Relation between texture and reactivity in metallurgical cokes obtained from coal using petroleum coke as additive

Characterization of the porous structure of cokes produced from the blends of three Polish bituminous coking coals

“…Similar linear dependence between reactivity to CO 2 and the micropore specific surface area was found by Cimadevilla et al (2005) for cokes from two coals oxidized at various times and next carbonized at a laboratory scale. Scattering of the experimental data presented by Pis et al (2002) and Cimadevilla et al (2005) was distinctly lower in comparison with the data of this work. Probably, it is a consequence of more differentiated composition of blends studied in this work and consideration of surface area of larger pores than micropores.…”

“…Physical and chemical structures of external layers of pore solid walls are also important. Pis et al (2002) studied series of cokes from binary blends of two bituminous coals with addition of two green petroleum cokes of various concentrations (4, 10, 20%). Reactivities of 12 resultant cokes increased linearly with micropore volume.…”

“…The correlation between area of internal surface of char or coke and their reactivity towards gasifying agents (e.g., CO, CO 2 or O 2 ) were widely published (Mühlen and van Heek, 1995;Alvarez et al, 1998;van Heek, 2000;de la Puente et al, 2000;Pis et al, 2002;Arenillas et al, 2003;Cimadevilla et al, 2005;Duffy et al, 2007). Alvarez et al (1998) and Cimadevilla et al (2005) studied cokes produced at semi-industrial scale and at a laboratory scale, respectively.…”

Reprint of “The original concept of description of the coke optical texture”

“…The higher value of bireflectance, the higher degree of anisotropy (Duber and Rouzaud, 1999;Duber et al, 2000). The influence of the coal properties and technology conditions on the microtexture have been already studied (Patrick et al, 1973;Piechaczek et al, 2010;Pis et al, 2002;Pusz et al, 2003Pusz et al, , 2009Pusz et al, , 2010Singh et al, 2007;Smędowski et al, 2011).…”

Evaluation of the possibilities of applying fractal analysis for the characterization of molecular arrangement of carbon deposits in comparison to conventional instrumental methods

“…It is well known from the literature (Mahamud et al, 2003;Mahamud and Novo, 2008;Marsh, 1989;Patrick et al, 1983;Pis et al, 2002;Pusz and Buszko, 2012;Pusz et al, 2009;Singh et al, 2007) that the reactivity of different carbon materials depends on their degree of structural order. To confirm the validity of this thesis for the studied carbon deposits, all the calculated parameters were compared with the reactivity coefficient, K, determined according to the Genovese standard.…”