End of life of Solid Recovered Fuels: could the gasification of waste compete with its incineration, answer by techno-economic and environmental analysis for the French case
Fin de vie des combustibles de récupération: est-ce que la gazéification de déchets peut être compétitive avec l'incinération, réponse par étude technico-économique pour le cas français
Résumé
Considering the future context of uncertainty on price and supply of gas and electricity from renewables, as well as the urgent need to reduce the global emissions of fossil greenhouse gases, finding safe and steady replacement sources of energy to fossil ones has become a paramount goal of modern society. Therefore, it might become environmentally and economically desirable to change the end of life in landfills of Solid Recovered Fuel (SRF) in order to extend its valorization to the production of more electricity or Synthetic Natural Gas (SNG). Different scenarios of SRF valorization involving a first step of gasification to allow more flexibility on the final utility production (heat, electricity, SNG) were modelled and compared to the base case of incineration. The study revealed a significant variation in overall energy yield and energy vectors from 80 % (amongst which 25 % goes to electricity and 55 % goes to heat generation) for the simplest incineration down to 57 % in the case the SRF is firstly gasified before burning the syngas for power (55 %) and heat (30 %) generation. The economic performance of all scenarios was assessed, it showed that depending on the retail price of gas and electricity, the most profitable scenario may vary. In the case of equivalent price for electricity and gas, the SNG production is the best, in the case electricity is higher than 80 €/MWhe for low gas remuneration (< 60 €/MWhLHV) the CHP system is the best option. Finally, in the unlikely eventuality that grid electricity is low price (< 60 €/MWh) and gas high (> 80 €/MWhLHV), the production of SNG via an electrified process involving electrolysis is the way to go as long as the electricity is low carbon.
Domaines
Génie chimiqueOrigine | Fichiers produits par l'(les) auteur(s) |
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