Prihodnost z vidika tekočih organskih nosilcev vodika: Vpliv reakcijskih pogojev na katalitsko hidrogenacijo 2-metilkinolina ob prisotnosti Ru/C katalizatorja

Krelj, Nik (author), Likozar, Blaž (mentor)

Vse večja izraba fosilnih goriv za namen proizvodnje energije, nas iz leta v leto bolj spodbuja k iskanju alternativnih obnovljivih virov, s kateremi bi jih lahko nadomestili in tako občutno zmanjšali onesnaževanje okolja. Ker v že vzpostavljeno energijsko omrežje ne prinašajo enake konsistence kot fosilna goriva, se vse bolj raziskujejo načini shranjevanja energije, za tista obdobja, ko je proizvodnja na račun obnovljivih virov visoka in je poraba ne dohaja. Na osnovi vodikove energije so tak primer LOHC (liquid organic hydrogen carrier) sistemi. Kot potencialni LOHC sistem smo preučevali heterociklično spojino 2-metilkinolin. Ob prisotnosti 5 % Ru/C katalizatorja smo spremljali vpliv reakcijskih pogojev na njegovo hidrogenacijo. Zanimalo nas je kako spremembe tlaka, temperature, mase katalizatorja ter volumna reaktanta spremenijo potek reakcije. Rezultati reakcij so pokazali, da temperatura v območju 120 – 180 °C odločilno ne pogojuje reakcijske hidrogenacije, medtem ko tlak vodika v območju med 25 in 75 bar ter volumen 2-metilkinolina v območju med 5 in 15 mL močno vplivata na hitrost poteka reakcije in na končni koncentracijski profil komponent v reakcijski mešanici. Enako kot za temperaturo velja tudi za maso katalizatorja v območju med 0,05 in 0,15 g v katerem vpliv na potek reakcije ni tako zelo očiten, vendar pa je vseeno prisoten.

• Language: Slovenian
• Keywords: vodik, energija, LOHC, hidrogenacija, 2-metilkinolin
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FKKT - Faculty of Chemistry and Chemical Technology
• Year: 2024
• PID: 20.500.12556/RUL-158980
• COBISS.SI-ID: 202630147
• Publication date in RUL: 26.06.2024

Secondary language

• Language: English
• Title: The future from the perspective of liquid organic hydrogen carriers: The influence of reaction conditions on the catalytic hydrogenation of 2-methylquinoline in the presence of Ru/C catalyst

Abstract

The increasing use of fossil fuels for energy production is pushing us harder every year to find alternative renewable sources to replace them and thus significantly reduce environmental pollution. Because they do not bring the same consistency to an already established energy grid as fossil fuels do, more and more research is being done into ways of storing energy for those periods when production at the expense of renewables is high and consumption cannot keep up. Hydrogen-based energy storage systems are a case in point. The heterocyclic compound 2-methylquinoline has been studied as a potential LOHC system. In the presence of a 5 % Ru/C catalyst, the influence of the reaction conditions on the hydrogenation of 2-methylquinoline was monitored. We were interested in how changes in pressure, temperature, mass of the catalyst and volume of the reactant alter the course of the reaction. The results showed that temperature in the range of 120-180 °C does not significantly influence the hydrogenation reaction, while hydrogen pressure in the range of 25-75 bar and 2-methylquinoline volume in the range of 5-15 mL strongly influence the reaction rate and the final concentration profile of the components in the reaction mixture. The same as for temperature is also true for the mass of the catalyst in the range between 0,05 and 0,15 g, where the influence on the course of the reaction is not so pronounced, but is nevertheless present.

• Keywords: hydrogen, energy, LOHC, hydrogenation, 2-methylquinoline