The condensation process of supercritical water gasification products in a bicubic supersonic nozzle

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(2)

Published: Feb. 1, 2025

The development of energy-efficient and clean supercritical water gasification product (SCWGP) separation technology has become one the bottlenecks in advancing technology. This study suggests utilizing a supersonic nozzle to condense separate H2 CO2 from SCWGP. flow condensation model are established for bicubic parametric nozzle, effects various operating conditions on SCWGP analyzed. liquid phase mass fraction at outlet is significantly influenced by inlet pressure temperature. approximate relationship between variations 0.065 per MPa, while temperature approximately –0.013 K. latent heat released during process significant impact distribution within nozzle. Inlet parameters have notable effect peak values positions nucleation droplet growth rates. condensed primarily concentrated near center outlet. efficiency strongly molar gas mixture, small amount N2 mixed little performance.

Language: Английский

Efficient enhancement of CO2 separation and capture of the T-C3N2 membranes with modulations of strain, charge, and their synergistic effect

Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(2)

Published: Feb. 1, 2025

The effective separation and capture of CO2 over C2H2 CH4 via T-C3N2 monolayer membranes modulated by strain, charge, their synergistic effect was realized using molecular dynamics simulations density functional theory calculations. strained exhibits high permeability 2.15 × 107 2.32 GPU at 300 K in the CO2/C2H2 CO2/CH4 separation. introduction negative charges is a promising approach for improving performance due to breaking trade-off effects, that is, not only enhanced (2.94–3.07) ×107 but also selectivity relative improved 4.40 1033 2.82 1022, higher 1016 orders magnitude compared pure T-C3N2. effects strain effectively enhance performance, effectiveness surpasses modulation slightly weaker than individual charge modulation. adsorption strength on surface can be significantly increased charges. Moreover, capture/release on/from could modulating process injection/removal uptake capacity reaches 5.26 1014 cm−2, which superior other membrane materials. demonstrated enhancement modulations suggests broad prospects applications efficient from low-carbon hydrocarbon gases carbon capture.

Language: Английский

Impact of Microgrooves on Supersonic CO2 Condensation and Pressure Recovery in a Converging-Diverging Nozzle

Case Studies in Thermal Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 106376 - 106376

Published: May 1, 2025

Language: Английский