Novel additives for controlled gas hydrates formation and growth

• Autores: Mohammad Tariq
• Directores de la Tesis: Ana María Rodríguez Rodríguez (dir. tes.), Francisco Javier Deive Herva (dir. tes.)
• Lectura: En la Universidade de Vigo ( España ) en 2025
• Idioma: español
• Tribunal Calificador de la Tesis: Óscar Cabeza (presid.), María Salomé Álvarez Álvarez (secret.), Susana Lucas Yagüe (voc.)
• Programa de doctorado: Programa de Doctorado en Ingeniería Química por la Universidad de Vigo
• Materias:
  • Ciencias tecnológicas
    • Ingeniería y tecnología químicas
      • Otras especialidades de ingeniería y tecnología químicas
• Enlaces
  • Tesis en acceso abierto en: Investigo
• Resumen

  • Gas hydrates (GHs) are crystalline compounds made up of small guest gas molecules trapped within the polyhedral cavities formed by the hydrogen-bonded network of water at low temperatures and moderately high pressures. On the one hand, GHs are nuisance for oil/gas industry because of their formation within the pipelines that hamper production and can also be fatal. Whereas on the other hand, GHs can accommodate a large quantity of gas in a small volume that opens many avenues for their applications in processes such as separation, storage, and even transportation. However, in any case, the primary challenge is to control their formation and dissociation. The thesis will provide in-depth investigations of the effect of various functional additives such as novel ionic liquids (amino acid-based ionic liquids, poly(ionic liquids) and encapsulated ionic liquids) and various solid surfaces on the gas hydrate formation and growth. The additives will be screened at different concentrations in realistic conditions of high pressures using a rocking cell apparatus. The phase behaviour (HLVE), kinetics (induction time, subcooling) and growth profiles of CO2 (sI) and a synthetic natural gas mixture (sII) will be studied. The growth rate and morphology of THF hydrates (sII) at atmospheric pressure in presence of additives will also be analysed in order to get further insight into the mode of action (surface adsorption or water structure alteration) of a given additive.