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Testiranje sodobnih katalizatorjev za sintezo metanola
Drobež, Katja (Author), Marinšek, Marjan (Mentor) More about this mentor... This link opens in a new window

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Abstract
Zaradi sodobnega načina življenja se zelo hitro povečuje koncentracija ogljikovega dioksida v ozračju. Strokovnjaki iščejo rešitve za zmanjšanje njegove koncentracije. Ena izmed rešitev je njegova pretvorba v metanol. Pri tem se v industriji uporabljajo katalizatorji, ki pospešijo določene kemijske reakcije za pretvorbo reaktanta v željeni produkt. Pri razvoju katalizatorjev se izvajajo različna testiranja, da najdemo najbolj aktivnega, specifičnega in stabilnega za določeno reakcijo. Nekateri izmed katalizatorjev, kateri se uporabljajo pri sintezi metanola so Cu/ZnO/Al2O3, Cu/SrTiO3 in Pd/In2O3, ki so jih testirali na Kemijskem inštitutu v Ljubljani. Podatke testiranj sem analizirala in iz njih pridobila, kako na selektivnost, aktivnost in aktivacijsko energijo vpliva različen nanos nanodelcev bakra na katalizatorju SrTiO3. Te katalizatorje sem primerjala tudi s Pd/In2O3 in Cu/ZnO/Al2O3. Ugotovitve so pokazale, da se aktivnosti katalizatorjev z različnim nanosom bakra na SrTiO3 v odvisnosti od časa v večini primerov ne spreminjajo, selektivnosti pa naraščajo. Navidezni aktivacijski energiji tvorbe metanola pri katalizatorjema z 0,5 in 5 % nanosom bakra na SrTiO3 sta med seboj precej podobni, skoraj enaki. Pri primerjanju različnih tipov katalizatorjev rezultati kažejo, da ima najvišjo navidezno aktivacijsko energijo nastanka metanola Pd/In2O3, najnižjo pa Cu/ZnO/Al2O3.

Language:Slovenian
Keywords:metanol, hidrogenacija CO2, katalizatorji, kataliza, testiranje katalizatorjev
Work type:Bachelor thesis/paper (mb11)
Tipology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Technology
Year:2020
COBISS.SI-ID:28563715 Link is opened in a new window
Views:83
Downloads:41
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Secondary language

Language:English
Title:Testing of modern catalysts for the synthesis of methanol
Abstract:
Due to the modern way of life, the concentration of carbon dioxide in the atmosphere is increasing very quickly. Experts are looking for solutions to reduce its concentration. One of the solutions is its conversion to methanol. In doing so, catalysts are used in industry to accelerate certain chemical reactions to convert the reactant to the desired product. In the development of catalysts, various tests are performed to find the most active, specific and stable one for a particular reaction. Some of the catalysts used in the synthesis of methanol are Cu/ZnO/Al2O3, Cu/SrTiO3 and Pd/In2O3 and they were tested at the Institute of Chemistry in Ljubljana. I analyzed the test data and found out how the selectivity, activity and activation energy are affected by different deposition of copper nanoparticles on the SrTiO3 catalyst. I also compared these catalysts with Pd/In2O3 and Cu/ZnO/Al2O3. The findings showed that the activities of catalysts with different copper deposition on SrTiO3 do not change in most cases depending on time, and the selectivities increase. The apparent activation energies of methanol formation in catalysts with 0.5 and 5 % copper deposition on SrTiO3 are quite similar, almost identical. When comparing different types of catalysts, the results show that Pd/In2O3 has the highest apparent activation energy of methanol formation and Cu/ZnO/Al2O3 the lowest one.

Keywords:methanol, CO2 hydrogenation, catalysts, catalysis, catalyst testing

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