Strategies for a More Resilient Green Haber-Bosch Process

Abstract 

This work focuses on the dynamic analysis of a single-bed fixed-bed catalytic reactor (FBCR) used for ammonia synthesis. The single-bed model was configured in gPROMS® Process using Siemens’ FBCR library, and subjected to a series of dynamic tests to gain insight into its operation under transient conditions. This study, still in its early stages, aims, in the long term, to explore flexibility strategies for the Haber-Bosch (HB) process, enabling it to accommodate variable hydrogen loads while maintaining safe operation. Taking a nominal operating point as a reference, a series of time ramps were enforced on the most relevant process variables, including the inlet reactor temperature, reactor operating pressure, feed composition and flow rate, and their effects on reactor perfor mance have been observed. The results of this preliminary study will serve as the foundation for testing the flexi bility measures currently proposed in the literature to ensure the safe operation of the green HB (gHB) process. 

Keywords: gProms, Green Ammonia Production, Haber-Bosch Process, Flexibility

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