The Effect of Mg and Zn Dopants on Pt/Al2O3 for the Dehydrogenation of Perhydrodibenzyltoluene

The effects of Mg and Zn dopants on the catalytic performance Pt/Al2O3 catalyst were investigated for dehydrogenation perhydrodibenzyltoluene (H18-DBT) as a liquid organic hydrogen carrier. Al2O3 supports modified with to produce Mg-Al2O3 Zn-Al2O3 target loading 3.8 wt.% dopants. impregnated chloroplatinic acid solution catalysts Pt/Al2O3, Pt/Mg-Al2O3 Pt/Zn-Al2O3 0.5 Pt loading. Thereafter, characterised using inductively coupled plasma- optical emission spectrometry, scanning electron microscopy-energy dispersive X-ray spectroscopy, temperature-programmed reduction, carbon-monoxide pulse chemisorption, ammonia desorption, diffraction transmission microscopy. experiments performed horizontal plug flow reactor system time-on-stream was 22 h. showed highest average flowrate 29 nL/h, while an 27 nL/h obtained both Pt/Zn-Al2O3. This has resulted in yield 80% Pt/Mg-Al2O3, 71% 73% Pt/Al2O3. In addition, conversion H18-DBT ranges from 99% 92%, 97–90% 96–90% respectively. Following latter order, selectivity dibenzyltoluene (H0-DBT) 78% 57%, 75–51% 71–45%. Therefore, improved towards H18-DBT.