1. URJC-Repsol-YPF Flow Assurance Laboratory, Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain, and Centro Tecnológico Repsol-YPF, Carretera N-V Km 18, 28931 Móstoles, Madrid, Spain