témavezető: Nemestóthy Nándor
társ-témavezető: Bakonyi Péter
helyszín (magyar oldal): Research Institute on Bioengineering, Membrane Technology and Energetics, Faculty of Engineering helyszín rövidítés: PE
A kutatási téma leírása:
The downstreaming, in other words, the separation/purification of various components/products is among the most crucial and energy-intense steps during natural gas processing and utilization. For this purpose, membrane technology has emerged as a feasible alternative because of its advantages such as (i) no need of chemical addition during operation (meaning an environmental merit), (ii) portability, (iii) linear scale-up factor, etc. Nowadays, membrane gas separation technology is widely applied (both at industrial and laboratory-scale) for the improvement of natural gas quality i.e. via removal of inert components as well as upgrading of biologically-produced gases (as potential natural gas substitutes).
In the gas treatment process using membranes, the pretreatment of the feed could be important to get rid of substances that may present a threat on the membrane performance and durability. Current technological schemes usually suggest the complete removal of such undesired constituents in order to ease the operation of the membrane unit. Nevertheless, in many cases full removal may not be necessary and rather, the required degree of gas conditioning should be determined experimentally. This strategy, based on the partial removal of target molecules and/or their groups, can result in a less complex, adequate performance and economically preferable solution to produce suitable feed streams for the membrane module.
This actual Ph.D. research subject should deal with the design, implementation and (experimental) optimization of gas treatment process using membranes. In the frame of the research, the Ph.D. student should investigate the effect of different process parameters and their significance by statistical approaches. For instance, studying the impact of separation temperature will be a crucial aspect. In the membrane process, as the permeate is obtained at notably lower pressure compared to the feed, the gas (due to expansion) can undergo substantial cooling especially when CO2 is available in larger quantities. Besides, the research will focus on the development of a process where the permeate stream (having normally low heating value due to the high rejection of energy carriers i.e. hydrocarbons in the retentate) can be utilized for energy generation i.e. by combustion. In this regard, the post-enrichment/mixing of the “waste” permeate with other (larger heating-value) streams can be considered. Such a hybrid approach, to our knowledge, has been hardly investigated.
The Institute has been working on membrane gas separation for more than 10 years, both in the frame of basic (OTKA) and applied (industrial) research projects.
felvehető hallgatók száma: 1
Jelentkezési határidő: 2019-01-31
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).
Bejelentkezés
