of anthracite.
Despite the significant effects of the coal type on gas adsorption by coal, no agreement has been reached on how the maceral compositions are correlated to the adsorption capacity of coal for methane [34].
Several methods are available to determine the type and amount of mineral matter and to assess their associations with coal macerals. Fractionation method was used by several researchers (Cloke et al., 2002; Spears and Booth, 2002) to study associations of mineral components with organic material of coal in different size fractions.
En esta investigacion, %Ro proporciono datos contundentes sobre el grado de madurez termal de las muestras analizadas (mantos de carbon), debido a que la vitrinita (maceral) va aumentando su reflectividad, a causa de reacciones de aromatizacion irreversibles y complejas, en la medida que aumenta la madurez termal de la roca.
La naturaleza del carbon, tal como el rango y la composicion maceral.
Trace element data as well as maceral data were used to reconstruct depositional environment of the Miocene marine source rocks in the Qiongdongnan Basin.
The process of self-heating of coal is influenced by many factors, including deposit temperature, the degree of coal fragmentation, type of coal and its rank, and moisture and ash content of coal, as well as maceral composition.
La reactividad del carbonizado en el proceso de combustion esta influenciada por la velocidad de calentamiento, tiempo de residencia durante la desvolatilizacion, temperatura de combustion, ambiente gaseoso (nivel de oxigeno), morfologia del carbonizado, contenido de carbono, composicion maceral y mineral, rango del carbon, presion, area superficial activa, textura optica, porosidad del carbonizado, contenido de hidrogeno en el carbonizado y contenido de carbono y oxigeno (relacion atomica O/C) del carbon que produce el carbonizado (Gale et al., 1996; Cai et al., 1998; Arenillas et al., 1999 y 2001).
Vitrinite reflectance (R0) value is microscopically determined on the wood-derived maceral vitrinite.