Environmental and economic potential of decentralised electrocatalytic ammonia synthesis powered by solar energy

Abstract

Intense efforts have been devoted to developing green and blue centralised Haber-Bosch processes (gHB and bHB, respectively), but the feasibility of a decentralised and sustainable scheme has yet to be...

Iron oxide-promoted photochemical oxygen reduction to hydrogen peroxide (H2O2)

“…ammonia or formic acid). 19–29 Pure H 2 stored in a tank at 35 MPa (room temperature) delivers 2.8 MJ L −1 when operated in a fuel cell, which is very similar to the energy density of aqueous H 2 O 2 (70 wt%) with 3.1 MJ L −1 . 30,31 Thus H 2 O 2 , being fully soluble in water, offers an easy-to-handle liquid fuel alternative achieving safer operation, storage and transportation.…”

Absolute Sustainability Assessment of Flue Gas Valorization to Ammonia and Synthetic Natural Gas

“…Notably, our study considers prepandemic cost values for the BAU, thus failing to capture how fossil fuel prices might increase due to disruptions in the natural gas supply chain, as in Europe in 2022. Indeed, recent studies pointed out how, in such cases, renewable-based chemicals might become economically competitive. , Furthermore, future projections for similar power-to-SNG routes proved that such technologies might become cost-competitive with the BAU, considering a substantial decline in the cost of electricity and of the electrolyzer, improvements in the electrolyzer efficiency, and the valorization of byproducts such as oxygen. − …”

“…Indeed, recent studies pointed out how, in such cases, renewable-based chemicals might become economically competitive. 53 , 54 Furthermore, future projections for similar power-to-SNG routes proved that such technologies might become cost-competitive with the BAU, considering a substantial decline in the cost of electricity and of the electrolyzer, improvements in the electrolyzer efficiency, and the valorization of byproducts such as oxygen. 13 − 15 …”

Integrating climate policies in the sustainability analysis of green chemicals

“…The standardised life cycle assessment (LCA) methodology 21,22 has been extensively applied to assess and compare the environmental performance of fossil and green production routes for hydrogen, 23,24 ammonia, 25,26 and methanol. 27–29 These analyses have consistently highlighted the potential environmental superiority of the green routes over their fossil counterparts.…”