20.500.12556/DKUM-62490 TERMOGRAVIMETRIČNA ANALIZA SADRE IZ TERMOELEKTRARNE ŠOŠTANJ THERMOGRAVIMETRIC ANALYSIS OF GYPSUM FROM POWER PLANT ŠOŠTANJ Diplomsko delo je osredotočeno na vzpostavitev metode za termogravimetrično analizo sadre in ovrednotenje rezultatov meritev. Termogravimetrična analiza je avtomatska metoda, s katero določamo stopnjo čistote sadre, tj. delež kalcijevega sulfata dihidrata in vsebnost kalcijevega karbonata. Z uporabo te metode lahko, v primerjavi s klasično gravimetrično metodo, zmanjšamo vpliv pogojev prostora in okolja ter človeškega faktorja, hkrati do rezultatov pridemo v bistveno krajšem času. Poleg pristopa k vzpostavitvi instrumentalne metode za uporabo v laboratoriju, diplomsko delo prikazuje tudi izvedbo verifikacije te metode in ovrednotenje merilne negotovosti rezultata. Na podlagi meritev realnih vzorcev in reagentov znane čistote smo določili merilno območje metode in medsebojno primerljivost rezultatov. Ugotovili smo, da so rezultati meritev s termogravimetrično metodo primerljivi z rezultati gravimetrične metode. Prav tako se je izkazalo, da se z uporabo instrumentalne metode skrajša čas trajanja analize, saj določanje stopnje čistote sadre in vsebnosti kalcijevega karbonata poteka zaporedno znotraj enega instrumentalnega postopka, medtem ko je z gravimetrično metodo te analize potrebno izvesti v več posameznih korakih. The thesis is focused on the establishment of a method for the thermogravimetric analysis of gypsum and evaluation of the measurement results. Thermogravimetric analysis is an automatic method for determination of a degree of purity, ie. the proportion of calcium sulphate dihydrate and also calcium carbonate content. By using this method we can reduce the impact of accommodation and environmental conditions as well as the human factors, while we get the results in much shorter time, comparing to a conventional gravimetric method. In addition of approach to establish the instrumental method for use in a laboratory, the study also shows the verification of the method and evaluation of measurement uncertainty. Based on the analyses of the real samples and reagents of known purity, the range of testing and comparison with the results achieved with the other methods were determined. We have found out that the results of measurements with thermogravimetric method are comparable with the results determined by gravimetric method. It also turned out that the use of the instrumental method indicates shorter duration of determining the degree of purity of the gypsum and the calcium carbonate content, because the instrumental analyses of the samples occur simultaneously in a single instrument procedure, while the gravimetric method must be carried out in several individual steps. sadra čistota sadre vsebnost kalcijevega karbonata termogravimetrična analiza razžvepljevanje gypsum degree of gypsum calcium carbonate content thermogravimetric analysis desulphurization true true false [V. Rebić] Slovenski jezik Angleški jezik Diplomsko delo 2016-08-28 23:57:42 2016-09-16 09:48:46 2022-06-29 03:08:41 2019-07-11 12:57:17 2016 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 543.573:549.766.21043.2) 20348694 URN:SI:UM:DK:ZR8KCSY6 UN_Rebic_Vesna_2016.pdf UN_Rebic_Vesna_2016.pdf 1 DA18D9B707364DD8BE7C5DE4C52ED13A e5c45fc133ff483d9c2a3b9ae009bb2a62038948d11b1b34b5639aa39ee3c790 68453d3d-7c0d-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=103740 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0