Investigation of gas-liquid equilibrium of a surfactantbased desiccant liquid developed for natural gas dehydration

• Autor(a) principal: Nóbrega, Geraldine Angelica Silva da
• Data de Publicação: 2008
• Outros Autores: Moura, Maria Carlenise Paiva de Alencar, Barros Neto, Eduardo Lins, Chiavone Filho, Osvaldo, Dantas Neto, Afonso Avelino
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/handle/123456789/45115
• topic: Natural gas dehydration; Gas-liquid equilibrium; Karl-Fischer method; Microemulsion; Surfactant

Natural gas is an important source of primary energy that, under normal production conditions, is saturated with water vapor. Water vapor increases the corrosiveness of natural gas, especially when acid gases are present. Several methods can be used to dry natural gas. The objectives of this study were to develop a procedure to absorb the water from natural gas in a new surfactant-based desiccant liquid and to evaluate gas-liquid equilibrium data. The principle of the desiccant liquid preparation is based on microemulsion formation (water-surfactant-oil mixtures). The dynamic method was applied for the determination of the equilibrium data, based on the saturation of the phases. The equilibrium criterion was the constancy in water concentration. Three surfactants were used for the natural gas water removal. The experimental results indicated the feasibility of the water removal from the natural gas using a specially designed absorption column and a desiccant liquid prepared with turpentine and surfactant. The gas-liquid equilibrium data were also calculated by the Peng-Robinson equation of state with the van der Waals and the modified Huron-Vidal mixing rules