Browsing by Author "Medrano, J. A."
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Item Advances on high temperature Pd-based membranes and membrane reactors for hydrogen purifcation and production(2017-06-01) Gallucci, F.; Medrano, J. A.; Fernandez, E.; Melendez, J.; Van Sint Annaland, M.; Pacheco-Tanaka, D. A.; TECNOLOGÍAS DE HIDRÓGENO; Tecnalia Research & Innovation; TECNOLOGÍA DE MEMBRANAS E INTENSIFICACIÓN DE PROCESOSMembrane technology applied in the chemical and energy industry has the potential to overcome many drawbacks of conventional technologies such as the need of large volume plants and large CO2 emissions. Recently, it has been reported that this technology might become more competitive when operated at high temperatures. This is mostly associated with the required of heat integration at large scale. However, good membrane stability combined with high permeation rates and high perm-selectivities, has only been achieved at intermediate/low temperatures (< 500 °C). When operated at these lower temperatures in a fully integrated plant, there is often the need of electricity import, which strongly decreases the process efciency and renders the membrane-based technology less competitive compared to conventional technologies. To improve the competitiveness of membrane technology further developments are required, demanding in particular an improvement in the preparation methods, the use of new materials and/or the development of novel reactor confgurations. In this study, a comprehensive review on the latest advancements in membrane technology for H2 separation at high temperature is presented. Special attention is given to the membranes prepared and presented in the literature in the last years for high-temperature applications, as well as the different membrane reactor confgurations that have proposed, tested and evaluated for different reaction systems at elevated temperatures. Since concerns about the need of high temperatures in membrane technology are relatively new, this review is limited to the results reported in the literature during the last fve years.Item Membrane reactors using metallic membranes(Elsevier, 2020-01-08) Gallucci, Fausto; Pacheco Tanaka, D. A.; Medrano, J. A.; Viviente Sole, J. L.; TECNOLOGÍA DE MEMBRANAS E INTENSIFICACIÓN DE PROCESOSA very interesting application of metallic membranes is their integration in multifunctional reactors called membrane reactors. This integration allows carrying out reaction and separation in a single device, which results in higher yields and milder conditions compared with conventional reactor systems. These results translate in lower CAPEX (because of reduction of reaction volume and circumventing downstream separations) and reduction of OPEX (because of milder conditions used in the reactor). This chapter introduces the concept of membrane reactors and gives an overview of the latest results achieved in membrane reactor performance and operation.Item Metallic membranes for hydrogen separation(Elsevier, 2020-01-08) Pacheco Tanaka, D. A.; Medrano, J. A.; Viviente Sole, J. L.; Gallucci, Fausto; TECNOLOGÍA DE MEMBRANAS E INTENSIFICACIÓN DE PROCESOSHydrogen separation is one of the larger applications of metallic membranes. Mostly, palladium (Pd)-based membranes have been developed and used for this application because of their high flux and high permselectivity. This chapter will discuss in more detail the production and use of supported and unsupported membranes for hydrogen separation. Particularly, the supported thin film Pd membranes are discussed in more detail as these are the closest to the market. Production methods are discussed along with the pros and cons of these types of membranes.Item An overview of some recent european projects on metallic membranes(Elsevier, 2020-01-08) Viviente Sole, J. L.; Pacheco Tanaka, D. A.; Medrano, J. A.; Gallucci, Fausto; TECNOLOGÍA DE MEMBRANAS E INTENSIFICACIÓN DE PROCESOSMetallic membranes and membrane reactors have become very popular tools for several process intensification strategies. This is being well recognized at European level, where several projects have been granted in the course of the last three Framework Programs on both membranes as separation tools and especially membrane reactors as process integration tools. This chapter, although