Multiphase Equilibrium Calculations

Li, Huazhou

doi:10.1007/978-3-030-87440-7_5

Cited by 3 publications

(1 citation statement)

References 58 publications

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“…For the multiphase flash calculations, the same sequential algorithm framework SSI-Newton is widely used in the compositional simulations. ,− ,− Similarly, this solution protocol encounters convergence difficulty in the critical region . Petitfrere and Nichita and Pan et al also applied the trust-region-based method in the multiphase flash calculations.…”

Section: Introductionmentioning

confidence: 99%

A Line-Search-Based Algorithm for Multiphase Flash Calculations with CO₂–Hydrocarbon System

Xu,

Wang,

Gao

et al. 2024

ACS Omega

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Multiphase flash calculations are pivotal in compositional simulation, necessitating a robust and efficient computational algorithm. In this work, we have developed a line-search-based algorithm framework for stability analysis and multiphase flash calculations. This algorithm is rooted in the modified Newton step and line-search method. The modified Newton step, derived from modified Cholesky factorization, ensures a descent direction, while the line search determines the degree of decrease. This combination facilitates convergence even in challenging regions for phase stability analysis and multiphase flash calculations, exhibiting superlinear convergence speed. Unlike traditional approaches that rely on successive substitution iteration and may resort to Newton iteration only if the Hessian matrix is positive definite, our algorithm incorporates modification via modified Cholesky factorization upon encountering a nonpositive definite Hessian matrix. We tested our algorithm with several classical fluids, demonstrating its efficiency and robustness. Furthermore, we assessed the algorithm's performance by computing the pressure−composition diagram for the CO 2 −hydrocarbon system, where all calculations achieved rapid convergence without failure. This newly developed algorithm for phase stability analysis and multiphase flash calculations represents a significant advancement for compositional or chemical process simulations.

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Section: Introductionmentioning

confidence: 99%

A Line-Search-Based Algorithm for Multiphase Flash Calculations with CO₂–Hydrocarbon System

Xu,

Wang,

Gao

et al. 2024

ACS Omega

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Prediction of the fuel spray characteristics in the combustion chamber with methane and TiO2 nanoparticles via numerical modelling

Shao

Obaid²,

Alharbi³

et al. 2022

Fuel

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A Review of Phase Behavior Mechanisms of CO₂ EOR and Storage in Subsurface Formations

Chen

Zhou

2022

Ind. Eng. Chem. Res.

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The emissions of CO2 have been recognized as the main cause of climate change. As an important strategy being used to reduce the CO2 concentration in the atmosphere, carbon capture, utilization and storage (CCUS) has attracted significant attention in recent years. Geological formations, including depleted oil and gas reservoirs and saline aquifers, are popular CO2 storage options. During the process of CO2 storage in subsurface formations, the interactions between CO2 and formation fluids must be considered as they could greatly affect the CO2 trapping mechanisms and CO2 storage capacity. In this paper, we give a brief review of the phase behavior mechanisms associated with CO2 storage in subsurface formations. Two different CO2-storage strategies are considered in this paper: CO2 storage in saline aquifers and CO2 storage in oil reservoirs. Multiphase equilibria, including two-phase, three-phase, and four-phase equilibria, can be observed during CO2 injection into underground formations. Both the experimental and modeling studies on the related phase behavior mechanisms are included in this Review. We also introduce some recently developed robust algorithms for the multiphase equilibria calculations, which could be essential for the design of the CO2 storage process and prediction of CO2 storage capacity.

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Multiphase Equilibrium Calculations

Cited by 3 publications

References 58 publications

A Line-Search-Based Algorithm for Multiphase Flash Calculations with CO₂–Hydrocarbon System

A Line-Search-Based Algorithm for Multiphase Flash Calculations with CO₂–Hydrocarbon System

Prediction of the fuel spray characteristics in the combustion chamber with methane and TiO2 nanoparticles via numerical modelling

A Review of Phase Behavior Mechanisms of CO₂ EOR and Storage in Subsurface Formations

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Multiphase Equilibrium Calculations

Cited by 3 publications

References 58 publications

A Line-Search-Based Algorithm for Multiphase Flash Calculations with CO2–Hydrocarbon System

A Line-Search-Based Algorithm for Multiphase Flash Calculations with CO2–Hydrocarbon System

Prediction of the fuel spray characteristics in the combustion chamber with methane and TiO2 nanoparticles via numerical modelling

A Review of Phase Behavior Mechanisms of CO2 EOR and Storage in Subsurface Formations

Contact Info

Product

Resources

About

A Line-Search-Based Algorithm for Multiphase Flash Calculations with CO₂–Hydrocarbon System

A Line-Search-Based Algorithm for Multiphase Flash Calculations with CO₂–Hydrocarbon System

A Review of Phase Behavior Mechanisms of CO₂ EOR and Storage in Subsurface Formations