Investigation of different activity coefficient models in thermodynamic modeling of wax precipitation

Esmaeilzadeh, Feridun; Kaljahi, Jamshid Fathi; Ghanaei, Ehsan

doi:10.1016/j.fluid.2006.07.012

Cited by 27 publications

(25 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As the previous studies show [2,3], the solid wax phase has a non-ideal behavior. In this work, to describe the non-ideality of solid phase, a new modified P-UNIQUAC model based on presenting a new correlation for the estimation of interaction energy parameter has been presented.…”

Section: New Modified P-uniquacmentioning

confidence: 76%

“…It seems that, in the existing thermodynamic models, owing to the lack of a correlation for the prediction of heat capacity in the disorder solid phase, the effect of heat capacity terms related to the disorder solid phase has not been investigated. Also, many of thermodynamic models of wax formation [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] are based on a model of SL fugacity ratio in which a correlation of heat capacity difference between solid and liquid phases is used without consideration of the difference between disorder and order solid phases. In addition, some of these models [1][2][3][4][5][6][7][8][9][10][11][12][13][14] use the correlation of heat capacity difference obtained by the wax formation data instead of thermophysical property of pure component [1].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Wax formation from paraffinic mixtures: A simplified thermodynamic model based on sensitivity analysis together with a new modified predictive UNIQUAC

Ghanaei¹,

Esmaeilzadeh²,

Fathikalajahi³

2012

Fuel

View full text Add to dashboard Cite

Section: New Modified P-uniquacmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Wax formation from paraffinic mixtures: A simplified thermodynamic model based on sensitivity analysis together with a new modified predictive UNIQUAC

Ghanaei¹,

Esmaeilzadeh²,

Fathikalajahi³

2012

Fuel

View full text Add to dashboard Cite

“…• Modelo multisólido: modelo em que os precipitados são tratados como componentes puros e imiscíveis das demais fases sólidas [6,10,11].…”

Section: Avaliação De Modelos De Equilíbrio Sólido-líquidounclassified

Avaliação de Diferentes Abordagens na Solução do Problema de Equilíbrio Sólido-Líquido em Óleos Parafínicos

Blass

Bihain

Silva

et al. 2020

Tend. Mat. Apl. Comput.

View full text Add to dashboard Cite

Recebido em 25 de agosto de 2018 / Aceito em 10 de junho de 2019 RESUMO. Neste trabalho investigou-se a eficiência computacional na solução do problema de equilíbrio termodinâmico sólido-líquido (ESL) emóleos parafínicos. Foram avaliados diversos modelos termodinâmicos para a fase líquida: a equação de estado de Peng-Robinson (PR-EOS) e os modelos de coeficiente de atividade Wilson preditivo, UNIversal QUAsiChemical (UNIQUAC) preditivo e UNIQUAC Functionalgroup Activity Coefficient (UNIFAC), além do modelo de solução ideal. A fase sólidaé caracterizada pelo modelo multisólido e a previsão de formação de fase sólidaé inicialmente avaliada por um teste de estabilidade termodinâmica. Posteriormente, o sistema de equações não-lineares (SENL) formado pelas equações de equilíbrio termodinâmico e de balanço materialé resolvido pelo método de Newton multivariável. Até onde pudemos verificar, não há estudos sistemáticos sobre o efeito do tipo de modelo (e sua complexidade) no tempo de computação necessário para a solução do problema. Por outro lado, tendo em conta o elevado número de componentes nas frações de petróleo estudadas, aspectos como a robustez (frente a diferentes estimativas iniciais) e tempo de computação são aspectos importantes neste contexto e que foram analisados neste trabalho. Palavras-chave: modelo multisólido, deposição de parafinas, equilíbrio sólido-líquido. 1 INTRODUÇÃO O problema do equilíbrio sólido-líquido tratado aqui consiste em: dada a temperatura, a pressão e a composição (global) de um petróleo parafínico, determinar a quantidade de cada compo

show abstract

“…The knowledge of wax formation phenomena has been improved both experimentally and theoretically . While literature is rich in reporting wax appearance temperature (WAT), scientists argue that wax disappearance temperature (WDT) is closer to the wax equilibrium condition .…”

Section: Introductionmentioning

confidence: 99%

Phase boundaries for synthetic light oils and gas condensate mixtures using predictive equations of state with a solid solution model

Nasrifar

Javanmardi

2018

Can J Chem Eng

View full text Add to dashboard Cite

Phase boundaries for five synthetic paraffinic mixtures were predicted using a previously developed Gibbs energy minimization algorithm. In this method, the vapour and liquid phases were described by cubic equations of state (EoS). These EoS employed a predictive temperature-dependent group-contribution binary interaction parameter model. The solid phase was described using a universal quasi-chemical activity coefficient (UNIQUAC) solid solution model. Using this algorithm, the phase boundaries were calculated from a temperature-search strategy. The predicted phase boundaries were found to be in good agreement with experimental phase boundaries for vapour-liquid (VL), solid-liquid (SL), solid-vapour (SV), and solid-vapour-liquid (SVL) regions. The model was also used to predict the phase boundaries at low temperatures where no experimental data were available.

show abstract

Investigation of different activity coefficient models in thermodynamic modeling of wax precipitation

Cited by 27 publications

References 27 publications

Wax formation from paraffinic mixtures: A simplified thermodynamic model based on sensitivity analysis together with a new modified predictive UNIQUAC

Wax formation from paraffinic mixtures: A simplified thermodynamic model based on sensitivity analysis together with a new modified predictive UNIQUAC

Avaliação de Diferentes Abordagens na Solução do Problema de Equilíbrio Sólido-Líquido em Óleos Parafínicos

Phase boundaries for synthetic light oils and gas condensate mixtures using predictive equations of state with a solid solution model

Contact Info

Product

Resources

About