20.500.12556/RUL-183937 Selektivna hidrogenacija oleinske kisline z RuSn katalizatorji na siliki in titanovem dioksidu Selective hydrogenation of oleic acid with RuSN catalysts on silica and titanium dioxide Katalizirane reakcije so obetavna pot za reševanje trajnostnih izzivov v kemijski industriji z zmanjševanjem porabe energije in nastajanja odpadkov. Mednje spada selektivno hidrogeniranje karboksilnih kislin in estrov, ki ima ključno vlogo v industrijski in laboratorijski kemiji. V tem delu sem raziskal selektivno redukcijo nenasičene maščobne kisline – oleinske kisline, v nenasičene maščobne alkohole, z možnostjo ločevanja med cis in trans produkti – cis-oktadek-9-enol in trans-oktadek-9-enol. Aktivna komponenta katalizatorja so bili nanodelci zlitine rutenija in kositra na nevtralnih podlagah in sicer silika in titanov dioksid. Kot topilo pa sem uporabil dodekan. Hidrogenacijo sem optimiziral – dosegel sem visoko selektivnost nenasičenih alkoholov, hkrati pa sem se izognil hidrogenaciji dvojne vezi. Najvišjo selektivnost, 80 %, sem dosegel s katalizatorjem RuSn/TiO$_2$, reduciranim 6 ur pri 600 °C, ob tem pa je bil izkoristek reakcije 62 %. Ostaliprodukti hidrogenacije so bili cis in trans nenasičena aldehida, nasičeni alkoholi in aldehidi, pojavili pa so se tudi mešani estri. Catalytic reactions are a promising approach to solving the sustainability challenge by reducing energy consumption and waste generation in chemical production. These include the selective hydrogenation of carboxylic acids and esters, which plays a key role in industrial and laboratory chemistry. In this work, the selective reduction of an unsaturated fatty acid – oleic acid, into unsaturated fatty alcohols was investigated, with the possibility of distinguishing between cis and trans products, namely cis-octadec-9-enol and trans-octadec-9-enol. The active component of the catalyst consisted of ruthenium–tin alloy nanoparticles supported on neutral supports, namely silica and titanium dioxide, while dodecane was used as the solvent. The hydrogenation reaction was optimized, achieving high selectivity toward unsaturated alcohols while avoiding hydrogenation of the double bond. The highest selectivity of 80% was obtained using a RuSn/TiO$_2$ catalyst reduced for 6 hours at 600 °C, with a reaction yield of 62%. Other hydrogenation products included cis and trans unsaturated aldehydes, saturated alcohols and aldehydes, as well as mixed esters. katalizirane reakcije selektivno hidrogeniranje maščobne kisline nenasičeni maščobni alkoholi cis in trans vezi catalytic reactions selective hydrogenation fatty acids unsaturated fatty alcohols cis and trans double bonds true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2026-06-22 13:35:46 2026-06-22 13:35:54 2026-07-07 13:10:17 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 24237 283920387 Valencic_Jure_-_Selektivna_hidrogenacija_oleinske_kisline_z_RuSn_katalizatorji_na_siliki_in_tita.pdf Valencic_Jure_-_Selektivna_hidrogenacija_oleinske_kisline_z_RuSn_katalizatorji_na_siliki_in_tita.pdf 1 E87FDA493B1F7BD441B944A7FF1155A8 9d67b155755b85bd94ebd3e6e6dd278af470dbb7232d3fd112a2c7a1e6e95c72 753418c5-6e2e-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=236262 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0