2 research outputs found
Ranking of rectification structures separating quaternary mixtures with exergy analysis
In this paper exergy analysis is applied to select the most efficient rectification structures for separation of quaternary hydrocarbon mixtures. The basis and usage of exergy analysis is shown, as well as the benefits of its application. Exergy loss and thermodynamic efficiency is calculated from basic equations of thermodynamics. The ranking, even based on exergy analysis, highly depends on the product purification prescription. Finally it is shown that heat integration of distillation columns is exergetically beneficial in a wide product purity range
FenntarthatĂł fejlĹ‘dĂ©s zöld technolĂłgiákkal törtĂ©nĹ‘ megvalĂłsĂtásának kutatása = Improvement of sustainable development with green technologies
EredmĂ©nyeink: 1. A megĂşjulĂł nyersanyag Ă©s energiatermelĂ©s tĂ©makörben igazoltuk, hogy a biomassza direkt hasznosĂtása mintegy tĂzszer jobb hatĂ©konyságĂş, mint az indirekt (ĂĽzemanyag) hasznosĂtás. MegállapĂtottuk, hogy a membránszűrĂ©s jĂł hatĂ©konysággal alkalmazhatĂł a biolĂłgiai alapĂş megĂşjulĂł energiahordozĂłk feldolgozásában, pl. cukorcirok, szĂłja fĹ‘zĹ‘lĂ© feldolgozás, állati táplálĂ©k-kiegĂ©szĂtĹ‘k feldolgozása/gyártása. MegvalĂłsult ipari tervezĂ©sĂĽnk van a tĂ©makörben. A pervaporáciĂłra Ăşj modellt állapĂtottunk meg, mely jobban Ă©s szĂ©lesebb koncentráciĂł intervallumban alkalmazhatĂł, mint az eddigiek. 2. A termĂ©szeti erĹ‘források hatĂ©kony felhasználása tĂ©makörben az energia hathatĂłs hasznosĂtását vizsgáltuk a rektifikálás tĂ©makörben. MegállapĂtottuk az exergiának a fontosságát Ă©s alkalmazási terĂĽleteit. D (desirability)-fĂĽggvĂ©nnyel vizsgáljuk az egyes rektifikálási alternatĂvák komplex hatását. 3. Az elkerĂĽlhetetlen emissziĂłk kezelĂ©sĂ©nek tĂ©makörĂ©ben a technolĂłgiai hulladĂ©kvizek szerves illĂ©kony szennyezĹ‘inek (VOC) Ă©s szerves halogĂ©nvegyĂĽleteinek (AOX) eltávolĂtására egy rektifikáláson alapulĂł mĂłdszert dolgoztunk ki,mellyel az AOX 8ppm alá szorĂthatĂł. MegvalĂłsult ipari tervezĂ©sĂĽnk van a tĂ©makörben. 4. Az egyes technolĂłgiai fejlesztĂ©sek környezeti hatáselemzĂ©sĂ©nek eszköze az Ă©letciklus elemzĂ©s. EgyĂ©rtelmű kapcsolatot állapĂtottunk meg az egyes elemzĹ‘ mĂłdszerek között. ProjektĂĽnkben 44 publikáciĂł. amibĹ‘l 4 “summa cum laude” minĹ‘sĂ©tĂ©sű PhD disszertáciĂł, szĂĽletett. | Our results: 1. We proved in the area of renewable raw material and energy production that the direct biomass utilization is ten times more efficient than that of the indirect (biofuel) one. We determined that the membrane filtration can be used with good efficiency in the case of processing raw materials or energy carriers of biological origin, e.g. sweet shogrun, soya process water, animal food supplement production/processing. We completed industrial design in this area. We established a new mathematical model for pervaporation that describes more efficient this operation than the previous ones. 2. In the area of the efficient use of natural resources, we investigated the effective use of energy in the rectification. We determined the importance of the use of the exergy and its application areas. D(desirability)-function was used to investigate the complex impact of the different rectification alternatives. 3. For the treatment of the inevitable emissions, the removal of the volatile organic compounds (VOC) and the adsorbable organic halides (AOX) impurities from process wastewaters we developed a method based on rectification which is capable to reduce the AOX content below 8ppm. . We completed industrial design in this area. 4. The tool of the estimation of environmental impacts is the life cycle assessment (LCA). We determined clear connection among different LCA methods. We completed 44 publications, among them 4 “summa cum laude” PhD dissertation