Siderite decomposition in retorting atmospheres

Signatures in magnetites formed by (Ca,Mg,Fe)CO3 thermal decomposition: Terrestrial and extraterrestrial implications

“…The higher the Ca and Mg content (FD15 vs. FD20) the higher the decomposition temperature; conversely, the higher the Fe content (FD15 vs. FD20 and FD16 vs. FD21) the lower the decomposition temperature (Table 1). This is consistent with differences in decomposition temperature for the pure end-member minerals (Hurst et al, 1993;Brearley, 2003).…”

“…In contrast, other researchers have not observed the incorporation of Ca in magnetite during the thermal decomposition of mixed-cation siderite Ware and French, 1984;Dubrawski, 1991;Hurst et al, 1993;Isambert and Valet, 2003;Cohn, 2006;Isambert et al, 2006;Bell, 2007;Thomas-Keprta et al, 2009). Thomas-Keprta et al (2009) suggest that the decomposition of an ankerite-dolomite solid solution would follow a sequential pathway in which the solid solution precursor separates first into calcite and a siderite-magnesite phase prior to the nucleation and growth of the magnetite.…”

Heating rate effect on fractional yield and composition of oil retorted from El-lajjun oil shale

“…Temperature of reaction, sweeping fluid of the generated hydrocarbons from reaction environment, rate of heat input to the oil shale, size of particle, mineral content are among the most important factors that dictate thermal reactions behavior of oil shale during pyrolysis [16][17][18][19][20][21]. The most important of these is the heating rate, i.e.…”

Oil Shale Pyrolysis in Fixed-Bed Retort With Different Heating Rates

“…Heterogenity of oil shale in composition and origin makes it an interesting material to study [1]. Reaction temperature, fluid of generated hydrocarbons leaving the reaction zone [2][3][4], rate of heat input [5][6][7][8], particle size [9], mineral content [10] are among the most important factors that dictate the behavior of oil shale decomposition during pyrolysis. The most important of them is the heating rate that exerts a significant influence on the reactions and products of the pyrolysis process.…”