Numerical simulation of clean separation through gas-liquid phase transition of gas products from biomass gasification in supercritical CO2 using a supersonic nozzle

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2025-04-17 DOI:10.1016/j.supflu.2025.106636

Hongtu Wu , Yimeng Wei , Zhiheng Huang , Qingang Xiong , Hui Jin

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引用次数: 0

Abstract

The supercritical CO₂ biomass gasification technology can both reduce CO₂ to produce CO gas and efficiently utilize biomass energy. This study employs a supersonic nozzle to achieve clean separation of gas products from supercritical CO₂ biomass gasification, enabling CO₂ recycling and reducing the cost of further CO purification. Numerical simulation results indicate that the inlet conditions of the nozzle significantly affect the gas-liquid phase transition of the mixed gas, allowing for the recovery of approximately 0.065 mass fraction of CO₂. The shape of the nozzle's convergent section has negligible influence on the phase transition of the gas, whereas increasing the length of the divergent section effectively enhances the recovery of CO₂ at the outlet by promoting droplet growth. Variations in the composition of the mixed gas have a certain impact on the number of droplets formed during the phase transition, but the overall effect on the condensation process is minor.

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.