  Achieving carbon neutrality is probably one of the most important challenges
of the 21st century for our societies. Part of the solution to this challenge
is to leverage renewable energies. However, these energy sources are often
located far away from places that need the energy, and their availability is
intermittent, which makes them challenging to work with. In this paper, we
build upon the concept of Remote Renewable Energy Hubs (RREHs), which are hubs
located at remote places with abundant renewable energy sources whose purpose
is to produce carbon-neutral synthetic fuels. More precisely, we model and
study the Energy Supply Chain (ESC) that would be required to provide a
constant source of carbon-neutral synthetic methane, also called e-NG (electric
Natural Gas) or e-methane (electric methane), in Belgium from an RREH located
in Morocco. To be carbon neutral, a synthetic fuel has to be produced from
existing carbon dioxide (CO2) that needs to be captured using either Direct Air
Capture (DAC) or Post Combustion Carbon Capture (PCCC). In this work, we detail
the impact of three different carbon sourcing configurations on the price of
the e-methane delivered in Belgium. Our results show that sourcing CO2 through
a combination of DAC and PCCC is more cost-effective, resulting in a cost of
146 e/MWh for e-methane delivered in Belgium, as opposed to relying solely on
DAC, which leads to a cost of 158 e/MWh. Moreover, these scenarios are compared
to a scenario where CO2 is captured in Morocco from a CO2 emitting asset that
allows to deliver e-methane for a cost of 136 e/MWh.
