Evaluating transition-metal catalysis in gas generation from the Permian Kupferschiefer by hydrous pyrolysis

Hydrocarbon generation from coal, extracted coal and bitumen rich coal in confined pyrolysis experiments

“…According to this mechanism, lower activation energies for the cracking of wet gases in the three experiments in this study compared to oil cracking experiments in previous studies may be ascribed to catalysis of transition metals in the coal. However, transition metal catalytic processes have been questioned (e.g., McNeil and BeMent, 1996;Snowdon, 2001;Lewan et al, 2008). In particular, the result of hydrous pyrolysis experiments on source rocks rich in transition metals demonstrates that transition metals have no effect on methane yields (Lewan et al, 2008).…”

Zechstein-Kupferschiefer Mineralization Reconsidered as a Product of Ultra-Deep Hydrothermal, Mud-Brine Volcanism

“…The clay is also enriched in pyrite, Ba, and Sr in more distal settings. The clay of the Kupferschiefer also has strong enrichments in Re, Pb, Zn, Cu, Au, and PGE elements ( Figure 7 in [17]). The carbonaceous shales contain an unusual element suite that represents an end member composition for similar, worldwide, metal-bearing, carbonaceous shales ( Figure 7 in [17]).…”

Evaluating Re–Os systematics in organic-rich sedimentary rocks in response to petroleum generation using hydrous pyrolysis experiments

“…Superimposed on these diagrams is the Eh-pH field for marine and marginal marine sediments (ms; Baas Becking et al, 1960). This field is divided into oxidizing and reducing sediments at an Eh of zero (Lewan, 1984;Lewan et al, 2008). Within the reducing portion of the sediment field, Re and Os occur predominantly in the form of a sulphide.…”