Structure de mise en forme 2 colonnes
Young Researchers

Methane conversion (Oxidative coupling and reforming)

Methane conversion via integrated exothermic oxidative coupling (OCM) and endothermic (dry) reforming (RM) is at the heart of the OCMOL process. Novel, innovative catalyst synthesis routes have been validated and catalysts have been optimized to exhibit desired activity and stability, see Figure 1. Fundamental kinetic modelling technologies, see Figure 2, provided an unprecedented understanding of the reaction mechanism and proved to be essential in reaching the performance targets. The integration of both reactions has been established both using ‘conventional fixed bed reactor system’, the so-called multi-bed micro-structured reactor (MMR) as well as the catalytic wall micro-structured reactor (CWMR) technology, see Figure 3. Autothermal operation could be achieved and maintained at a time scale of 24h.

Figure 1: (left) 1%Sr/10%La long-term stability test for OCM, (right) 2.8%Ru/LaPrMnCr/10%YSZ/10NiO long-term stability test for RM
Figure 2: Schematic representation of the 1D heterogeneous OCM model
Figure 3: Plate-heat-exchange microreactor for simultaneous OCM and RM

No new breakthrough catalyst formulations were discovered, confirming the well established intrinsic limitation in C2 yields for OCM. However, various formulas were found adequate for being coated on micro-structured reactors as planned in OCMOL, and, hence fulfilling the stability performance required for demonstrating the autothermal concept proposed as key objective.

 

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