Productivity versus product quality: Exploring the limits of autothermal microchannel reactors in methane steam reforming

Operation range extensionviahot-spot control for catalytic CO2methanation reactors

“…is currently subject of intensive investigations due to its major role for the utilization of renewable energy for synthetic fuels and platform chemicals production. [56][57][58][59][60][61] Some studies also consider the following side-reactions to account for possible CO formation…”

Optimal Tube Bundle Arrangements in Side-Fired Methane Steam Reforming Furnaces

“…The three chemical reactions-reforming, total reforming and water gas shift-of Eq. 1 are modeled using the reaction kinetic model of Xu and Froment that is frequently used in the modeling of reforming and methanation reactions (Xu and Froment, 1989a;Xu and Froment, 1989b;Bremer et al, 2017;Liesche and Sundmacher, 2018b). The rate expressions are multiplied with an effectiveness factor of 0.1 (Wesenberg and Svendsen, 2007), typical for steam reformer operation.…”

“…Due to their industrial relevance, research on reforming processes is abundant, going from new catalysts to novel reactor concepts. Innovative reactor designs include autothermal reactor concepts where the heat of the reaction is provided by an exothermal reaction in an adjacent compartment such as catalytic combustion, the use of microchannels to mitigate transport barriers, and the utilization of solar energy to replace carbon feedstock as a heat source (Dybkjaer, 1995;Frauhammer et al, 1999;Tonkovich et al, 2004;Z'Graggen and Steinfeld, 2008;Liesche and Sundmacher, 2018b). Industrially relevant reactor types, however, include various types of tube bundle reactors and are distinguished using the placement of the burners as side-fired, top-or bottomfired (Reimert et al, 2000).…”

Radiation-based model reduction for the optimization of high temperature tube bundle reactors: Synthesis of hydrogen cyanide

“…Figure2: Discretization scheme in parabolic flow. A piecewise linear function is assumed in cross-flow direction y and piecewise constant states are assumed in z. ξ represents an arbitrary state 39. …”