Numerical simulation of condensation of supercritical water gasification products in a supersonic nozzle
Journal article, 2024

The clean and efficient separation of supercritical water gasification products (SCWGP) has emerged as a significant challenge in supercritical water gasification technology. This paper proposes the use of a supersonic nozzle for the condensation and separation of H2 and CO2 from SCWGP, leveraging the high-pressure characteristics of these products. By establishing a flow model and a condensation model for the supersonic nozzle, the effects of inlet pressure and inlet temperature on the condensation process are analyzed. The analysis reveals that the latent heat released during condensation causes an abnormal distribution of pressure and temperature within the nozzle. When the inlet pressure of the nozzle is increased from 7.0 to 9.0 MPa, the liquid phase mass fraction at the outlet rises from 5.3 × 10−3 to 0.056. Similarly, when the inlet temperature is lowered from 300.0 to 290.0 K, the liquid phase mass fraction at the outlet also rises from 5.3 × 10−3 to 0.058. The increase in inlet pressure leads to the condensation location shifting toward the throat by ∼8.5 × 10−3 m MPa−1, while the impact of inlet temperature is approximately −2.3 × 10−3 m K−1. The nucleation rate in the nozzle is always concentrated in a small region.

Author

Hongtu Wu

Xi'an Jiaotong University

Miso Jurcevic

University of Split

Henrik Ström

Chalmers, Mechanics and Maritime Sciences (M2), Fluid Dynamics

Muhammad Shahzad Khurram

COMSATS University Islamabad

Hui Jin

Xi'an Jiaotong University

International Journal of Fluid Engineering

2994-9009 (ISSN) 2994-9017 (eISSN)

Vol. 1 043903

Subject Categories

Chemical Process Engineering

Fluid Mechanics and Acoustics

DOI

10.1063/5.0223253

More information

Created

10/11/2024