The absorber is the key unit in the post-combustion monoethanolamine(MEA)-based carbon dioxide(CO_(2))capture process.A rate-based dynamic model for the absorber is developed and validated using steady-state experimen...The absorber is the key unit in the post-combustion monoethanolamine(MEA)-based carbon dioxide(CO_(2))capture process.A rate-based dynamic model for the absorber is developed and validated using steady-state experimental data reported in open literature.Sensitivity analysis is performed with respect to important model parameters associated with the reaction,mass transport and phy-sical property relationships.Then,a singular value decomposition(SVD)-based subspace parameter estimation method is proposed to improve the model accu-racy.Finally,dynamic simulations are carried out to investigate the effects of the feed rate of lean MEA solution and the flue inlet conditions.Simulation results indicate that the established dynamic model can reasonably reflect the physical behavior of the absorber.Some new insights are gained from the simulation results.展开更多
A well-conditioned spectral integration(SI)method is introduced,developed and applied to nth-order differential equations with variable coefficients and general boundary conditions.The approach is based on integral re...A well-conditioned spectral integration(SI)method is introduced,developed and applied to nth-order differential equations with variable coefficients and general boundary conditions.The approach is based on integral reformulation techniques which lead to almost banded linear matrices,and the main system to be solved is further banded by utilizing a Schur complement approach.Numerical experiments indicate the spectral integration method can solve high order equations efficiently,oscillatory problems accurately and is adaptable to large systems.Applications in Korteweg-de Vries(KdV)type and Kawahara equations are carried out to illustrate the proposed method is effective to complicated mathematical models.展开更多
基金The work was financially supported by Basic Public Welfare research Plan of Zhejiang Province(LGG19F030006)Key Laboratory of Intelligent Manufacturing Quality Big Data Tracing and Analysis of Zhejiang Province,China Jiliang University(Grant No.ZNZZSZ–CJLU2022–04)the Key Research and Development Program of Ningbo(2022Z165).
文摘The absorber is the key unit in the post-combustion monoethanolamine(MEA)-based carbon dioxide(CO_(2))capture process.A rate-based dynamic model for the absorber is developed and validated using steady-state experimental data reported in open literature.Sensitivity analysis is performed with respect to important model parameters associated with the reaction,mass transport and phy-sical property relationships.Then,a singular value decomposition(SVD)-based subspace parameter estimation method is proposed to improve the model accu-racy.Finally,dynamic simulations are carried out to investigate the effects of the feed rate of lean MEA solution and the flue inlet conditions.Simulation results indicate that the established dynamic model can reasonably reflect the physical behavior of the absorber.Some new insights are gained from the simulation results.
文摘A well-conditioned spectral integration(SI)method is introduced,developed and applied to nth-order differential equations with variable coefficients and general boundary conditions.The approach is based on integral reformulation techniques which lead to almost banded linear matrices,and the main system to be solved is further banded by utilizing a Schur complement approach.Numerical experiments indicate the spectral integration method can solve high order equations efficiently,oscillatory problems accurately and is adaptable to large systems.Applications in Korteweg-de Vries(KdV)type and Kawahara equations are carried out to illustrate the proposed method is effective to complicated mathematical models.
