Abstract
The dynamics of ethylene oxide sorption and desorption on Al2O3 sorbent were investigated. The investigations of ethylene oxide sorption on Al2O3 show that significant sorption appeared above 125?C. The removal of sorbed ethylene oxide from Al2O3 was achieved by continuous increasing of the temperature up to 450?C in air stream. The analysis of desorbed products show that 90% of adsorbed ethylene oxide is converted to CO2 and the rest consists of the three derivatives of ethylene oxide. The exact composition of desorbed organic products will be determined in further investigation. The desorption temperature profiles point out the presence of two exothermic picks, as was confirmed by detection of CO2 and derivates of ethylene oxide at these temperatures. Investigation of textural characteristics and thermal stability of Al2O3 sorbent show that there are no changes of any characteristics of Al2O3 in sorption/desorption operating temperatures regimes. Only at 700?C the specific surface area of Al2O3 decreases of about 10%. This indicates that the investigated Al2O3 is convenient material for removal of ethylene oxide by sorption.
Highlights
Iako se radi o relativno malim količinama etilen oksida zbog njegove izuzetne toksičnosti neophodno je primeniti postupke za njegovo uklanjanje što je takođe regulisano i postojećim zakonskim normama
Regeneracija alumine za ponovni ciklus sorpcije etilen oksida je moguća u protoku vazduha uz programirani rast temperature
This indicates that the investigated Al2O3 is convenient material for removal of ethylene oxide by sorption
Summary
U ovom radu prikazana su ispitivanja dinamike sorpcije i desorpcije etilen oksida na Al2O3 kao i sorpcioni kapaciteti, temperaturni režimi desorpcije i sastav produkata desorpcije etilen oksida. Iako se radi o relativno malim količinama etilen oksida (oko 12 kg po jednom sterilizacionom ciklusu) zbog njegove izuzetne toksičnosti neophodno je primeniti postupke za njegovo uklanjanje što je takođe regulisano i postojećim zakonskim normama. U cilju uštede energije kod ovakvih procesa moguće je kombinovati više postupaka za uklanjanje VOC-a, na primer, sorpcija/ desorpcija i katalitičko sagorevanje [3]. Uočena sorpcija etilen oksida na Pt/Al2O3 katalizatoru na temperaturama znatno nižim od temperatura iniciranja katalitičke reakcije otvorila je mogućnost kombinovanja procesa sorpcije i katalitičkog sagorevanja radi smanjenja utroška energije. U ovom radu, u culju ispitivanja mogućnosti uklanjanja etilen oksida sorpcijom na Al2O3, detaljno je ispitana dinamika sorpcije etilen oksida, sorpcioni kapaciteti, temperaturni režimi desorpcije i sastav produkata desorpcije, na komercijalnom Al2O3
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