4 research outputs found
Porous support resistance on the permeation of asymmetric LSCF membrane in the presence of sweep gas
Inorganic membranes for green chemical production and clean power generation : Abstracts
Del 4 al 6 de septiembre, se celebrará una nueva edición del ITQ Summer School, el curso de verano organizado por el Instituto de Tecnología Química del CSIC. En esta ocasión, el empleo de ¿Inorganic membranes for green chemical production and clean power generation¿ centrará las ponencias de los expertos en membranas que partciparán en este curso. http://itqschool.blogs.upv.es/Libro de resúmenes de una escuela de verano internacional (para doctorandos e investigadores senior) en el marco de 5 cinco proyectos europeos, siendo este evento parte de sus actividades oficiales de diseminador. Se esperan en torno a 130 participantes, 85% extranjeros. Los temas abordados sin: (1) membranas de separación de oxigeno e hidrógeno, (2) técnicas avanzadas de fabricación, (3) aplicación a procesos catalíticos y separaciones avanzadas, (4) modelado teórico del transporte y química superficial, y (5) separacion por selectividad de forma en membranas porosas. Beneficios de este evento para la UPV: (1) Formación de personal, (2) divulgación de las actividades del UPV a través de prensa/TV/radio, (3) establecimiento de contactos científicos internacionales, (4) el exito del evento tanto en términos formativos, científicos como organizativos refuerza el prestigio internacional de la UPV.Serra Alfaro, JM. (2013). Inorganic membranes for green chemical production and clean power generation : Abstracts. Editorial Universitat Politècnica de València. http://hdl.handle.net/10251/31993Archivo delegad
Performance and Long-Term Stability of Pd/PSS and Pd/Al2O3 Membranes for Hydrogen Separation
The present work is focused on the investigation of the performance and long-term stability of two composite palladium membranes under different operating conditions. One membrane (Pd/porous stainless steel (PSS)) is characterized by a ~10 µm-thick palladium layer on a porous stainless steel substrate, which is pretreated by means of surface modification and oxidation; the other membrane (Pd/Al2O3) is constituted by a ~7 µm-thick palladium layer on an asymmetric microporous Al2O3 substrate. The operating temperature and pressure ranges, used for studying the performance of these two kinds of membranes, are 350–450 °C and 200–800 kPa, respectively. The H2 permeances and the H2/N2 selectivities of both membranes were investigated and compared with literature data. At 400 °C and 200 kPa as pressure difference, Pd/PSS and Pd/Al2O3 membranes exhibited an H2/N2 ideal selectivity equal to 11700 and 6200, respectively, showing stability for 600 h. Thereafter, H2/N2 selectivity of both membranes progressively decreased and after around 2000 h, dropped dramatically to 55 and 310 for the Pd/PSS and Pd/Al2O3 membranes, respectively. As evidenced by Scanning Electron Microscope (SEM) analyses, the pinholes appear on the whole surface of the Pd/PSS membrane and this is probably due to release of sulphur from the graphite seal rings