A comparison of the catalytic hydrogenation of
A comparison of the catalytic hydrogenation of
复制标题
催化加氢比较
DOI：
10.1007/s11705-016-1604-0
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Zhao wentao
中科院分区：
文献类型：
--
作者：
Yuan enxian;Ren xiangwei;Wang li;Zhao wentao
在半间歇浆态床反应器中，研究了2-乙基蒽醌（eAQ）、2-叔戊基蒽醌（taAQ）及其与相应的对苯二酚（eAQH 2和taAQH 2）的摩尔比为1：1和1：2的混合物在Pd/Al 2 O3催化剂上的加氢反应。与eAQ相比，TaAQ的加氢速率明显减慢（约为eAQ的一半），但H2 O2的最大产率较高，降解产物较少。这可归因于taAQ中的较长和支链侧链，其限制了其对Pd表面的可及性及其通过催化剂的孔的扩散。密度泛函理论计算表明taAQ比eAQ更难吸附在Pd（111）表面上。氢化的eAQ/taAQ混合物具有最慢的速率，最低的H2 O2产量和最高量的降解产物。
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 (eAQH2and taAQH2) were studied over a Pd/Al2O3catalyst 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 H2O2and 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 H2O2yields and the highest amounts of degradation products.