20.500.12556/DKUM-27260 Determination of oxygen by means of a biogas and gas - interference study using an optical tris (4,7-diphenyl-1,10-phenanthroline) ruthenium(II) dichloride complex sensor Biogas is a mixture of gases produced by anaerobic fermentation where biomass or animal waste is decomposed and methane and carbon dioxide are mainly released. Biogas also has a very high moisture content (up to 80%), temperatures of around 60 °C, high pressure, and can contain other gases ($N_2$, $H_2S$, $NH_3$ and $H_2$). We searched for an appropriate measuring system for the determining of oxygen in biogas, since the production process of biogas must be run under anaerobic conditions; as the presence of oxygen decreases the quality of the biogas. Ruthenium (II) complexes are by far the most widely-used oxygen dyes within optical oxygen sensors. In general, they have efficient luminescences, relatively long-life metal-ligand charge-transfer excited states, fast response times, strong visible absorptions, large Stokes shifts, and high-photochemical stability. The purpose of this work was to characterise and optimize an optical oxygen sensor using tris (4,7-diphenyl-1,10-phenanthroline) ruthenium(II) dichloride complex for measuring oxygen. Different sensor properties were additionally studied, focusing on the interference of external light, temperature, and various gases. A special gas-mixing chamber was developed for gas interference study, and online experiments are presented for oxygen determination within the pilot biogas reactor. V prispevku predstavljamo optični senzor za določanje kisika, ki smo ga pripravili z nanosom tri (4,7 difenil-1,10-fenantrolin) rutenijevega(II) diklorida na PVC film. Občutljivost senzorja smo dodatno izboljšali s postavitvijo senzorja pod kotom 45°, zaradi povečane difuzije kisika in daljšega kontaktnega časa, v primerjavi s klasično postavitvijo senzorja pod kotom 180°. Optični senzor za določanje kisika se linearno odziva na 0, 25, 50, 75 in 100 % kisika v dušiku ($R^2$ = 0.9992, n = 3), znotraj celotnega koncentracijskega območja (y = 0.0766x + 0.0878). Interferenčne študije plinov so pokazale, da plini, ki so prisotni v bioplinu ne moti jo meritev, prav tako smo uspešno izvedli preliminarne meritve kisika v bioreaktorju. Razviti optični senzor za določanje kisika odlikuje enostavna uporaba, merjenje v nad in podtlačnih pogojih ter v plinastih in vodnih fazah. tris(4 7-diphenyl-1 10-phenanthroline)ruthenium(II) dichloride complex oxygen optical sensor interferences biogas tris(4 7-difenil-1 10-fenantrolin)rutenij(II) dikloridni kompleks optični senzor kisika motnje bioplin true false true Angleški jezik Slovenski jezik Znanstveno delo 2012-06-01 10:13:56 2012-06-01 10:13:56 2022-04-15 13:40:26 2021-04-11 03:23:42 2012 0 0 str. 50-58 št. 1 Letn. 59 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1318-0207 543.5 14086149 15889686 1318-0207 URN:SI:UM:DK:VFAKMFEE Acta_Chimica_Slovenica_2012_Brglez_et_al._Determination_of_oxygen_by_means_of_a_biogas_and_gas-interference_study_using_an_optical_tris.pdf Acta_Chimica_Slovenica_2012_Brglez_et_al._Determination_of_oxygen_by_means_of_a_biogas_and_gas-interference_study_using_an_optical_tris.pdf 1 E24CE5BC000177D5CA89864238BCCD0B 4ed10e1869ac90c346e806f342a2510c32ed36379f292f06ba637a9ede350b74 42766fc6-7c07-11eb-bb7a-00155d0001ca 20.500.12556/dkum/d9524d86-b66a-43ef-9aa9-a5e90de638ed https://dk.um.si/Dokument.php?lang=slv&id=115446 http://acta-arhiv.chem-soc.si/59/59-1-50.pdf 1 https://dk.um.si/Dokument.php?lang=slv&id=115447 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0