Green hydrogen recovery from natural gas grids by adsorption process
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In this work, the binder-free zeolite 13X was tested to purify green
hydrogen injected into natural gas grids. Green hydrogen can be a key
factor in meeting global energy demand while contributing to climate
goals. In this way, breakthrough curve experiments were performed to
assess the equilibrium and kinetic adsorption for H2 and CH4 in binder-
free zeolite 13X. This work covers the lack of adsorption data and
multicomponent breakthrough curves of H2/CH4 at low temperatures
(until 195 K) which were not available in the literature. The
equilibrium data were modeled by using the dual-site Langmuir
isotherm model and the multicomponent breakthrough curves were
simulated using a mathematical model implemented in MATLAB.
Performance parameters based on equilibrium data were discussed.
Overall, binder-free zeolite 13X has great potential to separate H2 from
CH4 based on equilibrium (higher capacity for CH4 with fast diffusion
of both gases).
