Details

Autor(en) / Beteiligte

• Saeedi Dehaghani, Amir Hossein

Titel

New insight into prediction of phase behavior of natural gas hydrate by different cubic equations of state coupled with various mixing rules

Ist Teil von

• Petroleum science, 2017-11, Vol.14 (4), p.780-790

Ort / Verlag

Beijing: China University of Petroleum (Beijing)

Erscheinungsjahr

2017

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Progress in hydrate thermodynamic studynecessitates robust and fast models to be incorporated inreservoir simulation softwares. However, numerous modelspresented in the literature makes selection of the best,proper predictive model a cumbersome task. It is ofindustrial interest to make use of cubic equations of state（EOS） for modeling hydrate equilibria. In this regard, thisstudy focuses on evaluation of three common EOSsincluding Peng-Robinson, Soave-Redlich-Kwong andValderrama-Patel-Teja coupled with van der Waals andPlatteeuw theory to predict hydrate P-T equilibrium of areal natural gas sample. Each EOS was accompanied withthree mixing rules, including van der Waals （vdW）,Avlonitis non-density dependent （ANDD） and general non-quadratic （GNQ）. The prediction of cubic EOSs was insufficient agreement with experimental data and withoverall AARD% of less than unity. In addition, PR plusANDD proved to be the most accurate model in this studyfor prediction of hydrate equilibria with AARD% of 0.166.It was observed that the accuracy of cubic EOSs studied inthis paper depends on mixing rule coupled with them,especially at high-pressure conditions. Lastly, the presentstudy does not include any adjustable parameter to becorrelated with hydrate phase equilibrium data.