RT info:eu-repo/semantics/article
T1 Nitric oxide recovery from hydrogen combustion streams. A clean pathway for the sustainable production of nitrogen compounds
A1 Castro Ferro, Nataly
A1 Vaquerizo Martín, Luis
K1 Sustainability
K1 Gas absorption
K1 Nitric acid production
K1 Thermodynamic modeling
K1 Hydrogen combustion
K1 3322.05 Fuentes no Convencionales de Energía
AB This work proves that nitric oxide (NO) can be successfully recovered from hydrogen flue gas streams in nitric acid, opening new pathways for NO control in combustion streams. Recovering NO from hydrogen combustion streams allows for increasing the combustion temperature in the turbine, reducing the fuel consumption per kWh, while obtaining a building block for nitric acid production. The solubility of nitric oxide is determined in amines, ethanol, and nitric acid solutions at a laboratory scale, suitable candidates for nitric oxide absorption. The solubility of nitric oxide in amines and ethanol is very low (0.009 mol/L/bar & 0.018 mol/L/bar respectively) compared with nitric acid (0.23 mol/L/bar), which is in the same range as the solubility of CO2 in amines solutions. Nitric acid, in addition to having good NO solubility, also presents high selectivity towards nitric oxide and easy recovery of nitric oxide by simply raising the temperature. Finally, a fugacity-activity coefficient model combining the Peng-Robinson (PR) equation of state with the Non-Random Two-Liquid (NRTL) activity coefficient model is proposed as a thermodynamic model to represent the NO-HNO3-H2O equilibrium, giving as a result an average absolute deviation between the experimental results and the model predictions of only 5%.
PB Elsevier
SN 0301-4797
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/73609
UL https://uvadoc.uva.es/handle/10324/73609
LA eng
NO Journal of Environmental Management, noviembre 2024, vol. 370, 122561
NO Producción Científica
DS UVaDOC
RD 03-mar-2025