not exhaustive (especially because of confidentiality issues), gives a good overview of the recent results of several EU-funded projects. It is worth noting that, apart from these projects, each country has also granted research projects on membrane reactors. These are not discussed in this chapter, although many results have already been reported in other chapters.Item Palladium based membranes and membrane reactors for hydrogen production and purification(2016) Fernandez, E.; Helmi, A.; Medrano, J. A.; Coenen, K.; Arratibel, A.; Melendez, J.; Spallina, V.; Viviente, J. L.; Zuñiga, J.; Van Sint Annaland, M.; Pacheco Tanaka, D. A.; Gallucci, F.; TECNOLOGÍAS DE HIDRÓGENO; TECNOLOGÍA DE MEMBRANAS E INTENSIFICACIÓN DE PROCESOS; Tecnalia Research & InnovationItem Palladium based membranes and membrane reactors for hydrogen production and purification: An overview of research activities at Tecnalia and TU/e(2017-05-11) Fernandez, E.; Helmi, A.; Medrano, J. A.; Coenen, K.; Arratibel, A.; Melendez, J.; de Nooijer, N. C.A.; Spallina, V.; Viviente, J. L.; Zuñiga, J.; van Sint Annaland, M.; Pacheco Tanaka, D. A.; Gallucci, F.; TECNOLOGÍAS DE HIDRÓGENO; TECNOLOGÍA DE MEMBRANAS E INTENSIFICACIÓN DE PROCESOS; Tecnalia Research & InnovationIn this paper, the main achievements of several European research projects on Pd based membranes and Pd membrane reactors for hydrogen production are reported. Pd-based membranes have received an increasing interest for separation and purification of hydrogen. In addition, the integration of such membranes in membrane reactors has been widely studied for enhancing the efficiency of several dehydrogenation reactions. The integration of reaction and separation in one multifunctional reactor allows obtaining higher conversion degrees, smaller reactor volumes and higher efficiencies compared with conventional systems. In the last decade, much thinner dense Pd-based membranes have been produced that can be used in membrane reactors. However, the thinner the membranes the higher the flux and the higher the effect of concentration polarization in packed bed membrane reactors. A reactor concept that can circumvent (or at least strongly reduce) concentration polarization is the fluidized bed membrane reactor configuration, which improves the heat transfer as well. Tecnalia and TU/e are involved in several European projects that are related to development of fluidized bed membrane reactors for hydrogen production using thin Pd-based (<5 μm) supported membranes for different application: In DEMCAMER project a water gas shift (WGS) membrane reactor was developed for high purity hydrogen production. ReforCELL aims at developing a high efficient heat and power micro-cogeneration system (m-CHP) using a methane reforming fluidized membrane reactor. The main objective of FERRET is the development of a flexible natural gas membrane reformer directly linked to the fuel processor of the micro-CHP system. FluidCELL aims the Proof-of-Concept of a m-CHP system for decentralized off-grid using a bioethanol reforming membrane reactor. BIONICO aims at applying membrane reactors for biogas conversion to hydrogen. The fluidized bed system allows operating at a virtually uniform temperature which is beneficial in terms of both membrane stability and durability and for the reaction selectivity and yield.Item Transport mechanism and modeling of microporous carbon membranes(Elsevier, 2019-01-01) Medrano, J. A.; Llosa-Tanco, M. A.; Pacheco-Tanaka, D. A.; Gallucci, F.; TECNOLOGÍA DE MEMBRANAS E INTENSIFICACIÓN DE PROCESOSCarbon molecular sieve membranes (CMSM) have gained increased interest in the last decade as they allow an excellent compromise between performance, in terms of permeability and separation factors, while exhibiting a very good chemical and mechanical stability. Their performance is nowadays better than commercial polymeric membranes, although their production costs are still higher and represent one of the main limitations for their large-scale exploitation. In this chapter, a comprehensive overview of CMSM is given, paying special attention to the transport mechanism of gases through these membranes, the equations describing this phenomenon, the strategies to follow for maximizing their performance, and finally the potential applications of these membranes.