**1. Introduction**

The mitigation of climate change requires the rapid decarbonization of all sectors [1]. In recent decades, great progress has been made in the electricity sector by increasing the share of renewable energies [2]. The decarbonization process, however, is not exclusively limited to the electrical energy sector. The focus is therefore now shifting to other sectors, for example, industry and transport, in order to reach the Paris goals on climate change. In the past, different energy sectors mainly operated separately or independently. However, with the increasing use of inter-sectoral flexibility options, different energy sectors are set to be coupled more closely and should therefore be analyzed as a whole [3,4]. An integrated assessment of the electricity and gas sectors is therefore particularly important. In this paper, we establish a simulation tool framework that is capable of solving hydrogenenriched natural gas flow simulation problems.
