Experimental determination and thermodynamic modeling of clathrate hydrate stability conditions in methane + hydrogen sulfide + water system
作者： Mahnaz Aghajanloo , Zahra Taheri , Taraneh Jafari Behbahani , Amir H. Mohammadi , Mohammad Reza Ehsani
DOI: 10.1016/J.JNGSE.2020.103549
关键词:
摘要: Abstract In the petroleum industry, it is essential to comprehend hydrate equilibrium qualifications in order prevent or defer this phenomenon. However, thermodynamic information on hydrogen sulfide containing systems reported literature limited and discrepant comparison with other gases. communication, new experimental investigations of dissociation conditions methane (0.995 mole fraction) + hydrogen (0.005 mole fraction) + water system which forms stable structure I were carried out temperature pressure ranges from 282.1 288.3 K 5.63 12.19 MPa, respectively. The experiments by using stepwise heating method an isochoric search procedure a 100 cm3 autoclave. apparatus validity confirmed data current study some selected literature. study, model was developed estimate binary CH4+H2S system. For purpose, systematic made between results PC-SAFT (Perturbed-Chain Statistical Associating Fluid Theory) CPA (Cubic Plus Association) equations state (EoS). present work, are utilized gas/vapor water phases van der Waals Platteeuw (vdW-P) used for phase modeling. regard, interaction parameters PC-SAFT/CPA EoS aforementioned tuned H2S/CH4 solubility water. Model outcomes show that both models entirely trustworthy over extensive range temperatures (273 350 K), (2 22 MPa) all H2S concentrations. addition, data, HWHydrate (version 1.1) predictions ascertain relatively precise than CH4-H2S.
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