Piero Stoppioni

Bio: Piero Stoppioni is an academic researcher from University of Florence. The author has contributed to research in topics: Triphos & Crystal structure. The author has an hindex of 27, co-authored 133 publications receiving 2291 citations.

Efficient CO2 capture by non-aqueous 2-amino-2-methyl-1-propanol (AMP) and low temperature solvent regeneration

Abstract: An experimental study describes the reversible fixation of CO2 by non-aqueous solutions of 2-amino-2-methyl-1-propanol (AMP). The captured CO2 is stored in solution as AMP carbamate and alcohol carbonates in different relative amounts as a function of the CO2–AMP ratio. The identification and the quantification of the species in solution were obtained from 13C NMR spectroscopic analysis. The bench-scale experiments of CO2 fixation and solvent regeneration have been carried out in a continuous cycle where the CO2-loaded and regenerated solutions are continuously circulated between the desorber and absorber. The carbonated solutions are decomposed in the desorber at 80–90 °C to regenerate the free amine for its reuse, affording CO2 absorption efficiency over 90%. The replacement of water with an organic solvent and the relatively low temperature of the desorption-regeneration step, could have the potential of reducing some disadvantages of aqueous absorbents, namely the amine loss by degradation and evaporation, equipment corrosion and energy cost of the regeneration step, yet preserving the high efficiency of aqueous amines.

Efficient Dehydrogenation of Formic Acid Using an Iron Catalyst

Abstract: Hydrogen is one of the essential reactants in the chemical industry, though its generation from renewable sources and storage in a safe and reversible manner remain challenging. Formic acid (HCO2H or FA) is a promising source and storage material in this respect. Here, we present a highly active iron catalyst system for the liberation of H2 from FA. Applying 0.005 mole percent of Fe(BF4)2·6H2O and tris[(2-diphenylphosphino)ethyl]phosphine [P(CH2CH2PPh2)3, PP3] to a solution of FA in environmentally benign propylene carbonate, with no further additives or base, affords turnover frequencies up to 9425 per hour and a turnover number of more than 92,000 at 80°C. We used in situ nuclear magnetic resonance spectroscopy, kinetic studies, and density functional theory calculations to explain possible reaction mechanisms.