A comparison of the catalytic hydrogenation of 2-amylanthraquinone and 2-ethylanthraquinone over a Pd/Al2O3 catalyst
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The hydrogenation of 2-ethylanthraquinone (eAQ), 2-tert-amylanthraquinone (taAQ) and their mixtures with molar ratios of 1:1 and 1:2 to the corresponding hydroquinones (eAQH2 and taAQH2) were studied over a Pd/Al2O3 catalyst in a semi-batch slurry reactor at 60 °C and at 0.3 MPa. Compared to eAQ, TaAQ exhibited a significantly slower hydrogenation rate (about half) but had a higher maximum yield of H2O2 and a smaller amount of degradation products. This can be ascribed to the longer and branched side chain in taAQ, which limits its accessibility to the Pd surface and its diffusion through the pores of the catalyst. Density functional theory calculations showed that it is more difficult for taAQ to adsorb onto a Pd (111) surface than for eAQ. The hydrogenation of the eAQ/taAQ mixtures had the slowest rates, lowest H2O2 yields and the highest amounts of degradation products.
Keywordshydrogenation hydrogen peroxide anthraquinone Pd catalyst AO process
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This work is supported by financial support from the National Natural Science Foundation of China (Grant No. 21676184).
- 3.Okninski A, Bartkowiak B, Sobczak K, Kublik D, Surmacz P, Rarata G, Marciniak B, Wolanski P. 50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, 2014Google Scholar
- 23.Li X, Su H, Ren G, Wang S. Effect of metal dispersion on the hydrogenation of 2-amyl anthraquinone over Pd/Al2O3 catalyst. Journal of the Brazilian Chemical Society, 2016, 27(6): 1060–1066Google Scholar