A comparison of the catalytic hydrogenation of 2-amylanthraquinone and 2-ethylanthraquinone over a Pd/Al2O3 catalyst

作者：Yuan, Enxian; Ren, Xiangwei; Wang, Li^*; Zhao, Wentao

来源：Frontiers of Chemical Science and Engineering, 2017, 11(2): 177-184.

DOI：10.1007/s11705-016-1604-0

• hydrogenation
• hydrogen peroxide
• anthraquinone
• Pd catalyst
• AO process

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 (eAQH(2) and taAQH(2)) were studied over a Pd/Al2O3 catalyst in a semi-batch slurry reactor at 60 degrees 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.

• 出版日期2017-6
• 单位天津大学