The production of carbon-neutral fuels is an important challenge to reducing greenhouse gas emissions from the energy sector. In this regard, separating carbon dioxide from power-plant flue gas and raw biogas to upgrade it to biomethane economically is a pressing challenge. Recent developments in the synthesis of novel sorbents for practical carbon capture applications, tailoring of adsorptive properties of novel porous materials, and evolution of properties required for CO2 separation from power-plant flue gas and raw biogas will be described, including CO2 uptake capacity, high CO2 over CH4 and CO2 over N2 selectivity, rapid uptake and release kinetics and long-term durability will be discussed. Furthermore, the synthesis and structuring of novel porous materials for ammonia storage as hydrogen carriers will be presented. The research aims to establish safe storage of seasonal energy in the form of green ammonia using structured porous sorbents and alkaline earth metal halides (AEMHs) with superior sorption kinetics and structural stability.